writer：Wei Jiang, Haojun Liang, Jilin Zhang, Dayong He, Bingzheng Jiang
keywords：brittle-ductile transition, particle size, impact strength, polymer blends, toughening
source：期刊
specific source：Journal of Applied Polymer Science, 1995, 58(3): 537-539
Issue time：1995年

摘要：本文研究了粒子尺寸对聚合物共混物冲击强度的影响。提出了基于临界粒子尺寸的脆韧转变判据。结果表明，存在一个增韧的临界粒子尺寸：当橡胶粒子尺寸低于该临界值时，共混物表现出韧性断裂，具有高冲击强度；当粒子尺寸超过该临界值时，发生脆性断裂。实验结果与理论预测吻合良好。该研究为增韧聚合物共混物的设计和优化提供了重要的理论指导。

Abstract: The effect of particle size on impact strength of polymer blends with ductile fracture was studied. A criterion for the brittle-ductile transition was proposed based on the critical particle size concept. The results show that there exists a critical particle size for toughening: when the rubber particle size is below this critical value, the blend exhibits ductile fracture with high impact strength; when the particle size exceeds this critical value, brittle fracture occurs. The experimental results are in good agreement with the theoretical predictions. This study provides important theoretical guidance for the design and optimization of toughened polymer blends.

论文链接：https://onlinelibrary.wiley.com/doi/10.1002/app.1995.070580307