Effects of shell thickness of polystyrene-encapsulated Mg(OH)(2) on flammability and rheological properties of high-impact polystyrene composites

doi:10.1002/pi.2249

CORC > 化学研究所 > 中国科学院化学研究所

	Effects of shell thickness of polystyrene-encapsulated Mg(OH)(2) on flammability and rheological properties of high-impact polystyrene composites
	Chang, Suqin ; Xie, Tingxiu ; Yang, Guisheng
刊名	POLYMER INTERNATIONAL
	2007-09-01
卷号	56 期号:9 页码:1135-1141
关键词	High-impact Polystyrene Magnesium Hydroxide Morphology Flammability Rheological Proper-ties Cone Calorimetry
ISSN号	0959-8103
DOI	10.1002/pi.2249
英文摘要	Polystyrene (PS)-encapsulated magnesium hydroxide (Mg(OH)(2)) particles with various shell thicknesses were successfully prepared using a method of in situ polymerization of styrene in a high-speed mixer. High-impact polystyrene (HIPS)/Mg(OH)(2) composites were prepared by melt blending. They were characterized using cone calorimetry, horizontal burning rate, rheology and scanning electron microscopy in order to investigate the effects of the shell thickness of the PS-encapsulated Mg(OH)(2) on the flame retardancy and rheological properties of the resulting composites. Rheological tests showed that the composites containing encapsulated Mg(OH)(2) had a stronger solid-like response at low frequency than that of the sample containing untreated Mg(OH)(2). However, with PS/Mg(OH)(2) ratio increasing up to 6.0 wt% and above, the dynamic viscosity, loss modulus and storage modulus of HIPS/Mg(OH)(2) composites decreased. The optimum PS/Mg(OH)(2) ratio, 4.5 wt%, was determined using a new 'crossover point' rheological method. The combustion tests showed that compared to the composites containing untreated Mg(OH)(2), the fire retardancy of the composites containing PS-encapsulated Mg(OH)(2) was improved significantly. Also, there appeared to be a critical PS/Mg(OH)(2) ratio, namely 6.0 wt%, for optimum flame-retarding properties. However with the continuous increase of PS/Mg(OH)(2) ratio, the fire resistance of the composites declined somewhat, which can be explained by acceleration of combustion of the composites due to the introduction of free PS chains of low molecular weight on the surface of Mg(OH)(2). (c) 2007 Society of Chemical Industry.
语种	英语
出版者	JOHN WILEY & SONS LTD
WOS记录号	WOS:000248495700008
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/61385]
专题	中国科学院化学研究所
通讯作者	Chang, Suqin
作者单位	1.Chinese Acad Sci, Inst Chem, Joint Lab Polymer Sci & Mat, CAS Key Lab Engn Plast, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Shanghai Genius Adv Mat Co Ltd, R&D Ctr, Shanghai 201109, Peoples R China
推荐引用方式 GB/T 7714	Chang, Suqin,Xie, Tingxiu,Yang, Guisheng. Effects of shell thickness of polystyrene-encapsulated Mg(OH)(2) on flammability and rheological properties of high-impact polystyrene composites[J]. POLYMER INTERNATIONAL,2007,56(9):1135-1141.
APA	Chang, Suqin,Xie, Tingxiu,&Yang, Guisheng.(2007).Effects of shell thickness of polystyrene-encapsulated Mg(OH)(2) on flammability and rheological properties of high-impact polystyrene composites.POLYMER INTERNATIONAL,56(9),1135-1141.
MLA	Chang, Suqin,et al."Effects of shell thickness of polystyrene-encapsulated Mg(OH)(2) on flammability and rheological properties of high-impact polystyrene composites".POLYMER INTERNATIONAL 56.9(2007):1135-1141.