化工学报 ›› 2024, Vol. 75 ›› Issue (7): 2688-2699.DOI: 10.11949/0438-1157.20240168
齐琪1,2(), 郭利平2, 石李明1,3(
), 郑映2,3(
), 潘鹏举2,3
收稿日期:
2024-02-05
修回日期:
2024-05-12
出版日期:
2024-07-25
发布日期:
2024-08-09
通讯作者:
石李明,郑映
作者简介:
齐琪(1999—),女,硕士研究生,22160349@zju.edu.cn
Qi QI1,2(), Liping GUO2, Liming SHI1,3(
), Ying ZHENG2,3(
), Pengju PAN2,3
Received:
2024-02-05
Revised:
2024-05-12
Online:
2024-07-25
Published:
2024-08-09
Contact:
Liming SHI, Ying ZHENG
摘要:
基于聚丙烯(PP)均聚物和不同乙烯含量的PP共聚物,系统地研究了山梨醇类成核剂含量和乙烯单元含量对PP的结晶动力学、结晶结构、结晶形貌、透明性和力学性能的影响,并通过流变行为分析了成核剂在降温过程中的自组装行为。结果表明,PP的结晶、透明性和力学性能依赖于成核剂含量和乙烯单元含量。当成核剂含量增加到0.1% (质量分数)时,显著加快PP均聚物和共聚物的结晶速率,提高结晶度,提高材料的刚性。然而,乙烯单元含量的增加使PP的结晶速率减慢,降低结晶度,降低材料的刚性。乙烯单元和成核剂的加入都促进PP γ晶的形成,而且γ晶的相对含量随乙烯单元和成核剂含量的增加而增加。增加乙烯单元和成核剂含量也提高PP的透明性。
中图分类号:
齐琪, 郭利平, 石李明, 郑映, 潘鹏举. 山梨醇类成核剂改性聚丙烯及其共聚物的结晶行为与性能[J]. 化工学报, 2024, 75(7): 2688-2699.
Qi QI, Liping GUO, Liming SHI, Ying ZHENG, Pengju PAN. Crystallization behavior and properties of polypropylene and its copolymers modified with sorbitol nucleating agents[J]. CIESC Journal, 2024, 75(7): 2688-2699.
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