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Micro-mechanism on Interfacial Functions in Polymer Matrix Composites

聚合物基复合材料界面功能的微观机制

基本信息

批准号：
11450256
负责人：
IKUTA Nobuo
金额：
$ 6.66万
依托单位：
Shonan Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11450256/
关键词：
Composite Interfaces Silane Coupling Agents Glass Fiber Composites Thermal GC Analysis Microscopic FTIR Microdroplet Test Resin Denaturation Silane Condensation 複合材料プラスチック強化繊維表面処理界面強化界面領域

项目摘要

In order to clarify interfacial functions in polymer matrix composites, molecular and mechanical evaluation was employed mainly using micro-composite with silane-treated glass fiber. Both evaluations gave the relations between the structural interphase and the interfacial functions.Microscopic FTIR was used for the molecular evaluation while microdroplet and pull out tests was employed for the micro-mechanical evaluation. The unidirectional rod-like micro-composite with 2 mm - 8 mm in diameter was made up to know the macro-mechanical properties. In addition, crack propagation or whitening length was measured to see the relation between interfacial reinforcement and mechanical properties.Using the above evaluation with both molecular analysis and mechanical test, the following results was given : First, the role of film former was found to depend on the interaction between silane molecules and film former and on the interaction between film former and matrix resin. Second, an optimal condensation of silane polycondensates improved the interfacial reinforcement. Physical silane condensates enhanced the mechanical property of matrix resin. Last, such silane condensates, however, raise the mechanical property in the case of unidirectional composites. This disagreement was possible to be interpreted in terms of the length of whitening that occurred as crack propagation during bending test.

为了弄清聚合物基复合材料中的界面功能，主要采用硅烷处理玻璃纤维微复合材料进行了分子和力学评价。两种评价方法都给出了界面结构与界面功能之间的关系。微观FTIR用于分子评价，微滴和拉拔试验用于微观力学评价。制备了直径为2 mm~8 mm的单向棒状微观复合材料，以了解其宏观力学性能。结合分子分析和力学性能测试，得出以下结论：第一，成膜剂的作用取决于硅烷分子与成膜剂之间的相互作用以及成膜剂与基质树脂之间的相互作用。其次，硅烷缩聚产物的最佳缩合改善了界面增强。物理硅烷缩合物提高了基质树脂的力学性能。最后，这种硅烷缩合物提高了单向复合材料的力学性能。这种不一致可以用弯曲试验中裂纹扩展时出现的白化长度来解释。