Morphology and Mechanical Properties of Binary Blends of Polypropylene with Statistical and Block Ethylene-Octene Copolymers
Morphology and Mechanical Properties of Binary Blends of Polypropylene with Statistical and Block Ethylene-Octene Copolymers
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聚丙烯与统计和嵌段乙烯-辛烯共聚物二元共混物的形态和机械性能
DOI：
10.1002/app.33035
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发表时间：
2011-03
影响因子：
3
通讯作者：
Wang, Dujin
中科院分区：
文献类型：
--
作者：
Liu, Guoming;Zhang, Xiuqin;Liu, Chenyang;Chen, Hongyu;Walton, Kim;Wang, Dujin
收稿日期：2010年3月2日;接受日期：2010年7月7日DOI 10.1002/app.33035在线发表日期：2010年8月30日Wiley Online Library（wileyonlinelibrary.com）.摘要：本文选用密度和堆积度相近的无规（EOCs）和嵌段（OBC）乙烯-辛烯共聚物作为等规聚丙烯（iPP）的抗冲改性剂，并比较了两种弹性体的增韧效果。EOCs的粘度曲线与具有等效熔体流动速率（MFR）的OBCs的粘度曲线相似，从而可以将粘度比和弹性体类型作为独立变量进行比较。热分析表明，不同共混物中iPP基体的晶型和结晶完整性没有明显差异。形态学观察表明，OBC形成的分散畴比具有相似磁共振频率的EOCs小。所有研究的聚丙烯/弹性体共混物的弯曲模量、屈服应力、断裂应力和断裂应变均表现出相同的变化趋势。但iPP/OBC共混物的室温冲击韧性高于含弹性体的iPP/EOC共混物，且两者的MFR相近。实验结果表明，iPP/OBC的相容性远高于iPP/EOCs。
Received 2 March 2010; accepted 7 July 2010DOI 10.1002/app.33035Published online 30 August 2010 in Wiley Online Library (wileyonlinelibrary.com).ABSTRACT: In the present work, statistical (EOCs) andblock (OBCs) ethylene-octene copolymers, with similardensities and crystallinities, were used as impact modifiersof isotactic polypropylene (iPP), and the toughening effectsof these two types of elastomers were compared. The vis-cosity curves of EOCs were similar to those of OBCs withequivalent melt flow rate (MFR), enabling a comparison ofthe viscosity ratio and elastomer type as independent vari-ables. No distinct differences on the crystal forms andcrystal perfection of iPP matrix in various blends wereobserved by thermal analysis. Morphological examinationshowed that OBCs form smaller dispersed domains thanEOCs with similar MFRs. The flexural modulus, yieldstress, stress and strain at break showed the same varia-tion tendency for all the investigated polypropylene/elas-tomer blends. However, the room temperature Izodimpact toughness of iPP/OBC blend was higher than thatof iPP/EOC blend containing elastomer with the similarMFRs. The experimental results indicated that the compat-ibility of iPP/OBCs was much higher than that of iPP/EOCs.
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影响因子：
4.6
作者：
Xiao-Qi Zhou;J. N. Hay
通讯作者：
Xiao-Qi Zhou;J. N. Hay
影响因子：
3.2
作者：
B. Jang;D. Uhlmann;J. B. Sande
通讯作者：
B. Jang;D. Uhlmann;J. B. Sande
影响因子：
4.6
作者：
W.C.J. Zuiderduin;C. Westzaan;H. Huetink;R. J. Gaymans
通讯作者：
W.C.J. Zuiderduin;C. Westzaan;H. Huetink;R. J. Gaymans
DOI：
10.1002/pol.1983.180210503
发表时间：
1983-05
期刊：
Journal of Polymer Science Part B
影响因子：
--
作者：
Souheng Wu
通讯作者：
Souheng Wu
影响因子：
4.6
作者：
K. Nitta;Yong-Woo Shin;H. Hashiguchi;S. Tanimoto;M. Terano
通讯作者：
K. Nitta;Yong-Woo Shin;H. Hashiguchi;S. Tanimoto;M. Terano