Isothermal Crystallization Behavior of EPDM/PP Thermoplastic Vulcanizates by Crosslinking of Peroxide

被引：0
|
作者：
Gao P. [1 ]
Wang Q. [2 ]
Song G. [3 ]
Zhang A. [1 ]
Zhou T. [1 ]
Hou H. [3 ]
Wu J. [1 ]
机构：
[1] State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu
[2] Methanol Branch of Ningxia Coal Industry Group Co., Ltd. of Shenhua Group, Yinchuan
[3] Shanghai Originaldow Advanced Compounds Co., Ltd., Shanghai
来源：
Wu, Jianxun (wwx-ffd@vip.sina.com) | 1600年 / Sichuan University卷 / 33期
关键词：
Dynamic vulcanization; EPDM/PP; Isothermal crystallization; Thermoplastic dynamic vulcanizate;
D O I：
10.16865/j.cnki.1000-7555.2017.08.014
中图分类号：
学科分类号：
摘要：
The isothermal crystallization behavior of PP, PP/peroxide, EPDM/PP and EPDM/PP thermoplastic dynamic vulcanizate (TPV) was characterized by DSC. The results show that the simple blending with EPDM reduces the crystallization rate and crystallinity of PP, the crosslinked EPDM particles using peroxide as heterogeneous nucleating agent greatly increase the crystallizing rate of PP but seriously reduced the crystallinity of PP. The Avrami index of TPV is 3.5, consistenting with the three-dimensional spherical growth of heterogeneous nucleation. X-ray diffraction shows that the crystal structures of the four samples are identical and remain the α-type monoclinic crystals. The melting curve shows that the peroxide/PP and TPV exhibit an additional melting peak at 153℃, the intensity of which increases gradually with rise of the crystallization temperature. The melting behavior of TPV was studied by moving window two related infrared, and the melting peak at 153℃ corresponds to helical sequence structures of 10 and 5 monomeric units and at 160℃ corresponds to helical sequence structures of 12 monomeric units. The low crystallization temperature contributes to formation of the long helical sequence structure and improvement of the crystallinity of PP. © 2017, Editorial Board of Polymer Materials Science & Engineering. All right reserved.
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页码：73 / 78and84
页数：7811
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