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基于三聚氰胺-没食子酸络合物的无卤阻燃生物基聚酰胺1010

Bio-Based Polyamide 1010 with a Halogen-Free Flame Retardant Based on Melamine-Gallic Acid Complex.

作者信息

Levinta Nicoleta, Corobea Mihai Cosmin, Vuluga Zina, Nicolae Cristian-Andi, Gabor Augusta Raluca, Raditoiu Valentin, Osiac Mariana, Teodorescu George-Mihail, Teodorescu Mircea

机构信息

National Institute for Research & Development in Chemistry and Petrochemistry-ICECHIM, 202 Spl. Independentei, 060021 Bucharest, Romania.

Faculty of Applied Chemistry and Materials Science, Politehnica University of Bucharest, 1-7 Polizu Street, s1, 01106 Bucharest, Romania.

出版信息

Polymers (Basel). 2020 Jul 2;12(7):1482. doi: 10.3390/polym12071482.

DOI:10.3390/polym12071482
PMID:32630673
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7407098/
Abstract

This work aims at developing polyamide 1010 (PA1010) composites with improved fire behavior using a halogen-free flame-retardant system based on melamine (Me) and gallic acid (GA) complexes (MA). The MA complexes were formed by hydrogen bonding, starting from 1:2, 1:1, 2:1 Me:GA molar ratios. PA1010 composites were obtained by melt mixing, followed by compression molding. MA provided a plasticizing effect on the PA1010 matrix by decreasing the glass transition temperature. The influence of MA on PA1010 chain packaging was highlighted in the X-ray diffraction patterns, mainly in the amorphous phase, but affected also the α and γ planes. This was reflected in the dynamic mechanical properties by the reduction of the storage modulus. H-bonds occurrence in MA complexes, improved the efficiency in the gaseous form during fire exposure, facilitating the gas formation and finally reflected in thermal stability, thermo-oxidative stability, LOI results, and vertical burning behavior results. PA1010 containing a higher amount of GA in the complex (MA12) displayed a limiting oxygen index (LOI) value of 33.6%, much higher when compared to neat PA1010 (25.8%). Vertical burning tests showed that all the composites can achieve the V-0 rating in contrast with neat PA1010 that has V-2 classification.

摘要

这项工作旨在使用基于三聚氰胺（Me）和没食子酸（GA）配合物（MA）的无卤阻燃体系来开发具有改进燃烧性能的聚酰胺1010（PA1010）复合材料。MA配合物通过氢键形成，起始的Me:GA摩尔比为1:2、1:1、2:1。PA1010复合材料通过熔融共混，然后压缩成型获得。MA通过降低玻璃化转变温度对PA1010基体产生增塑作用。MA对PA1010链堆积的影响在X射线衍射图谱中得到突出体现，主要在非晶相中，但也影响α和γ平面。这在动态力学性能方面表现为储能模量的降低。MA配合物中氢键的存在，提高了火灾暴露期间气态形式的效率，促进了气体的形成，最终反映在热稳定性、热氧化稳定性、极限氧指数结果和垂直燃烧行为结果上。在配合物中含有较高含量GA的PA1010（MA12）的极限氧指数（LOI）值为33.6%，与纯PA1010（25.8%）相比要高得多。垂直燃烧测试表明，与具有V-2等级的纯PA1010相比，所有复合材料都能达到V-0等级。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4d2c/7407098/a54dbbedfd85/polymers-12-01482-g010.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4d2c/7407098/682322d18dca/polymers-12-01482-g008.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4d2c/7407098/837db5b84369/polymers-12-01482-g006.jpg
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