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| 1 | 生物基合成橡胶的研究进展显示文摘进入21世纪以来,石油基合成橡胶的发展不可持续,且日益受到节能减排的压力;天然橡胶面临气候、疫病等因素的影响,产量有限,而且我国天然橡胶自给不足,严重依赖进口。面对上述挑战,以太阳能为源头,开发不依赖于化石资源的新一代生物基橡胶,是解决橡胶资源短缺的有效手段,也是保证全球橡胶资源安全、长久、稳定供应的必由之路。目前,主要有两种思路制备生物基合成橡胶,本文针对两类生物基合成橡胶的研究进展进行综述,一种是生物质发酵得到的生物基单体(如乙醇等)进一步转化为传统单体(如乙烯等),再通过传统的合成工艺制备出生物基乙丙橡胶、生物基异戊橡胶等生物基传统橡胶,其性能与传统非生物基工程弹性体几乎完全相同,可以直接替代现有工程橡胶;另一种是利用现有生物基化学品,如衣康酸、丙二醇、丁二酸等,通过聚合反应制备新型结构的生物基橡胶材料,其原料易得,成本较低,随着发酵技术的快速发展,将出现越来越多的生物基化学品可以进行选择和使用,生物基合成橡胶具有光明的发展前景。 | 吉海军 乔荷 王朝 杨慧 王润国 张立群 | 2019 | 材料工程2019，47，12： | 5 |
| 2 | A Non-isocyanate Route to Poly(ester urethane) with High Molecular Weight: Synthesis and Effect of Chemical Structures of Polyester-diol显示文摘A series of non-isocyanate linear high molecular weight poly(ester urethane)s(PETUs)were prepared through an environmentallyfriendly route based on dimethyl carbonate,1,6-hexanediol and 1,6-hexanediamine.In this route,the polyurethane diol was first prepared by the reaction between bis-1,6-hexamethylencarbamate(BHC)and 1,6-hexanediol.A series of polyester soft segments of polyurethane have been synthesized from the polycondensation of adipic acid and different diols,including butanediol,hexanediol,octanediol and decanediol.The subsequent polycondensation of polyurethane diol and polyester diol led to linear PETUs.The resultant polymers were characterized by GPC,FTIR,^(1)H-NMR,^(13)C-NMR,DSC,WAXD,TGA and tensile test.The results indicated that PETUs possess weight-average molecular weights higher than 1×10^(5) and the tensile strength as high as 10 MPa.The thermal properties,crystallization behavior,microphase separation behavior and morphology were studied by DSC and AFM,and the results indicated that the degree of phase separation was affected by two factors,the crystallization and hydrogen bonding interaction between soft segment and hard segment. | Zi-Yun Shen Qi-Yong Mei Yi Liu Liu-Chun Zheng Chun-Cheng Li Jia-Jian Liu Yao-Nan Xiao Shao-Hua Wu Bo Zhang | 2022 | Chinese Journal of Polymer Science2022，40，1： | 0 |
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