成核剂YS-688改性抗菌PP薄膜的研究

以聚丙烯（PP）为基体树脂，改性载银磷酸锆为抗菌剂，YS-688（二苄叉山梨醇衍生物）为成核剂，制备抗菌剂母粒、成核剂母粒和抗菌PP薄膜，研究了成核剂改性抗菌PP薄膜性能。结果表明：经YS-688改性的抗菌PP薄膜，球晶尺寸减小，结晶密度增大，结晶温度提高；含0．9％改性载银磷酸锆和0.3％YS-688的PP薄膜，其拉伸强度（纵向／横向）51．16／31．88MPa，透光率88．8％，雾度2．9％，对金黄色葡萄球菌和大肠杆菌抗菌率为99．26％和99．57％，物理力学性能和抗菌性能优良。

Study on Nucleating Agent YS-688 Modified Antibacterial PP Film

Antibacterial agent masterbatch, nucleating agent masterbatch and antibacterial PP films were prepared by using PP as base resin, modified silver-loaded zirconium phosphate as antibacterial agent and YS-688 （second benzylidene sorbitol derivative） as nucleating agent, and the performances of the antibacterial PP films modefied by nucleating agent were studied. The results show that the addition of YS-688 reduces the spherulite size and given an increment in crystal density and crystallization temperature of the antibacterial PP films; in the case of adding 0.9%（mass） modified silver-loaded zirconium phosphate and 0.3 %（mass） YS-688, the tensile strength （vertical / horizontal） and transparence of the antibacterial PP film reach to 51.16/31.88 MPa and 88.8 %, the haze reduces to 2.9 %, the antibacterial rate to Staphylococcus aureus and Escherlchia coli of the antibacterial PP film reach to 99.26 % and 99.57% respectively, and the physical and mechanical properties and antibacterial properties of the film are excellent.