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Crystallization, mechanical, thermal and rheological properties of polypropylene composites reinforced by magnesium oxysulfate whisker
Dang, Li1,2,3; Nai, Xue-ying2; Liu, Xin2; Zhu, Dong-hai2; Dong, Ya-ping2; Li, Wu1,2
2017-05-01
发表期刊CHINESE JOURNAL OF POLYMER SCIENCE
卷号35期号:5页码:659-671
文章类型Article
摘要Polypropylene (PP) composites containing magnesium oxysulfate whisker (MOSw) or lauric acid (LA) modified MOSw (LAMOSw) were prepared via melt mixing in a torque rheometer. The heterogeneous nucleating effect of LAMOSw was clearly observed in polarized light microscopy (PLM) pictures with the presence of an abundance of small spherulites. MOSw exhibited no nucleation effect and formed a few spherulites with large size. Compared with PP/MOSw composites, PP/LAMOSw exhibited better impact strength, tensile strength and nominal strain at break, ascribing to three possible reasons: (i) more beta-crystal PP formed, (ii) better dispersity of LAMOSw in PP matrix and (iii) the plasticizing effect of LA. The results of dynamic mechanical thermal analysis (DMTA) indicated that brittleness of the PP matrix at low temperature was improved by the addition of LAMOSw, while the interfacial interactions between MOSw and PP matrix were actually weakened by LA, as evidenced by the higher tan delta values over the entire range of test temperatures. In terms of the rheological properties of the composites, both the eta* and G' at low frequencies increase with the addition of MOSw or LAMOSw, indicating that the PP matrix was transformed from liquid-like to solid-like. However, a network of whiskers did not form because no plateau was found in the G' at low frequencies. With low filler content, LAMOSw produced a stronger solid-like behavior than MOSw mainly due to the better dispersion of the LAMOSw in PP matrix. However, for highly-filled composites, the eta* of PP/LAMOSw at low frequencies was smaller than that of PP/MOSw composite, since the particle-particle contact effect played a major role.
关键词Pp/mosw Composites Crystallization Thermal Properties Mechanical Properties Rheological Properties
WOS标题词Science & Technology ; Physical Sciences
关键词[WOS]SULFATE HYDRATE WHISKER ; ISOTACTIC POLYPROPYLENE ; FIRE PERFORMANCE ; NANOCOMPOSITES ; BEHAVIOR ; PARTICLES ; CELLULOSE ; RUBBER ; MORPHOLOGY ; DISPERSION
收录类别SCI
语种英语
WOS研究方向Polymer Science
WOS类目Polymer Science
WOS记录号WOS:000396124100008
引用统计
文献类型期刊论文
条目标识符http://ir.isl.ac.cn/handle/363002/6207
专题青海盐湖研究所知识仓储
盐湖资源综合利用工程技术中心
作者单位1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Salt Lake Resources Chem, Xining 810008, Peoples R China
2.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Comprehens & Highly Efficient Utilizat Sa, Xining 810008, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714
Dang, Li,Nai, Xue-ying,Liu, Xin,et al. Crystallization, mechanical, thermal and rheological properties of polypropylene composites reinforced by magnesium oxysulfate whisker[J]. CHINESE JOURNAL OF POLYMER SCIENCE,2017,35(5):659-671.
APA Dang, Li,Nai, Xue-ying,Liu, Xin,Zhu, Dong-hai,Dong, Ya-ping,&Li, Wu.(2017).Crystallization, mechanical, thermal and rheological properties of polypropylene composites reinforced by magnesium oxysulfate whisker.CHINESE JOURNAL OF POLYMER SCIENCE,35(5),659-671.
MLA Dang, Li,et al."Crystallization, mechanical, thermal and rheological properties of polypropylene composites reinforced by magnesium oxysulfate whisker".CHINESE JOURNAL OF POLYMER SCIENCE 35.5(2017):659-671.
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