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玻璃刷弹性体聚 (二甲基) 的粘附和机械性能

Hyemin Kim¹, James J Watkins¹, Alfred J Crosby¹

¹Department of Polymer Science and Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003, USA. watkins@polysci.umass.edu.

|July 5, 2023

概括

聚二甲基) 瓶刷弹性体 (BBEs) 具有可调节的粘附力,独立于交叉连接密度. 它们独特的结构比线性网络提供了较低的粘附能量和速度依赖性,使得定制应用成为可能.

科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学
表面科学是一门学科.

背景情况:

聚二甲基) 瓶刷弹性体 (BBEs) 是具有可调整散装机械性能的先进软材料.
BBE的表面和界面粘附特性仍然未得到充分研究.
了解粘附对于优化 BBE 应用至关重要.

研究的目的:

为了研究PDMS BBEs对玻璃的粘附.
确定关键能量释放率 (Gc) 作为分离速度的函数.
为了阐明BBE结构对粘附性质的影响.

主要方法:

使用接触粘附测试来测量Gc.
在一系列的界面分离速度中分析了粘附.
使用缩放分析来解释消散性放松机制.

主要成果:

BBEs的初始粘附能量 (G0) 是独立于交叉连接密度的.
与线性聚合物网络相比,BBE的Gc显著降低,速度依赖性降低.
在BBE中,更快的消散放松机制被确定为关键因素.

结论:

PDMS BBEs对玻璃的粘附主要由侧链单体化学控制.
通过控制单体化学和侧链长度,BBE提供可调节的粘附特性.
这些发现为设计具有特定界面性能的BBE为各种应用开辟了道路.

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