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首页> 外文期刊>Polymer international >A novel phosphorus-containing copolyester with low melting temperature and high flame retardancy
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A novel phosphorus-containing copolyester with low melting temperature and high flame retardancy

机译：低熔点，高阻燃性的新型含磷共聚酯

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BACKGROUND: The increasing uses of non-woven fabrics need the development of a kind of novel flame-retardant polyester with low melting temperature. Neopentyl glycol (NPG) and 3-(hydroxyphenylphosphinyl)propionic acid (HPPPA) were used as the third and fourth comonomer to synthesize phosphorus-containing poly[(ethylene terephthalate)-co-(neopentyl terephthalate)] (PENT) with both flame retardancy and low melting temperature.RESULTS: The chemical structure of PENT was confirmed using Fourier transform infrared, ~1H NMR, ~(13)C NMR and ~(31)P NMR spectroscopy. PENT displays a monomodal gel permeation chromatography curve. When the content of NPG was kept at 10 wt% and the content of HPPPA increased to 5 wt%, the melting temperature (T_m) of the resulting PENT5/10 decreases to 171.2 °C, a 34.6 °C decrease compared to that of PENTO/10 (containing no HPPPA). The flammability of the PENTs was characterized with the limiting oxygen index (LOI) test, the UL-94 vertical test and the cone calorimeter test. The incorporation of HPPPA can significantly improve the flame retardancy of the PENTs, the LOI values of the PENTs increasing from 24.4 to 37.6, as the loading of HPPPA increases from 0 to 5 wt%.CONCLUSION: The PENTs possess both low melting temperatures and excellent flame retardancy. HPPPA can be used as fourth comonomer to improve the flame retardancy of the PENTs, while decreasing the T_m value of the copolyester.
机译：背景：非织造布的日益广泛的使用需要开发一种新型的低熔点阻燃聚酯。使用新戊二醇（NPG）和3-（羟苯基亚膦酰基）丙酸（HPPPA）作为第三和第四共聚单体，合成具有阻燃性的含磷聚[（对苯二甲酸乙二酯）-共-（对戊二酸新戊酯）]（PENT）结果：使用傅里叶变换红外光谱，〜1H NMR，〜（13）C NMR和〜（31）P NMR光谱确认了PENT的化学结构。 PENT显示单峰凝胶渗透色谱曲线。当NPG的含量保持在10 wt％且HPPPA的含量增加到5 wt％时，所得PENT5 / 10的熔融温度（T_m）降低至171.2°C，与PENTO相比降低34.6°C / 10（不包含HPPPA）。 PENT的可燃性通过极限氧指数（LOI）测试，UL-94垂直测试和锥形量热仪测试进行了表征。 HPPPA的加入可以显着提高PENT的阻燃性，随着HPPPA的负载量从0到5 wt％的增加，PENT的LOI值从24.4增加到37.6。结论：PENT的熔点低且熔点高阻燃性。 HPPPA可以用作第四种共聚单体，以提高PENT的阻燃性，同时降低共聚酯的T_m值。

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