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| 1 | 线性脂环族聚酰胺化学结构对其力学和光学性能的影响显示文摘以重复单元结构不同的3种线性脂环族聚酰胺(LATPA)材料为研究对象,通过核磁共振谱、红外光谱、热分析、X射线衍射等技术,研究了链结构单元的侧基、端基对材料聚集态结构的影响,并对比研究了不同聚集态结构材料的宏观力学性能和光学透明性差异,建立了链结构、聚集态结构与力学性能、光学性能的关系.研究发现,侧基带来的大空间位阻降低了LATPA的结晶度,提高了材料的玻璃化转变温度;较长的柔性端基分子链有助于高分子链的有序规整排列,可生成尺寸很小的微晶;聚集态结构直接影响材料的力学和光学性能,无定形LATPA和含有微晶结构的LATPA都具有良好的光学透明性,前者的透明性更高,后者的综合力学性能更好. | 周臣旭 董思远 朱平 刘继广 董侠 王笃金 | 2021 | 高分子学报2021，52，3： | 0 |
| 2 | Time and Temperature Dependence of the Structural Evolution for Polyamide 1012显示文摘The rheological property evolution of polyamide 1012(PA1012)in the isothermal process in molten state has been investigated.The results show that the viscosity increases and crosslinking reaction occurs simultaneously together with the increase of temperature,thus causing the variation of storage modulus(G')and loss modulus(G')in the repeated frequency sweeps with residual time.This research has pointed out that the superposition is valid for monitoring the complex behavior composed of the viscosity increasing and crosslink occurring process by tracing the variation behavior of the crossover points of G'and G'with time,revealing the same time-temperature dependence of the two reactions in the isothermal process.A normalized master curve has been proposed to describe the melt behavior at a given temperature. | Xin-Ran Liu Yu Wang Li-Yuan Liu Xia Dong Du-Jin Wang | 2020 | Chinese Journal of Polymer Science2020，38，9： | 0 |
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