H2SO4表面改性PET性能研究  

Study on the properties of PET modified by H2SO4

作　　者：豆鹏飞 Dou Pengfei(PetroChina Changqing Oilfield Company,Yulin 718100,Shaanxi,China)

机构地区：[1]长庆油田公司,陕西榆林718100

出　　处：《橡塑技术与装备》2020年第6期23-27,共5页China Rubber/Plastics Technology and Equipment

摘　　要：聚对苯二甲酸乙二酯(PET)作为合成纤维主要原材料,其具有优异的力学性能以及耐化学腐蚀性。但PET作为纺织纤维使用,其亲水性以及透气性较差。所以本文采用H2SO4对PET表面进行了改性研究。实验中采用DSC对表面改性后的PET观察其特征温度;采用FT-IR对改性后PET基团进行了表征;最后,对其力学性能以及吸水率进行了测定。实验结果表明,PET表面未改性时拉伸强度为286.70 MPa,PET经80%H2SO4在30℃浸泡30 min后拉伸强度降至176.16 MPa;PET表面未改性时吸水率为0.01%,PET经80%硫酸在60℃下浸泡180 min后吸水率增至1.03%;经硫酸处理后的PET薄膜升高,PET表面未改性时时熔融温度(Tm)为254.37℃,经80%硫酸在60℃下浸泡180 min后升至256.3℃。Poly(ethylene terephthalate)(PET),as the main raw material of synthetic fiber,has excellent mechanical properties and chemical corrosion resistance.However,PET used as textile fiber has poor hydrophilicity and air permeability.Therefore,the surface of PET was modified by H2SO4.In the experiment,DSC was used to observe the characteristic temperature of PET after surface modification;FT-IR was used to characterize the modified PET group;finally,the mechanical properties and water absorption were measured.The results showed that the tensile strength of PET without surface modification was 286.70 MPa,and the tensile strength of PET decreased to 176.16 MPa after being immersed in 80%H2SO4 at 30℃for 30 min;the water absorption of PET without surface modification was 0.01%,and the water absorption of PET increased to 1.03%after being immersed in 80%sulfuric acid at 60℃for 180 min;The melting temperature(Tm)of unmodified pet surface was 254.37℃,which increased to 256.3℃after 80%sulfuric acid was immersed at 60℃for 180 min.

关 键 词：聚对苯二甲酸乙二酯 表面改性 拉伸强度 吸水率 熔融温度 

分 类 号：TQ325[化学工程—合成树脂塑料工业]