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| 1 | Interface and properties of epoxy resin modified by elastomeric nano-particles显示文摘Study on a new composite of epoxy resin/elastomeric nano-particles (ENP) is re- ported in this paper, which shows that, in comparison with pure epoxy resin and epoxy toughened with CTBN, the composites of epoxy resin/carboxylic nitrile-butadiene ENP and epoxy resin/styrene butadiene vinyl-pyridine ENP possess both higher toughness and heat resistance. Both ENPs used in the study have an average size of less than 100 nm. Study on the epoxy network’s morphology and interface properties suggests that due to the chemical reaction be- tween ENP and epoxy resin and more hydrogen bonds between nitrile groups of the rubber and hydroxyl groups of the epoxy resin, stronger interaction at the larger interface may lead to the observed excellent properties of the epoxy resin toughened with ENP. | HUANG Fan1, LIU Yiqun1, ZHANG Xiaohong1, GAO Jianming1, SONG Zhihai1, TANG Banghui1, WEI Genshuan2 & QIAO Jinliang1 1. SINOPEC Beijing Research Institute of Chemical Industry, Beijing 100013, China 2. Institute of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100080, China Correspondence should be addressed to Qiao Jinliang (email: jqiao@brici.ac.cn.) | 2005 | Science China Chemistry2005，48，2： | 9 |
| 2 | Preparation of polystyrene/silica nanocomposites by radical copolymerization of styrene with silica macromonomer显示文摘A two-stage process has been developed to generate the silica-based macromonomer through surface-modification of silica with polymerizable vinyl groups. The silica surfaces were treated with excess 2,4-toluene diisocynate (TDI), after which the residual isocyanate groups were converted into polymerizable vinyl groups by reaction with hydroxypropylacrylate (HPA). Thus, polystyrene/silica nanocomposites were prepared by conventional radical copolymerization of styrene with silica macromonomer. The main effecting factors, such as ratios of styrene to the macromonomer, together with polymerization time on the copolymerization were studied in detail. FTIR, DSC and TGA were utilized to characterize the nanocomposites. Experimental results revealed that the silica nanoparticles act as cross-linking points in the polystytene/silica nanocomposites, and the glass transition temperatures of the nanocomposites are higher than that of the corresponding pure polystyrene. The glass transition temperatures of nanocomposites increased with the increasing of silica contents, which were further ascertained by DSC. | OU BaoLi1,2 & LI DuXin2 1 College of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China 2 State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China | 2007 | Science China Chemistry2007，50，3： | 6 |
| 3 | Synthesis of HTLcs modified by K_(3)PO_(4) for side chain alkylation of toluene with methanol显示文摘A series of calcined HTLcs catalysts were prepared and modified with potassium phosphate by impregnation method to clarify the influence of catalyst alkalinity on the side chain alkylation of toluene with methanol for synthesis of ethylbenzene and styrene.The catalysts were characterized by X-ray diffraction(XRD),N_(2)physical adsorption-desorption,Fourier-transform infrared spectroscopy(FT-IR),Scanning electron microscopy(SEM),X-ray photoelectron spectrometry(XPS),NH_(3)temperature-programmed desorption(NH_(3)-TPD)and CO_(2)temperature-programmed desorption(CO_(2)-TPD).It was found that the selectivity of styrene was highest(39.25%)when the K_(3)PO_(4)loading was 7.5 wt%.And the total yield of styrene and ethylbenzene could reach 65.08%with 10 wt%K_(3)PO_(4)loading.This might due to the fact that the addition of K_(3)PO_(4)could adjust the acid and basic sites of catalysts.In addition,appropriate strength and amount of basic sites were favorable to producing more styrene. | Chunyao Hao Yueli Wen Bin Wang Faraz Ahmad Yuhua Liu Huijun Li Wei Huang | 2021 | Green Energy & Environment2021，6，6： | 6 |
