摘要
采用邻苯二甲酸二辛酯(DOP)和柠檬酸三丁酯(TBC)两种增塑剂以及丁腈橡胶(NBR)和氯化聚乙烯(CPE)两种增韧剂对PVC防水卷材进行改性,研究其在PVC防水卷材老化过程中力学性能变化的影响,并分别对不同增塑剂和增韧剂进行性能比较.结果表明:DOP体系和TBC体系经老化后,相同的配方,断裂伸长率降低,但拉伸强度有所增大;DOP和TBC用量越大,拉伸强度保持率和断裂伸长率保持率均减小,且TBC体系耐老化性能优于DOP体系.CPE体系和NBR体系经老化后,相同的配方,断裂伸长率和拉伸强度均有所降低.当CPE和NBR加入质量分别为20~30,g和10,g时,PVC防水卷材具有较好的力学性能与耐老化性能.
Two plasticizers dioctyl phthalate（DOP）and tributyl citrate（TBC）and two toughening agents nitrile rubber（NBR）and chlorinated polyethylene（CPE）were used to modify PVC waterproofing materials and study their effect on PVC waterproofing membrane mechanical properties in the aging process.Finally,the properties of different plasticizers and toughening agents were compared.The result can be concluded as follows：after DOP and TBC systems were aged,elongation at break decreased while the tensile strength increased in the same formula;the tensile properties of TBC system were superior to those of DOP system before and after aging;the greater the amount of DOP and TBC was,the lower the retention rate of both tensile strength and elongation of breaking elongation,and the aging resistance of TBC was better than that of DOP.After CPE and NBR systems aged,elongation at break and the tensile strength both decreased with the same formula.When the mass of CPE and NBR were 20-30,g and 10,g respectively,PVC waterproof membrane had good mechanical properties and aging resistance.
作者
任欣欣
邬素华
康诗懿
张璟晨
REN Xinxin;WU Suhua;KANG Shiyi;ZHANG Jingchen(College of Chemical Engineering and Materials Science,Tianjin University of Science ＆ Technology,Tiaxljin 300457,China)
出处
《天津科技大学学报》
CAS
2018年第4期44-48,共5页
Journal of Tianjin University of Science & Technology
关键词
PVC防水卷材
增塑剂
增韧剂
耐老化性能
PVC waterproof membrane
plasticizer
flexibilizer
aging resistance
