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	Effect of nano-calcium carbonate/pimelic acid bicomponent nucleating agent on polypropylene microporous membranes prepared via thermally induced phase separation
	Luo Benzhe ; Zhang Jun ; Wang Xiaolin ; Wen Jianzhi
	2010-05-07 ; 2010-05-07 ; OCT
关键词	nano-CaCO3 pimelic acid nucleating agent thermally induced phase separation polypropylene microporous membrane ISOTACTIC POLYPROPYLENE CRYSTALLIZATION BEHAVIOR Polymer Science
中文摘要	Polypropylene (PP) microporous membranes were prepared with the composite diluents of soybean oil and di-n-butyl-phthalate (DBP) via thermally induced phase separation (TIPS). The effects of nano-CaCO3 nucleating agent and nano-CaCO3/pimelic acid bicomponent nucleating agent on the crystalline morphology and melting behaviors of the PP/soybean oil/DBP system, and on the microstructure of PP membrane were investigated. The experimental results showed that with addition of 0% similar to 4% single nano-CaCO3 nucleating agent the peak temperature of melting curve of PP in PP/soybean oil/DBP system varied from 150.7 degrees C to 151.3 degrees C while the peak melting temperature of pure PP is 165 degrees C. The differential scanning calorimetry (DSC) showed that the addition of bicomponent nucleating agent nano-CaCO3 (1% similar to 4%) and pimelic acid (0.5 %) induced two peaks on the melting curve. Wide-angle X-ray diffraction (WAXD) measurements proved that PP formed beta-phase and alpha-phase with addition of bicomponent nucleating agent nano-CaCO3 (1% similar to 4%) and pimelic acid (0.5 %) while the addition of single nano-CaCO3 nucleating agent resulted in only PP crystals of alpha-phase,which was consistent with the results of DSC. The addition of single nano-CaCO3 nucleating agent in PP/soybean oil/DBP system had unremarkable effect,on the morphology of PP membrane. While nano-CaCO3/pimelic acid (1 % /0.5 %) bicomponent nucleating agent was used, the PP microporous membrane showed smaller and regular pores. When the nano-CaCO3/pimelic acid content was 2%/0.5% and 4%/0.5%, PP microporous membrane showed more tiny irregular spherulites, as well as larger pores, which were related to the formation of beta phase.
语种	中文 ; 中文
出版者	SCIENCE CHINA PRESS ; BEIJING ; 16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/17364]
专题	清华大学
推荐引用方式 GB/T 7714	Luo Benzhe,Zhang Jun,Wang Xiaolin,et al. Effect of nano-calcium carbonate/pimelic acid bicomponent nucleating agent on polypropylene microporous membranes prepared via thermally induced phase separation[J],2010, 2010, OCT.
APA	Luo Benzhe,Zhang Jun,Wang Xiaolin,&Wen Jianzhi.(2010).Effect of nano-calcium carbonate/pimelic acid bicomponent nucleating agent on polypropylene microporous membranes prepared via thermally induced phase separation..
MLA	Luo Benzhe,et al."Effect of nano-calcium carbonate/pimelic acid bicomponent nucleating agent on polypropylene microporous membranes prepared via thermally induced phase separation".(2010).

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