| 4 | Theoretical and Experimental Study on Reaction Coupling: Dehydrogenation of Ethylbenzene in the Presence of Carbon Dioxide显示文摘到苯乙烯(圣) 的乙苯(EB ) 的除氢作用面对 CO2,在 EB,除氢作用被结合反向的水气体移动(RWGS ) ,通过理论分析和试验性的描述广泛地被调查。联合的反应证明了比在几个方面的单个除氢作用优异。热力学的分析建议 EB 的那平衡变换能被由于从除氢作用生产的氢的同时的消除联合的反应极大地改进。催化测试证明了与某些倡导者一起在活性炭或 Al2O3 上支持的那个熨斗和钒是为这个联合过程的潜在的催化剂。铁和钒的催化剂在反应机理是不同的,尽管圣产量总是在各种各样的催化剂上与 CO2 变换被联系。当一步舞小径在 V/Al2O3 上统治反应时,二拍子的圆舞小径在 Fe/Al2O3 上在联合过程起一个重要作用。科克免职和活跃部件的深减小是催化剂释放的主要原因。CO2 能通过在联合过程在高原子价保存活跃种类有效地减轻催化剂释放,尽管它不能压制焦炭免职。给词调音:联合的反应;乙苯除氢作用;苯乙烯;二氧化碳;水气体移动;反应机理; | Shuwei Chen Zhangfeng Qin Ailing Sun Jianguo Wang | 2006 | Journal of Natural Gas Chemistry2006，15，1： | 5 |
| 5 | Studies on the Mechanism of the Direct Synthesis of Styrene form Benzene and Ethylene显示文摘StudiesontheMechanismoftheDirectSynthesisofStyreneformBenzeneandEthyleneZHANGQiang,JINRi-guang(CollegeofMater,Sci,andTech,Bei... | ZHANG Qiang , JIN Ri-guang (College of Mater, Sci, and Tech, Beijing Univ, of Them, Beijing,100029) YANG Jun (Dept. of Phys, Chem, Shenyang Pharmaceutical Univ., Shenyang,110015) | 1997 | Chemical Research in Chinese Universities1997，13，3： | 5 |
| 6 | SYNTHESIS AND CHARACTERIZATION OF AMPHIPHILIC GRAFT COPOLYMER CONTAINING MICROPHASE SEPARATED AND LONG POLY(ETHYLENE OXIDE) SIDE CHAIN STRUCTURES显示文摘Acryloyl terminated Poly (ethyleneoxide)macromonomers (PEO-A) with different PEO chain lengths have been prepared by deactivation of PEO alkoxide with acryloyl chloride. A new kind of amphiphilic polystyrene-g-poly (ethylene oxide)graft copolymer containing both microphase separated and PEO side chain structures has been synthesized from radical copolymerization of PEO-A macromonomer with styrene. After careful purification by a newly-developed method called 'selective dissolution’, the well-defined structure of the purified copolymers was confirmed by IR, ~1H-NMR and GPC. Various experimental parameters controlling the copolymerization were studied in detail. The results indicated that the feed ratio of styrene to macromonomer(S/M) was the most important determining factor for the composition of the copolymers. A detailed 'comb- model' was proposed to describe the molecular structure of the graft copolymers. Finally, this amphiphilic graft copolymers may readily form microphase separated structures as clearly indicated by transmission electron microscopy. | 邱永兴 俞小洁 封麟先 杨士林 | 1993 | Chinese Journal of Polymer Science1993，11，1： | 4 |
| 7 | Effects of Hydrophilic Monomer Types and Level on Polystyrene-Acrylate/montmorillonite Nanocomposite Made by Emulsion Polymerization显示文摘1 Results Nanocomposite has attracted more and more interest all over the world.Polystyrene (PS) is a commercialized and mass-productive polymer,continuous research efforts have been devoted to the development of polystyrene/montmorillonite (PS/MMT) nanocomposites[1-2].But the polarity of styrene (St) is too small to intercalate the space between the clay layers.The polarity of hydrophilic monomer is so strong that it can intercalate the MMT easily,the intercalated smectic clays maybe exfoliated by usin... | F.A.Zhang L.Chen J.Q.Ma X.Yang | 2007 | 复旦学报(自然科学版)2007，46，5： | 3 |
| 8 | CATALYTIC COPOLYMERIZATION OF STYRENE AND ETHYLENE BY NEUTRAL NICKEL(Ⅱ) COMPLEXES IN EMULSION显示文摘Emulsion copolymerization of styrene and ethylene catalyzed by a series of neutral nickel(Ⅱ) complexes was carried out in an aqueous system to give high-molecular-weight copolymers.The copolymers and emulsions were characterized by an array of techniques including NMR,GPC,TEM,WAXD and DSC.The results indicate that the copolymers obtained are mostly block copolymers of polyethylene with random insertion of styrene units,and their M_W is in the range of 10~5-10~6.By enhancing the electron withdrawing of th... | 袁荞龙 | 2009 | Chinese Journal of Polymer Science2009，27，5： | 3 |
