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在固化过程中阐明RTV弹性体埋藏界面的分子结构变化

Ting Lin, Yuchen Wu, Elizabeth Santos¹

¹Dow Performance Silicones, Auburn, Michigan 48611, United States.

Langmuir : the ACS journal of surfaces and colloids

|March 5, 2024

概括

基质基团,而不是水分,驱动RTV固化和粘附. 表面处理以去除这些群体显著影响的界面行为和粘合强度.

科学领域:

材料科学材料科学材料科学
表面化学表面化学
聚合物科学聚合物科学

背景情况:

室温化 (RTV) 弹性体是重要的工业材料.
RTV的凝结固化涉及影响材料性质的分子转变.
基组在RTV固化中的确切作用,特别是在接口上,仍然不清楚.

研究的目的:

为了研究在RTV固化过程中的界面分子结构变化.
为了确定RTV/基板接口上的活性基团的起源.
为了将接口化学与粘附性能相关联.

主要方法:

使用总频率生成 (SFG) 振动光谱仪用于现场,非破坏性分析.
在固化过程中检查了RTV配方在埋藏的接口.
研究了基质化对界面基团的影响.

主要成果:

确定了基质表面基团作为初始固化反应的主要来源.
证明了基质的化消除了界面基团.
观察到基组存在/不存在对的界面行为和粘附的显著影响.

结论:

基质基团对于RTV界面反应和粘附至关重要.
SFG光谱是固化系统实时界面分析的强大工具.
了解界面化学可以带来改进的粘合剂配方.

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