壳聚糖的新应用：交联壳聚糖对热塑性聚氨酯防火性能的影响。

The novel application of chitosan: Effects of cross-linked chitosan on the fire performance of thermoplastic polyurethane.

机构信息

State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, PR China.

State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, PR China; State Key Laboratory of Special Functional Waterproof Materials, Beijing, 100029, PR China.

出版信息

Carbohydr Polym. 2018 Jun 1;189:313-321. doi: 10.1016/j.carbpol.2018.02.034. Epub 2018 Feb 12.

DOI:10.1016/j.carbpol.2018.02.034

PMID:29580415

Abstract

In this paper, a novel flame retardant (ACS) was prepared by crosslinking chitosan with bis-(4-formylphenyl)-phenyl-phosphonate (ABPO). ACS in association with ammonium polyphosphate (APP) and organic modified montmorillonite (OMMT) were used to prepare flame retardant thermoplastic polyurethane (TPU) composite through melt blending. For the TPU sample containing 10% flame retardants, the limiting oxygen index was increased from 20.8 to 29.0%, the vertical burning (UL-94) rating was upgraded from no rating to V-0, and the peak heat release rate was decreased from 1090 to 284 kW/m. The thermal gravity analysis (TGA) indicated that ACS had excellent char formation ability and could greatly enhance the thermal stability of TPU. The tensile strength and elongation at break for flame retardant sample could reach 16.5 MPa and 1443% respectively.

摘要

本文通过双(4-醛基苯基)苯基膦酸酯(ABPO)与壳聚糖交联，制备了一种新型阻燃剂(ACS)。将 ACS 与聚磷酸铵(APP)和有机改性蒙脱土(OMMT)一起通过熔融共混制备阻燃热塑性聚氨酯(TPU)复合材料。对于含 10%阻燃剂的 TPU 样品，其极限氧指数从 20.8 提高到 29.0%，垂直燃烧等级从无评级提高到 V-0，峰值放热率从 1090kW/m 降低到 284kW/m。热重分析(TGA)表明 ACS 具有优异的炭化形成能力，可以显著提高 TPU 的热稳定性。阻燃样品的拉伸强度和断裂伸长率分别可达 16.5MPa 和 1443%。