writer：姜伟, 梁浩钧, 张吉林, 何大勇, 姜炳政
keywords：brittle-ductile transition, percolation model, polymer blends, toughening, critical matrix ligament thickness
source：期刊
specific source：高分子学报, 2003
Issue time：2003年

摘要：本文综述了聚合物脆韧转变的渗流模型研究进展。基于逾渗理论，提出了聚合物共混物脆韧转变的临界条件，即当分散相粒子间的基体层厚度达到某一临界值时，共混物发生脆韧转变。该渗流模型成功预测了多种聚合物共混体系（如PP/EPDM、PP/POE等）的脆韧转变行为，模型预测与实验结果吻合良好。该研究为橡胶增韧塑料的理论研究提供了重要的理论框架，对高性能聚合物共混材料的设计具有重要的指导意义。

Abstract: The brittle-ductile transition of polymers and its percolation model are reviewed. Based on percolation theory, the critical condition for brittle-ductile transition of polymer blends was proposed. This percolation model successfully predicts the brittle-ductile transition behavior of various polymer blend systems, including PP/EPDM and PP/POE. The model predictions are in good agreement with experimental results.