| A DYNAMIC MECHANICAL ANALYSIS STUDY OF THE TRANSITION BEHAVIOUR OF I-PP/EPDM BLENDS |
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| 作者姓名： | 董丽松 庄宇纲 李诗春 冯之榴 |
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| 作者单位： | Polymer Physics Laboratory，Changchun Institute of Applied Chemistry，Academia Sinica，Changchun，130022，Polymer Physics Laboratory，Changchun Institute of Applied Chemistry，Academia Sinica，Changchun，130022，Polymer Physics Laboratory，Changchun Institute of Applied Chemistry，Academia Sinica，Changchun，130022，Fomerly E.I.L.Voong and Voong Tse-Lieu |
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| 基金项目： | This Paper was presented before the Symposium on Polymers,Chengdu,P.R.China.Nov,14-18,1989 |
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| 摘 要： | The transition behaviour of the blends of isotactic polypropylene (i-PP) with ethylene-propylene terpolymer (EPDM) containing 42 wt% propylene was investigated by dynamic mechanical analysis technique (DMA). Owing to its high propylene content, EPDM is compatible with i-PP to some degree. The interaction between the two components was strengthened. As expected, for partially compatible system the glass transition temperature of i-PP in the blends shifted to lower temperature. It was found that there existed two transitions, αEPDM and βEPDM, for the EPDM used in this work. The former was considered to be the glass transition of the random chain segments of EPDM, while the latter the local motion of the long ethylene sequences in EPDM. The unusual transition behaviour of αEPDM in the blends was explained in terms of the greater thermal expansion of EPDM and the compatibility of the two components. On the other hand, the βEPDM changed with the composition of the blends in a regular manner.
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| 收稿时间： | 1990-03-22 |
A DYNAMIC MECHANICAL ANALYSIS STUDY OF THE TRANSITION BEHAVIOUR OF I-PP/EPDM BLENDS* |
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| DONG Lisong,ZHUANG Yugang,LI Shichun,FENG Zhiliu.A DYNAMIC MECHANICAL ANALYSIS STUDY OF THE TRANSITION BEHAVIOUR OF I-PP/EPDM BLENDS[J].Chinese Journal of Polymer Science,1992,0(1):15-19. |
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| Authors: | DONG Lisong ZHUANG Yugang LI Shichun FENG Zhiliu |
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| Institution: | Polymer Physics Laboratory; Changchun Institute of Applied Chemistry; Academia Sinica; Changchun; Fomerly E.I.L.Voong and Voong Tse-Lieu |
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| Abstract: | The transition behaviour of the blends of isotactic polypropylene (i-PP) with ethylene-propylene terpolymer (EPDM) containing 42 wt% propylene was investigated by dynamic mechanical analysis technique (DMA). Owing to its high propylene content, EPDM is compatible with i-PP to some degree. The interaction between the two components was strengthened. As expected, for partially compatible system the glass transition temperature of i-PP in the blends shifted to lower temperature. It was found that there existed two transitions,αEPDM and βEPDM,for the EPDM used in this work.The former was condidered to be the glass transition of the random chain segments of EPDM,while the latter the local motion of the long ethylene sequences in EPDM.The unusual transition behaviour of αEPDM in the blends was explained in terms of the greater thermal expansion of EPDM and the compatibility of the two components.On the other hand,the βEPDM changed with the composition of the blends in a regular manner. |
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| Keywords: | Dynamic mechanical analysis Transition behaviour Compatibility Isotactic polypropylene Ethylene-propylene terpolymer Polymer blend |
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