Microencapsulation of ammonium phosphate with a polyurethane shell part 1: Coacervation technique

被引：109

作者：

Saihi, D

Vroman, I

Giraud, S

Bourbigot, S

机构：

[1] ENSAIT, UPRES EA2461, Lab Genie & Mat Text, F-59056 Roubaix, France

[2] Lab Procedes Elaborat Revetements Fonct, UPRES EA1040, F-59652 Villeneuve Dascq, France

来源：

REACTIVE & FUNCTIONAL POLYMERS | 2005年 / 64卷 / 03期

关键词：

microencapsulation; di-ammonium hydrogen phosphate; particle size distribution; FTIR spectroscopy; solid state NMR; thermal analysis;

D O I：

10.1016/j.reactfunctpolym.2005.05.004

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Polyurethane-phosphate combination is a novel intumescent flame retardant system. However, because of the water solubility and migration of phosphate, the intumescent system is not permanent. This problem might be solved by the technique of microencapsulation. Two types of microcapsules of di-ammonium hydrogen phosphate (DAHP) with, respectively, gelatin-polyurea shell and poly(vinyl alcohol)-polyurethane shell were synthesized. Chemical and physical structures of the DAHP microcapsules were characterized. Thermal degradation of the DAHP microcapsules exhibits characteristics of an intumescent system. Thus, it is expected that the microcapsules might be useful for improving the reaction to fire of various polymers. (C) 2005 Elsevier B.V. All rights reserved.

引用

页码：127 / 138

页数：12

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