聚1-丁烯釜内合金的微观结构及其对性能的影响

Microstructure and Its Effect on the Properties of Poly(1-butene)Alloys Within Reactor

对采用TiCl_4/MgCl_2-A1Et3体系制备的聚1-丁烯釜内合金的微观结构进行了表征,通过核磁共振碳谱结果计算出聚1-丁烯釜内合金中丙烯结构单元的含量。差示扫描热仪(DSC)分析表明,丙烯结构单元增加可使聚1-丁烯釜内合金从熔体中冷却结晶时,直接生成热力学稳定的晶型I,其结晶度也随之增加。力学性能测试结果表明,聚1-丁烯釜内合金的拉伸强度和弯曲模量均随丙烯结构单元含量的增加而升高。

The microstructure of poly（1-butene） alloys within reactor obtained by TIC14/MgC12- A1Eta cat- alyst system was tested by 13C NMR. The propylene unit content was calculated by the results of laC NMR. Differential scanning Calorimeter data showed that with a certain content of propylene unit the poly（1-butene） alloy within reactor formed thermodynamic stable Form I directly while crystallized from melt. The crystallinity of poly（1-butene） alloy within reactor increased with the propylene unit content. Mechanical properties results showed that the tensile strength and bending modulus increased with increas- ing of propylene units in the alloys.