BRITTLE-DUCTILE TRANSITION OF POLYMERS AND ITS PERCOLATION MODEL  

作　　者：Wei Jiang Li-jia An Bing-zheng Jiang State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences, Changchun 130022, China 

出　　处：《Chinese Journal of Polymer Science》2003年第2期129-134,共6页高分子科学（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China (50073023, 20074037, 29704008, 20023003 and 50027001), the Special Funds for Major Basic Research Projects (G1999064800), and the funds for excellent youth of Jilin Province. Chi

摘　　要：The brittle-ductile transition (BDT) of particlc toughened polymers was extensively studied in terms ofmorphology, strain rate, and temperature. The calculation results showed that both the critical interparticle distance (ID_c) andthe brittle-ductile transition temperature (T_(BD)) of polymers were a function of strain rate. The ID_c reduced nonlinearly withincreasing strain rate, whereas T_(BD) increased considerably with increasing strain rate. The effects of temperature andplasticizer concentration on BDT were discussed using a percolation model. The results were in agreement with theexperiments.The brittle-ductile transition (BDT) of particlc toughened polymers was extensively studied in terms ofmorphology, strain rate, and temperature. The calculation results showed that both the critical interparticle distance (ID_c) andthe brittle-ductile transition temperature (T_(BD)) of polymers were a function of strain rate. The ID_c reduced nonlinearly withincreasing strain rate, whereas T_(BD) increased considerably with increasing strain rate. The effects of temperature andplasticizer concentration on BDT were discussed using a percolation model. The results were in agreement with theexperiments.

关 键 词：Particle toughening polymers Brittle-ductile transition PERCOLATION 

分 类 号：O631.3[理学—高分子化学]