Studies on the Mechanism of Thermal Decomposition of Unsaturated Polyester Resins with Reduced Flammability

IF 2.1 4区材料科学 Q2 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Polymers & Polymer Composites Pub Date : 2004-02-01 DOI:10.1177/096739110401200204

E. Kicko-Walczak

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引用次数: 11

Abstract

The thermal decomposition of halogenated unsaturated polyester resins (UPRs), flame retarded by zinc hydroxystannate and cross-linked with styrene, has been investigated by thermogravimetry (TG) in both dynamic and isothermal mode, and by TG coupled on-line with Fourier transform infra red spectroscopy (TG-FTIR) or mass spectroscopy (TG-MS). The data from TG analysis show that degradation proceeds in two steps for unmodified as well as modified UPR, but the char residue at 500°C was considerably higher for flame-retarded resins. Analysis of the volatile decomposition products by FT-IR and MS spectrocopy revealed that during controlled heating, the emission of phthalic anhydride takes place at ca. 330°C, followed by styrene at ca. 380°C., and a complex mixture of other aromatic compounds are evolved. Further studies by TG-FTIR revealed that evolution of CO 2 is considerably lowered by zinc hydroxystannate, andat a later stage of decomposition the evolution of H 2 O and HBr (traces) can be identified. On the basis of the results obtained a mechanism of decomposition was proposed that takes into account the reaction of tin compounds with the products of ester linkage rupture processes.

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降低可燃性不饱和聚酯树脂热分解机理的研究

采用热重法(TG)和傅立叶变换红外光谱(TG- ftir)或质谱法(TG- ms)对羟基锡酸锌阻燃和苯乙烯交联的卤代不饱和聚酯树脂(UPRs)的热分解进行了动态和等温模式的研究。TG分析数据表明，未改性UPR和改性UPR的降解分两步进行，但阻燃树脂在500°C时的炭渣要高得多。通过FT-IR和MS对挥发性分解产物的分析表明，在控制加热过程中，邻苯二酸酐在330℃左右释放，苯乙烯在380℃左右释放。和其他芳香族化合物的复杂混合物。进一步的TG-FTIR研究表明，羟基锡酸锌大大降低了CO 2的演化，并且在分解后期可以确定H 2 O和HBr(痕量)的演化。在此基础上，提出了考虑锡化合物与酯链断裂产物反应的分解机理。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Polymers & Polymer Composites 工程技术-材料科学：表征与测试

CiteScore

4.30

自引率

9.50%

发文量

审稿时长

5.7 months

期刊介绍： Polymers & Polymer Composites provides a forum for the publication of expertly peer reviewed, international research into the following topics: - Fibre reinforced and particulate filled plastics - Engineering plastics - Nanocomposites - Polymers or polyblends intended for engineering use (including structural, load bearing electronic and electrical applications) - Fibre reinforced and particulate filled plastics - Structural adhesives - Textile & wood fibres - Biomaterials with a load bearing capacity, (including polymer based dental materials)