线性低密度聚乙烯
材料科学
结晶
聚乙烯
微观结构
共聚物
聚合物混合物
高分子化学
聚合物
延伸率
复合材料
化学工程
极限抗拉强度
工程类
作者
Ying Wang,Shangfeng Wu,Li‐Zhi Liu,Hao Chen,Yuanxia Wang,Lixin Song,Ying Shi
出处
期刊:Journal of Polymer Engineering
[De Gruyter]
日期:2023-12-08
卷期号:44 (1): 23-33
被引量:1
标识
DOI:10.1515/polyeng-2023-0167
摘要
Abstract Focusing on the study of the phase separation behavior of triblock copolymer and linear low-density polyethylene (LLDPE) systems helps to understand the influence of microstructure on the properties of poly(vinylcyclohexane)-b- poly(ethylene)-b-poly(vinylcyclohexane) (PVCH-PE-PVCH/LLDPE) blends. We prepared a series of blends of LLDPE and PVCH-PE-PVCH and explained their compatibility from the microstructure. The research findings indicate that despite having similar block compositions, PVCH-PE-PVCH with a higher molecular weight exhibits significantly stronger phase separation and crystallization ability compared to PVCH-PE-PVCH with lower molecular weight. In PVCH-PE-PVCH/LLDPE blends, the addition of 10 %, 20 %, and 30 % LLDPE induces earlier crystallization and crystal phase separation of polyethylene (PE) fragments. In addition, compared to the lower molecular weight of PVCH-PE-PVCH, the higher molecular weight of PVCH-PE-PVCH exhibits a higher tendency for independent crystallization and shows significant crystal phase separation during the cooling crystallization process when blended with LLDPE. The PE segments in the lower molecular weight of PVCH-PE-PVCH can more easily enter the nanoscale domain of LLDPE. Impact fracture electron microscopy also reveals better compatibility between the lower molecular weight of PVCH-PE-PVCH and LLDPE compared to the higher molecular weight of PVCH-PE-PVCH. Furthermore, the blends of lower molecular weight of PVCH-PE-PVCH and LLDPE exhibit a greater growth rate in elongation at break.
科研通智能强力驱动
Strongly Powered by AbleSci AI