PP/PE双层共挤薄膜界面粘接对撕裂性能的影响  

Influence of Interfacial Adhesion of PP/PE Bilayer Co-Extrusion Films on Tearing Properties

作　　者：吴泳诗 谢嘉宜 徐睿杰[1] 雷彩红[1] WU Yongshi;XIE Jiayi;XU Ruijie;LEI Caihong(Guangdong Energy Storage Materials and Device Engineering Laboratory,School of Materials and Energy,Guangdong University of Technology,Guangzhou,Guangdong 510006,China;School of Chemisty and Civil Engineering,Shaoguan College,Shaoguan,Guangdong 512005,China)

机构地区：[1]广东工业大学,材料与能源学院,广东省储能材料与器件工程实验室,广东广州510006 [2]韶关学院,化学与土木工程学院,广东韶关512005

出　　处：《塑料》2024年第2期1-5,10,共6页Plastics

基　　金：国家自然科学基金(51773044)。

摘　　要：采用熔体拉伸方法制备了聚丙烯(PP)/聚乙烯(PE)双层共挤薄膜,在相同加工条件下,通过采用不同熔体流动速率(MFR)的聚丙烯原料与相同聚乙烯匹配共挤出,探究了熔体流动速率对双层共挤薄膜的界面粘接性能影响,并且,对后续界面形貌和撕裂性能进行测试。结果表明,当PP和PE的熔体流动速率差值(△MFR)为1.3时,双层共挤薄膜的界面剥离力提高至(1172.4±30.7)mN,界面内侧缠结结构增多,内侧表面粗糙度提高至(18.7±1.7);相应的双层薄膜具有较高的撕裂强度,其值为(1.29±0.19)kN/m,撕裂后无明显的微观分层现象,穿刺性能提高。研究结果表明,通过控制熔体流动速率差可以实现不相容树脂的界面粘接,为新型多层共挤膜的开发提供研究基础。Polypropylene(PP)/polyethylene(PE)bilayer co-extruded films were prepared by melt stretching method.The effects on the interfacial adhesion of the bilayer co-extruded films were investigated by co-extrusion of polypropylene with different Melt Flow Rate(MFR)and the same polyethylene under the same processing conditions.And the interfacial inner morphology and tearing performance were studied.Result showed that when the Melt Flow Rate difference(△MFR)of PP and PE was 1.3,the interfacial adhesion of the double-layer co-extruded film increased to(1172.4±30.7)mN and the inner surface roughness increased to(18.7±1.7)with the interfacial inner entanglement structure increasing;The corresponding double-layer film had high tear strength,the value was(1.29±0.19)kN/m with no obvious microscopic delamination after tearing,and improved puncture performance.The results showed that the interfacial adhesion of incompatible resins could be achieved by controlling the Melt Flow Rate difference,providing a research basis for the development of new multilayer co-extruded films.

关 键 词：共挤 界面粘接 撕裂性能 聚丙烯 聚乙烯 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业] TQ325.12