多层共挤流延法制备PVDF复合膜的研究

发布时间：2018-05-30 09:48

本文选题：聚偏氟乙烯 + 聚甲基丙烯酸甲酯　；参考：《北京化工大学》2011年硕士论文

【摘要】：PVDF具有优异的耐候性、抗紫外线性能和良好的力学性能,已被广泛的应用于化工、电气、电子及机械工业等各个行业。但是由于PVDF粘接性能较差,限制了其使用范围,因此要对其进行改性研究。本文分别研究了Ti2、PMMA对PVDF共混体系性能的影响,并采用多层共挤流延法制备了PVDF多层复合膜,并对复合膜性能进行了研究。本文首先根据流延工艺要求对所用原料进行了研究筛选,通过共混的方式对PVDF进行改性研究,分别制备了TiO2、PVDF共混膜和PMMA/PVDF共混膜；然后通过熔融指数(MI)、扫描电镜(SEM)、X射线衍射(XRD)、差示扫描量热(DSC)、热失重分析(TGA)、接触角和力学性能测试等方法对共混膜的性能进行了研究讨论。结果表明,随着Ti02含量的变化,其对Ti02/PVDF共混膜的流动性能、结晶性能、力学性能、亲水性能等都有影响；而随着PMMA的含量变化,PMMA的加入对PMMA/PVDF共混膜的流动性能、加工性能、结晶能力、力学性能等都有较大影响；通过研究,确定了最佳的共挤实验配方及共挤出复合工艺参数,通过共挤流延法制备了三层共挤复合膜,并对其性能进行了研究。结果表明所制得的复合膜各项性能符合设计要求,达到了使用需求。
[Abstract]:PVDF has excellent weatherability, anti ultraviolet and good mechanical properties. It has been widely used in various industries, such as chemical, electrical, electronic and mechanical industries. But because of poor bonding performance of PVDF, it is restricted to its application. Therefore, the performance of PVDF blends with Ti2 and PMMA has been studied in this paper. The PVDF multilayer composite films were prepared by multi-layer co extrusion casting method, and the properties of the composite membranes were also studied.
In this paper, the raw materials used in this paper are studied and screened according to the requirements of the casting process. The PVDF is modified by blending. The TiO2, PVDF blend film and PMMA/PVDF blend film are prepared, and then through the melting index (MI), scanning electron microscope (SEM), X ray diffraction (XRD), differential scanning calorimetry (DSC), thermal weight loss analysis (TGA), contact angle The properties of the blend films were studied and discussed by mechanical properties. The results showed that with the change of Ti02 content, the flow properties, crystallization properties, mechanical properties and hydrophilic properties of the Ti02/PVDF blend membranes were affected. With the change of PMMA content, the flow properties and processing properties of the PMMA/PVDF blend films were added by PMMA. The crystallization ability, mechanical properties and so on have great influence. Through the study, the best co extrusion formula and co extrusion process parameters are determined. Three coextrusion composite films are prepared by coextrusion casting, and their properties are studied. The results show that the properties of the composite films meet the requirements of design and meet the requirements of use.
【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TQ320.721

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