【作者】 屈红强； 刘彩红； 尚俊敏； 徐建中；

【Author】 QU HongQiang,LIU CaiHong,SHANG JunMin,XU JianZhong(College of Chemisty and Environmental Science Hebei University,BaoDing 071002,China)

【机构】 河北大学化学与环境科学学院；

【摘要】 本文以廉价的BaSO4为基体,采用均匀沉淀法成功合成出了锌锡负载型阻燃剂,并考察了其在软质PVC中的阻燃、抑烟、力学作用。结果表明,添加30phr的锌锡负载型阻燃剂可使得PVC样品的极限氧指数(LOI)增加到31.2%,烟密度等级(SDR)降低到80.33,阻燃消烟性最好;阻燃剂的加入使材料的力学性能略微下降。对阻燃PVC的热降解过程进行分析,结果表明,锌锡负载型阻燃剂的加入使得起始分解温度(Tonset)迅速降低,失重减小,残炭率增加,起到了阻燃消烟作用。另外对烟密度测试完后的样品进行了残炭分析,结果表明,阻燃剂的引入可增加炭层外表面的稳定性,使得内部产生蜂窝状的孔洞。更多还原

【Abstract】 Zinc tin load type flame retardant was synthesized by co-precipition method with cheap BaSO4 as substract,and considering on flame ratardancy,smoke suppression,and mechanical property of PVC.The results showed when 30phr zinc tin load type flame retardant was used,the limiting oxygen index(LOI) of PVC increased to 31.2%,the smoke density grade(SDR) decreased to 80.33,PVC showed a good flame retardancy and smoke suppssion effect;Yet mechanical property of PVC was down.The effet on the thermal decomposition of PVC was analysied by TG and DTG,the results showed good flame ratardancy and smoke suppssion,because the additions of these chemicals caused a decrese in the starting decomposition temperature,a reduction in weight loss,and an increase in the amount of char produced.In addition,the samples which tested by smoke suppssion were analysied,the experiments showed that the outer stable structure of char was increased when flame retardant was used,and the inner of char generated the honeycomb holes.更多还原