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首页> 外文期刊>Journal of Applied Polymer Science >A tough noncombustible material prepared by grafting of poly(2-ethylhexyl acrylate) with vinyl chloride
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A tough noncombustible material prepared by grafting of poly(2-ethylhexyl acrylate) with vinyl chloride

机译：通过将聚（丙烯酸2-乙基己酯）与氯乙烯接枝制备的坚韧的不可燃材料

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摘要

A noncombustible tough poly(vinyl chloride) (tPVC) was prepared by suspension-grafted copolymerization of poly(2-ethylhexyl acrylate) (poly-EHA; elastomer) with vinyl chloride (VC). Elastomer (poly-EHA) was prepared by emulsion, mainly homopolymerization of 2-ethylhexyl acrylate at a temperature of 30 +/- 0.1degreesC in the presence of a redox system and with the advantage of dosing the monomer into two portions. Grafted-suspension copolymerization of poly-EHA with VC was carried out at 54 +/- 0.1degreesC, keeping other reaction conditions only slightly modified in comparison with those for the polymerization of pure VC. An optimum content of the incorporated poly-EHA in PVC was found to be in the range 7.5-8.5 wt %, whereas notched toughness of 85-87 kJ m(-2) was reached. Both below and above the found range of the content of poly-EHA, the toughness decreases. A copolymer prepared by a direct-emulsion copolymerization of 2-EHA and VC (poly-EHA-co-VC) exhibited worse mechanical properties than the copolymer prepared by two polymerization steps. On the basis of experimental results, effects of the reaction procedure on the properties of resulting material are described. In addition to good mechanical properties, tPVC also shows its noncombustibly. (C) 2002 John Wiley Sons, Inc. [References: 17]
机译：通过将聚丙烯酸2-乙基己酯（聚-EHA;弹性体）与氯乙烯（VC）悬浮接枝共聚，制备了不可燃的坚韧聚氯乙烯（tPVC）。弹性体（聚-EHA）是通过乳液制备的，主要是在氧化还原体系存在下，在30 +/- 0.1摄氏度的温度下，丙烯酸2-乙基己酯的均聚反应，其优点是可将单体分为两部分。聚-EHA与VC的接枝-悬浮共聚是在54 +/- 0.1℃下进行的，与纯VC的聚合相比，其他反应条件仅稍作改动。发现在PVC中掺入的聚-EHA的最佳含量在7.5-8.5重量％的范围内，而缺口韧性达到85-87kJ m（-2）。低于和高于发现的聚-EHA含量范围，韧性均降低。通过2-EHA和VC的直接乳液共聚制备的共聚物（聚-EHA-co-VC）显示出比通过两个聚合步骤制备的共聚物更差的机械性能。根据实验结果，描述了反应步骤对所得材料性能的影响。除了良好的机械性能外，tPVC还具有不可燃性。 （C）2002 John Wiley Sons，Inc. [参考：17]

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