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热参数对二次热成型过程中聚乙烯硫化物 (PPS) 自核化行为的影响

Yi Ren^1,2, Zhouyang Li¹, Xinguo Li^1,2

¹State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Shanghai Collaborative Innovation Center of High-Performance Fibers and Composites (Province-Ministry Joint), Key Laboratory of High-Performance Fibers & Products, Ministry of Education, Center for Civil Aviation Composites, Donghua University, Shanghai 201620, China.

Materials (Basel, Switzerland)

|February 24, 2024

概括

碳纤维增强的聚烯硫化物 (CF/PPS) 复合材料在热循环期间表现出自我核化 (SN). 控制加热速率和化温度优化了二次热成型的结晶.

科学领域:

材料科学材料科学材料科学
聚合物科学聚合物科学
复合材料复合材料复合材料

背景情况:

碳纤维增强的聚烯硫化物 (CF/PPS) 对于航空航天应用至关重要.
二次热成型需要精确控制聚合物矩阵的结晶行为.
聚烯硫化物 (PPS) 在热循环过程中表现出独特的自我核化 (SN),影响复合材料的性能.

研究的目的:

调查热参数对SN和PPS在两个热周期中的非同热结晶的影响.
了解冷却速率,加热速率和融化温度如何影响PPS结晶.
确定控制CF/PPS复合材料融记忆效应的策略.

主要方法:

差分扫描热量计 (DSC) 用于研究PPS结晶.
在两个热循环中对各种热参数进行系统的研究.
分析自我核化行为和非异热晶体化动力学.

主要成果:

第二个热循环中的冷却速度没有影响SN的行为.
在加热过程中状化细化了状结构,并改变了SN域形成温度范围.
同时控制加热速率和融温度是管理第一周期融记忆效应的关键.

结论:

合作控制加热速率和融化温度影响晶体形态,结晶温度和结晶速率在两个热循环.
这项研究提供了一种新的方法,用于在二次热成型过程中管理热塑复合材料矩阵结晶.
优化SN行为对于提高CF/PPS复合材料在航空航天应用中的性能至关重要.

关键词:

非同热结晶的非同热结晶.硫化聚烯硫化的使用情况二次热成型二次热成型自核化的自我核化.

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