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Mechanical and flame retardant properties of isotactic polypropylene/magnesium oxysulfate whisker composite
Dang, Li1,2,3; Nai, Xueying2; Liu, Xin2; Zhu, Donghai2; Dong, Yaping2; Li, Wu1
2018-04-01
Source PublicationJOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
Volume31Issue:4Pages:514-534
SubtypeArticle
AbstractIsotactic polypropylene (iPP) composites containing magnesium oxysulfate whisker (MOSw) or lauric acid-modified MOSw (LA-MOSw) were prepared via melt mixing in a torque rheometer. Scanning electron microscopy pictures showed that the interface between MOSw and iPP matrix was defined, whereas a vague interface was seen in the iPP-LA-MOSw composites. Mechanical properties of these two groups of composites were investigated in terms of tensile, notched impact, and flexural behavior aspects for the purposes of studying toughening effect of MOSw and LA-MOSw. Tensile results showed that yield strength of composites further reduced with the presence of LA, indicating the decrease in interfacial interaction bewteen iPP matrix and MOSw. As such, LA-MOSw performed better than MOSw in toughening of iPP matrix. Flexural strength and modulus of iPP-MOSw composites increased sharply with the increase in MOSw content, while less dependence on the LA-MOSw content indicated that MOSw was deemed beneficial to increase the stiffness. In addition, flammability properties were investigated by cone calorimetry experiment. The results showed that the peak heat release rate apparently reduced with addition of MOSw or LA-MOSw. Besides, iPP-LA-MOSw composites showed higher specific extinction area values than iPP-MOSw composites, which meant the weaker smoke suppression effect of LA-MOSw. It was chiefly because of the incomplete combustion caused by the continuous and complete charred (MgO) shield. The presence of LA was another possible reason.
KeywordMagnesium Oxysulfate Whisker Mechanical Properties Toughness Stiffness Flame Retardant
WOS HeadingsScience & Technology ; Technology
WOS KeywordCRYSTALLIZATION BEHAVIOR ; FIRE PERFORMANCE ; NANOCOMPOSITES ; BLENDS ; DEPENDENCE ; MORPHOLOGY ; CELLULOSE
Indexed BySCI
Language英语
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Composites
WOS IDWOS:000429887800006
Citation statistics
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/6451
Collection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
Affiliation1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Salt Lake Resources Chem, Xining 810008, Qinghai, Peoples R China
2.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Comprehens & Highly Efficient Utilizat Sa, Xining, Qinghai, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Dang, Li,Nai, Xueying,Liu, Xin,et al. Mechanical and flame retardant properties of isotactic polypropylene/magnesium oxysulfate whisker composite[J]. JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS,2018,31(4):514-534.
APA Dang, Li,Nai, Xueying,Liu, Xin,Zhu, Donghai,Dong, Yaping,&Li, Wu.(2018).Mechanical and flame retardant properties of isotactic polypropylene/magnesium oxysulfate whisker composite.JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS,31(4),514-534.
MLA Dang, Li,et al."Mechanical and flame retardant properties of isotactic polypropylene/magnesium oxysulfate whisker composite".JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS 31.4(2018):514-534.
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