三元乙丙防水片材含胶率的测定  

Determination of rubber content of EPDM waterproofing membrane

作　　者：胡昕[1,2] 宁春花[1] 

机构地区：[1]常熟理工学院化学与材料工程系 [2]江苏省新型功能材料重点建设实验室(常熟理工学院),江苏常熟215500

出　　处：《新型建筑材料》2006年第9期56-60,共5页New Building Materials

摘　　要：研究了热重分析法测定三元乙丙防水片材中含胶率的方法,讨论了各种配合剂和测试方法对测定结果的影响。结果表明,在氮气气氛下,采用速率法和直接法均可以准确地测定出硫化胶中三元乙丙的含量,适宜的升温速率为5℃/min。采用速率法时,必须用工作曲线校正硫化三元乙丙的失重特性速率;采用直接法时,应以增塑剂失重峰结束的温度为前后两失重台阶的分界线为宜。采用该方法可以准确测定三元乙丙防水片材中的三元乙丙橡胶的含量,从而评价三元乙丙防水片材的内在质量。Studied the determination method of rubber content of EPDM waterproofing membrane by thermo-gravimetfic analysis and discussed influence of different agents and test methods on the result of determination.The result shows that EPDM content can be accurately determined by both method of mass loss rate and the direct method under nitrogen atmosphere and the feasible calefactive rate is 5℃/min. Characteristic mass loss rate of vulcanized EPDM should be proofread by working curve when the method of mass loss rate is adopted,while ending temperature of mass loss peak of plasticizing agent should be the division of mass loss steps when direct method is adopted.EPDM rubber content of EPDM waterproofing membrane can be nicely determined by above methods so as to evaluate the intrinsic quality of EPDM waterproofing membrane.

关 键 词：三元乙丙防水片材 热重分析 含胶率 测定 

分 类 号：TU573.4[建筑科学—建筑技术科学]