CPE增容TPU/PVC共混弹性体及相形态  

Compatibilization of CPE for TPU/PVC blended elastomers and phase morphology

作　　者：张青海[1] 陈汝盼[1] 欧阳娜[1] 王小君 林松柏[1] ZHANG Qinghai;CHEN Rupan;OUYANG Na;WANG Xiaojun;LIN Songbai(New Materials and Shoes&Clothing Engineering School,Liming Vocational University,Quanzhou 362000,China)

机构地区：[1]黎明职业大学新材料与鞋服工程学院,福建泉州362000

出　　处：《工程塑料应用》2024年第6期170-175,共6页Engineering Plastics Application

基　　金：福建省中青年教师教育科研项目(JAT210877);差别化纤维及功能性鞋服面料研究中心项目(LMPT202301)。

摘　　要：为提高热塑性聚氨酯弹性体(TPU)与聚氯乙烯(PVC)的相容性,以氯化聚乙烯(CPE)为增容剂,经双螺杆挤出机熔融共混制备TPU/PVC共混型热塑性弹性体,测试了不同CPE用量的共混弹性体的拉伸强度、断裂伸长率和硬度等力学性能,以及动态流变性能、动态力学性能和热稳定性。通过扫描电子显微镜(SEM)对共混弹性体的相态结构进行研究。结果表明,当TPU/PVC质量比为70/30时,共混弹性体综合力学性能最佳,拉伸强度为19.92 MPa,断裂伸长率为972%。随着CPE用量的增加,TPU/PVC共混弹性体的拉伸强度、断裂伸长率、硬度等均先增大后减小;CPE用量为6份时,TPU/PVC共混弹性体拉伸强度达到最大,为23.73 MPa,相较未加CPE时提高19.1%。加入CPE的共混弹性体复数黏度和储能模量均呈下降趋势。此外,CPE的加入还能有效提升弹性体高温热稳定性,TPU和PVC两种组分的损耗因子峰内移靠近,共混弹性体液氮脆断面的SEM照片显示PVC相筹明显变小且更为均匀,以上说明CPE对共混弹性体的增塑、增容作用明显,且CPE用量为6份时增容效果最佳。In order to improve the compatibility of thermoplastic polyurethane elastomer(TPU)and polyvinyl chloride(PVC),taking chlorinated polyethylene(CPE)as compatibilizer,the TPU/PVC blended thermoplastic elastomers were prepared by melting and blending with twin-screw extruder.The mechanical properties including tensile strength,elongation at break,hardness,and dynamic rheological properties,dynamic mechanical properties,thermal stability of the blended elastomers with different CPE contents were tested.The phase morphological structure of the blended elastomer was studied by scanning electron microscopy(SEM).The results show that when the mass ratio of TPU/PVC is 70/30,the comprehensive mechanical properties of the blended elastomer are the best,the tensile strength is 19.92 MPa,and the elongation at break is 972%.With the content of CPE increasing,the tensile strength,elongation at break and hardness of the TPU/PVC blended elastomer increase at first and then decrease.When the content of CPE is 6 phr,the tensile strength of the TPU/PVC blended elastomer is the best,which is increased by 19.1%to 23.73 MPa compared with that of the blended elastomer without adding CPE.The complex viscosity and storage modulus of the blended elastomer with adding CPE show a decreasing trend.In addition,the addition of CPE can also effectively improve the high temperature thermal stability of the elastomer,the loss factor peak of the two components of TPU and PVC moves closer,the SEM photos of the liquid nitrogen embrittle-fracture section of the blended elastomer show that the PVC phase is significantly smaller and more uniform,which indicates that CPE has obvious plasticizing and compatibilizing effect on the blended elastomer,and the effect is best when the content of CPE is 6 phr.

关 键 词：塑性聚氨酯弹性体 聚氯乙烯 增容剂 相态结构 力学性能 

分 类 号：TQ323[化学工程—合成树脂塑料工业]