| 9 | Synthesis of curcuminoid-imprinted polymers applied to the solidphase extraction of curcuminoids from turmeric samples显示文摘A molecular imprinting polymer technique was successfully applied to precipitation polymerization by using styrene as a functional monomer, curcuminoids as templates, acetonitrile as a porogenic solvent,benzoyl peroxide as the initiator, and ethylene glycol dimethacrylate as the crosslinker. The effects of interaction on the adsorption capacity of the molecularly imprinted polymer(MIP) and non-imprinted polymer(NIP) were investigated. A comparison of the adsorption capacity for MIP and NIP indicated that the NIP had the lowest adsorption capacity. The curcuminoid-imprinted polymer(Cur-MIP) was synthesized from 0.0237 mmol of styrene, 47.0 g of acetonitrile, 1.0238 mmol of ethylene glycol dimethacrylate, 0.0325 mmol of curcuminoids, and 0.2480 mmol of benzoyl peroxide. A high-performance liquid chromatography method with fluorescence detection was developed and validated for various chromatographic conditions for the determination of the curcuminoids in turmeric samples. The sample solution was separated using the Cur-MIP via solid-phase extraction and analyzed on a Brownlee analytical C_(18) column(150 mm ×6 mm, 5 mm) using an isocratic elution consisting of acetonitrile and 0.1%trichloroacetic acid(40:60, v/v). The flow rate was maintained at 1.5 m L/min. The fluorescence detector was set to monitor at λex? 426 nm and λem? 539 nm. The quantification limit values were found to be16.66, 66.66, and 33.33 mg/L for curcumin, demethoxycurcumin, and bisdemethoxycurcumin, respectively. Thus, we concluded that the Cur-MIP and high-performance liquid chromatographic-fluorescence method could be applied to selective extraction and could be used as a rapid tool for the determination of curcuminoids in medicinal herbal extracts. | Wisanu Thongchai Pranom Fukngoen | 2018 | Journal of Pharmaceutical Analysis2018，8，1： | 3 |
| 10 | Controllably Growing Topologies in One-shot RAFT Polymerization via Macro-latent Monomer Strategy显示文摘The controlled and efficient synthesis of polymers with tailored topologies is challenging but important for exploring structure/property research. Herein, we proposed a concept of macro-latent monomer to achieve the controlled growth of polymer topologies.The macro-latent monomer was installed by a dynamic furan/maleimide covalent bond at the chain terminal. One-shot reversible additionfragmentation chain transfer(RAFT) polymerization of styrene and the macro-latent monomer created controlled growth of polymer topologies.Low temperature such as 40 ℃ could not activate the macro-latent monomer and thus the polymerization created the homo-polystyrene. By contrast, high temperature of ~110 ℃ activated the macro-latent monomer, and a maleimide-terminated macro-monomer was released via the retro-Diels Alder reaction. This macro-monomer immediately joined the cross polymerization with styrene and thus produced the side chains. By delicately manipulating the polymerization temperature, the predetermined placement of the macro-latent monomer-derived polymeric sidechains created controllably growing topologies, including star-, π-shaped, and density-variable grafting copolymers. This work paved a new way for creating on-demand topologies and would greatly enrich the topology synthesis. | Liu-Qiao Zhang Yang Gao Zhi-Hao Huang Wei Zhang Nian-Chen Zhou Zheng-Biao Zhang Xiu-Lin Zhu | 2021 | Chinese Journal of Polymer Science2021，39，1： | 3 |
| 11 | Enantioselective Arylcyanation of Styrenes via Copper-Catalyzed Radical Relay显示文摘The first copper-catalyzed enantioselective arylcyanation of styrenes has been developed using readily available anilines as aryl radical precursors under mild conditions,which enables easy access to chiral 2,3-diaryl propionitriles with moderate to good enantiose-lectivities.This operationally straightforward reaction exhibits broad substrate scope and functional group tolerance.Notably,this method has been applied to the synthesis of chiral AlEgen as well as estrogen receptor-B agonist(R)-diarylpropionitrile(DPN). | Weiwen Zhuang Pinhong Chen Guosheng Liu | 2021 | Chinese Journal of Chemistry2021，39，1： | 3 |
