Crystallization, mechanical, thermal and rheological properties of polypropylene composites reinforced by magnesium oxysulfate whisker

CORC > 青海盐湖研究所 > 中国科学院青海盐湖研究所 > 青海盐湖研究所知识仓储

	Crystallization, mechanical, thermal and rheological properties of polypropylene composites reinforced by magnesium oxysulfate whisker
	Dang, Li 1,2,3; Nai, Xue-ying 2; Liu, Xin 2; Zhu, Dong-hai 2; Dong, Ya-ping 2; Li, Wu 1,2
刊名	CHINESE JOURNAL OF POLYMER SCIENCE
	2017-05-01
卷号	35 期号:5 页码:659-671
关键词	Pp/mosw Composites Crystallization Thermal Properties Mechanical Properties Rheological Properties
文献子类	Article
英文摘要	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.
WOS关键词	SULFATE HYDRATE WHISKER ; ISOTACTIC POLYPROPYLENE ; FIRE PERFORMANCE ; NANOCOMPOSITES ; BEHAVIOR ; PARTICLES ; CELLULOSE ; RUBBER ; MORPHOLOGY ; DISPERSION
WOS研究方向	Polymer Science
语种	英语
WOS记录号	WOS:000396124100008
内容类型	期刊论文
源URL	[http://ir.isl.ac.cn/handle/363002/6207]
专题	青海盐湖研究所_青海盐湖研究所知识仓储青海盐湖研究所_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.