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混合星和triblock共聚物对热塑性弹性体的形态和机械性质的非线性影响

Max G Schußmann¹, Leonardo Rocha Dias¹, Simon Buchheiser²

¹Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstraße 18, 76131, Karlsruhe, Germany.

Macromolecular rapid communications

|May 19, 2025

概括

混合线性和星形块共聚合物调整热塑性弹性体的特性. 恒星共聚合物增强延长和强度,混合物特性取决于恒星含量的非线性.

科学领域:

聚合物科学聚合物科学
材料科学材料科学材料科学
纳米技术纳米技术

背景情况:

热塑性弹性体 (TPE) 需要对各种应用进行性能调整.
块共聚合物为设计材料特性提供了多功能途径.
线性和星形架构呈现出不同的机械行为.

研究的目的:

调查混合线性SIS三块共聚物与对称星形PS-PI块共聚物对机械性能的影响.
探索这些混合物的形态演变和由此产生的机械性能.
了解混合架构的TPE中的结构-属性关系.

主要方法:

通过阳离子聚合和接种技术合成线性SIS三块共聚物和星形PS-PI块共聚物.
使用小角度X射线散射 (SAXS) 和原子力显微镜 (AFM) 的形态特征.
机械性能评估,包括破裂时的延长 (εb) 和最终抗拉强度 (σUTS).

主要成果:

观察到状长距离顺序 (L0) 与恒星含量 (φstar) 的非线性依赖.
与线性SIS相比,星形共聚合物表现出明显增强的机械性能.
混合物的机械性能显示出复杂的依赖性:在恒星含量较低时,延伸度得到改善,强度降低,随后在恒星含量较高时强度增加.

结论:

混合线性和星形块共聚合物为热塑性弹性体的机械性能提供了一个可调节的平台.
不同架构之间的相互作用导致了独特的,非添加性的机械反应.
精心控制恒星含量,可以解和优化特定的机械性能,如强度和延长.

关键词:

混合物混合物混合物区块共聚合物区块共聚合物复杂的拓是复杂的拓.机械性能机械性能机械性能阶段分离的分离阶段分离.

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