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首页> 外文期刊>Journal of Applied Polymer Science >Facile synthesis of ethylene-propylene fully alternating copolymer and comparison with random copolymer of similar composition
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Facile synthesis of ethylene-propylene fully alternating copolymer and comparison with random copolymer of similar composition

机译：乙烯 - 丙烯完全交替共聚物的体积合成及其与类似组成的无规共聚物的比较

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摘要

A precisely sequenced ethylene-propylene (EP) fully alternating copolymer was synthesized via trans-1,4-polymerization of isoprene catalyzed by Ziegler-Natta catalyst followed by hydrogenation. This EP copolymer was used as model polymer for studying structure-property relationship. An ethylene-propylene random copolymer (ethylene-propylene rubber [EPR]) with similar ethylene content was also prepared for comparison, and the effect of comonomer sequence distribution on properties was investigated. The copolymer chain structures were monitored by H-1 and C-13 NMR and Fourier translation infrared. Differential scanning calorimetry, thermogravimetric analysis, dynamic mechanical analysis, and tensile tests were employed to determine the thermal and mechanical properties. The fully alternating copolymer EP gives a more precise glass transition comparing than EPR. Further understanding on thermal properties and aggregation behavior of ethylene-propylene copolymers is made possible by this comparative study. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45816.
机译：通过Ziegler-Natta催化剂催化的异戊二烯的反式-1,4聚合，合成精确测序的乙烯 - 丙烯（EP）完全交替的共聚物，然后通过氢化催化。该EP共聚物用作研究结构性质关系的模型聚合物。还制备了具有相似乙烯含量的乙烯 - 丙烯无规共聚物（乙烯 - 丙烯橡胶[EPR]）进行比较，研究了共聚单体序列分布对性质的影响。通过H-1和C-13 NMR和傅立叶翻译红外线监测共聚物链结构。采用差示扫描量热，热重分析，动态力学分析和拉伸试验来确定热和机械性能。完全交替的共聚物EP提供比EPR更精确的玻璃转换。通过该比较研究可以进一步了解乙烯 - 丙烯共聚物的热性能和聚集行为。 （c）2017 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,45816。

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