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无形塑性聚乙烯 (Vinyl Butyral) 的多尺度放松行为

Changzhu Lv^1,2, Hang Guo^1,2, Erjie Yang^1,2

¹National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230026, China.

Macromolecular rapid communications

|June 21, 2023

概括

塑化聚乙 (PVB) 呈现出拉伸诱导的相分离. 这项研究使用超小角度X射线散射 (USAXS) 和双折射研究了它的多尺度放松行为,揭示了链段和键的贡献.

科学领域:

材料科学材料科学材料科学
聚合物物理聚合物物理
纳米技术纳米技术

背景情况:

塑化聚乙 (PVB) 是层状玻璃中一个重要的抗冲击聚合物.
最近的研究揭示了使用超小角度X射线散射 (USAXS) 的纳米尺度PVB的拉伸诱导相位分离.
了解PVB的放松行为对于优化其性能至关重要.

研究的目的:

为了研究塑化PVB在变形下的多尺度放松行为.
探索宏观应力,中观结构和微观链动态之间的关系.
阐明链段和结集群在PVB放松中的作用.

主要方法:

结合的超小角度X射线散射 (USAXS) 和双断度测量.
利用现场拉伸装置研究变形动力学.
在宏观,中观和微观尺度上分析了放松行为.

主要成果:

在变形的塑化PVB中观察并描述了多尺度放松现象.
在纳米尺度上证明了拉伸诱导的相隔结构的形成.
确定了聚合物链段和键集群对放松过程的贡献.

结论:

塑化PVB的多尺度放松行为是复杂的,涉及不同结构层次的贡献.
美国XS和双折是探测这些现象的有效技术.
了解这些放松机制对于设计用于层玻璃应用的先进PVB材料至关重要.

关键词:

多层次的放松放松方式聚乙烯 (Poly (Vinyl) 乙烯) 是一种聚乙烯.由拉伸引起的相位分离.超小角度的X射线散射.

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