| A New Criterion for Brittle-Ductile Transition of Polymer Blends |
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| 引用本文： | 郑文革,漆宗能,施良和. A New Criterion for Brittle-Ductile Transition of Polymer Blends[J]. 中国科学B辑(英文版), 1993, 0(8) |
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| 作者姓名： | 郑文革 漆宗能 施良和 |
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| 作者单位： | State Key Laboratory of Engineering Plastics，Institute of Chemistry，Academia Sinica，Beijing 100080，PRC，State Key Laboratory of Engineering Plastics，Institute of Chemistry，Academia Sinica，Beijing 100080，PRC，State Key Laboratory of Engineering Plastics，Institute of Chemistry，Academia Sinica，Beijing 100080，PRC |
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| 基金项目： | Project supported by the National Natural Science Foundation of China. |
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| 摘 要： | The T_c criterion was first used by S. Wu for characterizing the brittleductile (B-D) transition of N6/EPDM blends. But in this paper, a new criterion which is based on the stress analysis of blends is proposed to characterize the B-D transitions of blends, namely, A criterionV_(fc) and d_c are the critical volume fractions and particle size of dispersed particles in blends, respectively. For given blends, A is independent of the morphology of dispersed phase and is only the characteristic parameter of matrix. The B-D transitions of different blends, including polar N6/EPDM blends, nonpolar PP/EPDM blends and PE/CaCO_3 composites, were manipulated with A criterion and satisfactory results were obtained. In addition, a new master curve for the impact strength of PP/EPDM blends versus V_f~2/d was obtained. The results showed that A criterion is more suitable than T_c criterion for characterizing the B-D transition of blends.
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A New Criterion for Brittle-Ductile Transition of Polymer Blends |
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| ZHENG Wen-Ge QI Zong-Neng SHI Liang-He. A New Criterion for Brittle-Ductile Transition of Polymer Blends[J]. Science in China(Chemistry), 1993, 0(8) |
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| Authors: | ZHENG Wen-Ge QI Zong-Neng SHI Liang-He |
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| Abstract: | The T_c criterion was first used by S. Wu for characterizing the brittleductile (B-D) transition of N6/EPDM blends. But in this paper, a new criterion which is based on the stress analysis of blends is proposed to characterize the B-D transitions of blends, namely, A criterionV_(fc) and d_c are the critical volume fractions and particle size of dispersed particles in blends, respectively. For given blends, A is independent of the morphology of dispersed phase and is only the characteristic parameter of matrix. The B-D transitions of different blends, including polar N6/EPDM blends, nonpolar PP/EPDM blends and PE/CaCO_3 composites, were manipulated with A criterion and satisfactory results were obtained. In addition, a new master curve for the impact strength of PP/EPDM blends versus V_f~2/d was obtained. The results showed that A criterion is more suitable than T_c criterion for characterizing the B-D transition of blends. |
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| Keywords: | polymer blends brittle-ductile transition stress analysis A criterion. |
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