| 12 | Controlled Radical Polymerization of Styrene in the Presence of Different Copper Complexes and Organic Halides显示文摘The polymerization behaviors of Styrene (St) in the presence of CuX/L [X=Cl or Br; L= 2,2 bipyridine (bpy), 1,10 phenanthroline (phen) or 4,7 diphenyl 1,10 phenanthroline (DPP) ] and R X (R=trichloromethyl, benzyl or allyl; X=Cl or Br) have been studied and examined. In a CuCl/bpy/RCl/St system, a bimodal GPC peak at the early stage of polymerization was observed, and a concept of multi active species was proposed to explain this phenomenon. In a CuCl/phen (DPP)/RCl/St system, the \%M\%\-n of polystyrene (PS) increased linearly with St conversion and ln[M] o/[M] also increased linearly with time, indicating the living nature of this system. Furthermore, the stability of the propagating active species in a CuBr/phen/RBr/St system is higher than that in the CuBr/phen/RBr/St system. | CHENG Guang lou, HU Chun pu \{**\} and YING Sheng kang (Laboratory of Living Polymerization, East China University of Science and Technology, Shanghai 200237, P.R. China) (Received August 28, 1998) | 1999 | Chemical Research in Chinese Universities1999，15，4： | 2 |
| 13 | Petrochemical Market Annual Report | | 2005 | China Chemical Reporter2005，，24： | 2 |
| 14 | Selective Dealkenylative Functionalization of Styrenes via C-C Bond Cleavage显示文摘As a readily available feedstock,styrene with about 25 million tons of global annual production serves as an important building block and organic synthon for the synthesis of fine chemicals,polystyrene plastics,and elastomers.Thus,in the past decades,many direct transformations of this costless styrene feedstock were disclosed for the preparation of high-value chemicals,which to date,generally performed on the functionalization of styrenes through the allylic C-H bond,C(sp2)-H bond,or the C=C double bond cleavage.However,the dealkenylative functionalization of styrenes via the direct C-C single bond cleavage is so far challenging and still unknown.Herein,we report the novel and efficient C-C amination and hydroxylation reactions of styrenes for the synthesis of valuable aryl amines and phenols via the site-selective C(Ar)-C(alkenyl)single bond cleavage.This chemistry unlocks the new transformation and application of the styrene feedstock and provides an efficient protocol for the late-stage modification of substituted styrenes with the site-directed dealkenylative amination and hydroxylation. | Jianzhong Liu Jun Pan Xiao Luo Xu Qiu Cheng Zhang Ning Jiao | 2020 | Research2020，，1： | 2 |
| 15 | Broad Scope Extra-Annular [4 + 2] Cycloaddition of o-Carboryne with Styrenes: Efficient Route to Carborane-Fused Polycyclics显示文摘o-Carboryne (1,2-dehydro-o-carborane) generated in situ from the precursor 1-OTf-2-Li-o-l,2-C2B10H10 undergoes an efficient extra-annular[4 + 2] cycloaddition with styrenes at room temperature to give a series of carborane-fused polycyciics in good to high isolated yields. This reaction iscompatible with many functional groups and has a very broad substrate scope. Further transformations of the resultant products have been carried out,affording various multi-functionalized o-carboranes. | Jie Zhang Zuowei Xie | 2018 | Chinese Journal of Chemistry2018，36，11： | 2 |
| 16 | HOW DO THE RATES OF HALOPHILIC ATTACKS COMPARE WITH THE RATES OF PROTOPHILIC ATTACKS?显示文摘The measured relative rates of halophilic and protophilic attacks (k_X/k_H) indicate that the rates of halophilic attacks are comparable in magnitude to those of protophilic attacks (deprotonations). | Xing Ya LI, Ming. Hu TU and Xi Kui JIANG~* Shanghai Institute of Organic Chemistry, Academia Sinica, 345 Lingling Lu, Shanghai 200032 | 1993 | Chinese Chemical Letters1993，4，5： | 2 |
