摘要
不同的高聚物最大分解速率对应的温度不一样,由此可以判断出高聚物的品种。应用热重分析鉴别了几种三元乙丙防水片材中的原材料品种,发现有的样品中使用了丁苯橡胶,有个别氯化聚乙烯橡胶共混防水卷材中没有氯化聚乙烯的存在。利用速率法可以测定三元乙丙和其它橡胶并用胶中三元乙丙橡胶的含量,速率法和直接法都可以测定纯三元乙丙硫化胶中的三元乙丙含量。热重分析还可以测定卷材中增塑剂稳定性的大小。实验证明,利用该方法可以对三元乙丙防水片材中的三元乙丙橡胶含量进行定量分析。该方法迅速准确,为鉴别假冒伪劣产品提供了有效的手段。
The corresponding temperature of maximum decomposition rate of different superpolymer is different, thereby the variety of superpolymer can be judged. Thermogravimetric analysis（TGA）was used to distinguish the raw materials of several kinds of EPDM waterproofing membrane and dizeovered that some samples were blend of EPDM and SBR and also discovered that there was no CPE content in a sample of CPE-mbber cross blend waterproofing membrane. EPDM content of blend can be determined by the method of mass loss rate if EPDM is blended with other rubber, both methods of mass loss rate and directness are suitable to determine the content of EPT in pure EPDM cross linked rubber. TGA can also be adopted to estimate the stability of plasticizer. Experiments prove that use these methods can make quantitative analysis of EPDM content in EPDM waterprofing membrane and provide effective measures for distinguishing counterfeit products quickly and correctly.
出处
《新型建筑材料》
北大核心
2007年第2期65-68,共4页
New Building Materials
关键词
热重分析
防水卷材
含胶率
检测
TGA
waterproofing membrane
rubber content
test
