Synergistic effect between expandable graphite and ammonium polyphosphate on flame retarded polylactide

被引：150

作者：

Zhu, Hongfang ^{[1
]}

Zhu, Qiliang ^{[1
]}

Li, Juan ^{[1
]}

Tao, Kang ^{[1
]}

Xue, Lixin ^{[1
]}

Yan, Qing ^{[1
]}

机构：

[1] Chinese Acad Sci, Ningbo Key Lab Polymer Mat, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China

来源：

POLYMER DEGRADATION AND STABILITY | 2011年 / 96卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Polylactide; Expandable graphite; Ammonium polyphosphate; Synergistic effect; Flame retardant; THERMAL-PROPERTIES; FLAMMABILITY; FIRE; DEGRADATION; COMPOSITES; MECHANISM; RETARDATION; HYDROXIDE; BEHAVIOR; APP;

D O I：

10.1016/j.polymdegradstab.2010.11.017

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Synergistic effect was observed between expandable graphite (EG) and ammonium polyphosphate (APP) on flame retarded polylactide (PIA) in this paper using limiting oxygen index (LOI), thermal gravimetric analysis (TGA), scanning electron microscopy (SEM) and X-ray spectroscopy (XPS) and cone calorimeter tests etc. In the experiments, RA composites with 15 wt% of APP/EG(1:3) combinations showed a LOI value of 36.5 and V-0 rating in UL-94 tests, greatly improved flame retardant properties from composites with APP or EG alone. Results from TGA and cone calorimeter demonstrated that APP/EG combination could retard the degradation of polymeric materials above the temperature of 520 degrees C by promoting the formation of a compact char layer. This char layer protects the matrix effectively from heat penetrating inside and prevents its further degradation, resulting in lower weight loss rate and better flame retarded performance. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：183 / 189

页数：7

共 33 条

[1] Toughening polylactide [J].