Crystallization Morphology and Behavior of Polypropylene Composites Containing Microencapsulated Flame Retardant

被引:5
作者
Wu, Kun [1 ]
Shen, Min-Min [1 ]
Hu, Yuan [2 ]
Ji, Hong-Guo [1 ]
机构
[1] Chinese Acad Sci, Key Lab Cellulose & Lignocellulos Chem, Guangzhou Inst Chem, Guangzhou 510650, Guangdong, Peoples R China
[2] Univ Sci & Technol China, State Key Lab Fire Sci, Hefei, Anhui, Peoples R China
来源
JOURNAL OF MACROMOLECULAR SCIENCE PART B-PHYSICS | 2011年 / 50卷 / 08期
关键词
ammonium polyphosphate; crystallization; microencapsulation; nucleation; polypropylene; AMMONIUM POLYPHOSPHATE;
D O I
10.1080/00222348.2010.518894
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
With shells of melamine-formaldehyde (MF), urea-melamine-formaldehyde (UMF), or poly(vinyl alcohol)-melamine-formaldehyde (VMF), microencapsulated ammonium polyphosphate (APP) was prepared by in-situ polymerization for use as a flame retardant in polypropylene (PP). Microencapsulated APP showed rougher surface, smaller size, and narrower size distribution compared with APP. The results of polarized optical microscopy (POM) showed that the additives resulted in a decrease of the spherulite size and less perfection in crystal geometry of PP composites. Due to the interaction and alignment of the PP polymer chains at the surface, the surface modification of APP influenced the formation and further development of PP crystals remarkably. The crystallization and melting behaviors of the PP composites were affected by the rough surface of the microencapsulated APP, which was helpful for the formation of beta-crystals and decreased the crystal growth rate compared with APP.
引用
收藏
页码:1508 / 1520
页数:13
相关论文
共 13 条
[1]   Fire retardant polymers: recent developments and opportunities [J].
Bourbigot, Serge ;
Duquesne, Sophie .
JOURNAL OF MATERIALS CHEMISTRY, 2007, 17 (22) :2283-2300
[2]   Effects of Magnesium Hydroxide and Its Surface Modification on Crystallization and Rheological Behaviors of Polypropylene [J].
Chen, Xiaolang ;
Yu, Jie ;
Guo, Shaoyun ;
Luo, Zhu ;
He, Min .
POLYMER COMPOSITES, 2009, 30 (07) :941-947
[3]   Thermal and fire behaviour of ammonium polyphosphate/acrylic coated cotton/PESFR fabric [J].
Drevelle, C ;
Lefebvre, J ;
Duquesne, S ;
Le Bras, M ;
Poutch, F ;
Vouters, M ;
Magniez, C .
POLYMER DEGRADATION AND STABILITY, 2005, 88 (01) :130-137
[4]  
Feng Y, 1999, J APPL POLYM SCI, V72, P1559, DOI 10.1002/(SICI)1097-4628(19990620)72:12<1559::AID-APP8>3.0.CO
[5]  
2-F
[6]  
JONES TA, 1964, MAKROMOL CHEM, V75, P134
[7]   On the deformation mechanisms of β-polypropylene:: 1.: Effect of necking on β-phase PP crystals [J].
Li, JX ;
Cheung, WL .
POLYMER, 1998, 39 (26) :6935-6940
[8]   Preparation and nonisothermal crystallization behavior of polypropylene/layered double hydroxide nanocomposites [J].
Lonkar, Sunil P. ;
Morlat-Therias, S. ;
Caperaa, N. ;
Leroux, F. ;
Gardette, J. L. ;
Singh, R. P. .
POLYMER, 2009, 50 (06) :1505-1515
[9]   Micro encapsulated ammonium polyphosphate with urea-melamine-formaldehyde shell: preparation, characterization, and its flame retardance in polypropylene [J].
Wu, Kun ;
Wang, Zhengzhou ;
Hu, Yuan .
POLYMERS FOR ADVANCED TECHNOLOGIES, 2008, 19 (08) :1118-1125
[10]   Microencapsulation of ammonium polyphosphate: Preparation, characterization, and its flame retardance in polypropylene [J].
Wu, Kun ;
Wang, Zhengzhou ;
Liang, Haojun .
POLYMER COMPOSITES, 2008, 29 (08) :854-860