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Process for controlling morphology and improving thermal- mechanical performance of high performance interpenetrating and semi- interpenetrating polymer networks
Process for controlling morphology and improving thermal- mechanical performance of high performance interpenetrating and semi- interpenetrating polymer networks
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机译：高性能互穿和半互穿聚合物网络的形态控制和提高热机械性能的方法
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摘要
In the process of the present invention, a non-polar, aprotic solvent is removed from an oligomer/polymer solution by freeze-drying in order to produce IPNs and semi-IPNs. By thermally quenching the solution to a solid in a short length of time, the size of the minor constituent- rich regions is greatly reduced as they are excluded along with the major constituent from the regions of crystallizing solvent. The use of this process sequence of controlling phase morphology provides IPNs and semi- IPNs with improved fracture toughness, microcracking resistance, and other physical-mechanical properties as compared to IPNs and semi-IPNs formed when the solvent is evaporated rather than sublimed.
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