| 17 | Synthesis of cationic styrene-acrylic acid ester copolymer emulsion for paper sizing显示文摘Surface sizing is an effective way to increase paper’s water-resistance and printability.The purpose of this study was to study synthesis process to develop an efficient cationic styrene-acrylic acid ester emulsion(SAE)for the surface sizing of paper.Dimethylaminoethyl methacrylate methyl chloride(DMC)was used as the cationic monomer,and cationic starch or native starch was used as the emulsion stabilizer to copolymerize with styrene and butyl acrylate.The results indicated that the SAE synthesized with cationic starch and DMC had a high cationic charge density and a high DMC conversion rate.Paper sized with the cationic SAE had higher surface strength and lower Cobb value than the paper sized with other surface sizing agents such as,anionic SAE,and cationic or oxidized starch.Scanning electron micrographs revealed that the paper sized with a combination of oxidized starch and cationic SAE had smoother surface morphology when compared to the paper sized with oxidized starch alone,or with oxidized starch and anionic SAE. | Xinlei Wu Youjia Cui Yi Jing Joseph Mosseler | 2016 | Journal of Bioresources and Bioproducts2016，1，1： | 1 |
| 18 | Dehydrodimers of arylaldoxime——a convenient source of iminoxy radicals显示文摘Arylaldoxime dehydrodimers 3a—1 have been prepared from the corresponding oximes 1a—1by using (HCrO4)2(Py)4Co as oxidant.Their structures were assigned to be bisnitrone by XPS studies.ESR studies of 3a—1 in hot chloroform show that iminoxy radicals 2a—1 are formed.Therefore thedehydrodimers can provide a convenient source of these radicals. | WEI,Xu-Dong HU,Hong-Wen HU,Yue-Fei Department of Chemistry,Nanjing University,Nanjing 210008JIN,Yong-Shu JIN,Tong-Zheng HAN,Shi-Ying XU,Yun-Xia The Centre of Materials analysis,Nanjing University,Nanjing 210008 | 1992 | Chinese Journal of Chemistry1992，10，4： | 1 |
| 19 | The Effect of Al^(3+), Na^+, NH_4^+ on Ti Content in the Preparation of Ti-ZSM-5显示文摘The effect of Al3+, NH, Na+ on the Ti content in the preparation of Ti-ZSM-5 by the isomorphous substitution of ZSM-5 using gaseous TiCl4 as titanium resource has been investigated. It is surprisingly found that although the direct ratio exists between the Ti content and the content of the skeletal Al: y=0.08x2+0.57x+1.23(here y represents TiO2% and x represents Al2O3%). but the catalytic activities of Ti-ZSM-5 for the oxidation of styrene sharply rise with the decrease of TiO2%. The skeletal Al hinders the Ti incorporation into the framework of molecular sieves characterized by FT-IR technique. At the same . NH ion has no effect on the Ti incorporation. but Na+ ion does. | Cheng Hua XU Shao Jie LU Gui Ying DENG Fa Li QIU (Chengdu Institute of Organic Chemistry. Chinese Academy of Sciences, Chengdu 610041) | 1999 | Chinese Chemical Letters1999，10，8： | 1 |
| 20 | Morphology and crystal-plane effects of Zr-doped CeO2 nanocrystals on the epoxidation of styrene with tert-butylhydroperoxide as the oxidant显示文摘The morphology effect of Zr-doped CeO_2 was studied in terms of their activities in the selective oxidation of styrene to styrene oxide using tert-butyl hydroperoxide as the oxidant. In the present work, Zrdoped CeO_2 nanorods exhibited the highest catalytic performance(yield of styrene oxide and TOF value)followed by nanoparticles and nanocubes. For the Zr-doped CeO_2 nanorods, the apparent activation energy is 56.3 k J/mol, which is much lower than the values of catalysts supported on nanoparticles and nanocubes(73.3 and 93.4 k J/mol). The high resolution transmission electron microscopy results indicated that(100) and(110) crystal planes are predominantly exposed for Zr-doped CeO_2 nanorods while(100)and(111) for nanocubes,(111) for nanoparticles. The remarkably increased catalytic activity of the Zrdoped CeO_2 nanorods is mainly attributed to the higher percentage of Ce^(3+)species and more oxygen vacancies, which are associated with their exposed(100) and(110) crystal planes. Furthermore, recycling studies proved that the heterogeneous Zr-doped CeO_2 nanorods did not lose its initial high catalytic activity after five successive recycles. | Jia Ren Xin Liu Ruihua Gao Wei-Lin Dai | 2017 | Journal of Energy Chemistry2017，26，4： | 1 |
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