Microencapsulation of bisneopentyl glycol dithiopyrophosphate and its flame retardant effect on polyvinyl alcohol

被引：32
作者：
Chen, Wanlu [1 ]
Fu, Xingwei [2 ]
Ge, Weibing [1 ]
Xu, Jianjun [1 ]
Jiang, Mengjin [1 ]
机构：
[1] Sichuan Univ, Coll Polymer Sci & Engn, State Key Lab Polymer Mat & Engn, Chengdu 610065, Sichuan, Peoples R China
[2] China Bluestar Chengrand Chem Co Ltd, Chengdu 610041, Peoples R China
来源：
POLYMER DEGRADATION AND STABILITY | 2014年 / 102卷
关键词：
Bisneopentyl glycol dithiopyrophosphate; Melamine formaldehyde resin; Microcapsule; Polyvinyl alcohol; Flame retardant; AMMONIUM POLYPHOSPHATE; MELAMINE; PENTAERYTHRITOL; DEGRADATION; PYROLYSIS; CELLULOSE; MECHANISM; SORPTION;
D O I：
10.1016/j.polymdegradstab.2014.02.004
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Bisneopentyl glycol dithiopyrophosphate (DDPS) has been successfully microencapsulated with melamine formaldehyde (MF) resin as a shell material by in-situ polymerization process in this study. Chemical structures of DDPS and microencapsulated DDPS (MDDPS) were characterized by Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). Morphologies were investigated by scanning electron microscopy (SEM), while particle size and distribution were investigated by granulometry. The results show that microencapsulation can make DDPS particles be coated by MF resin entirely. After microencapsulation, the mean diameter of DDPS increased slightly from 1.405 mu m to 2.757 mu m, DDPS and MDDPS both were applied in polyvinyl alcohol (PVA) films to compare their flame retardancy. The flame retardation property was evaluated by limiting oxygen index (LOI). Decomposition mechanism was investigated by TG-FTIR, FTIR and SEM. The results indicated that MDDPS has better flame retardancy to PVA, and the LOI of MDDPS/PVA composite is 31.8%. As a fire retardant for PVA, DDPS mainly functions in the gaseous phase rather than in the condensed phase, while MDDPS works in both the gaseous and condensed phase. (c) 2014 Elsevier Ltd. All rights reserved.
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页码：81 / 87
页数：7
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