基于微纳层共挤技术制备多层PC/PMMA光学薄膜  

Preparation of Multilayer PC/PMMA Optical Films Based on Micro-Nano Layer Co-Extrusion Technology

作　　者：岑少飞 张咏[2] 张凤 CEN Shao-Fei;ZHANG Yong;ZHANG Feng(Guangxi City Vocational University,Chongzuo 532100,China;Guangxi Vocational&Technical Institute of Industry,Nanning 530001,China)

机构地区：[1]广西城市职业大学,广西崇左532100 [2]广西工业职业技术学院,广西南宁530001

出　　处：《塑料科技》2021年第8期51-54,共4页Plastics Science and Technology

摘　　要：为制备力学性能好、高隔热性和高透光性的复合薄膜,本实验通过微纳层共挤技术,经层叠装置得到多层聚碳酸酯/聚甲基丙烯酸甲酯(PC/PMMA)光学薄膜,并对其最佳厚度值、流动和微观形态、力学性能和光学性能进行测试。结果表明:挤出温度应控制在245~260℃,两种聚合物的熔体流动速率基本相同;200μm厚度的复合薄膜平均反射率和平均透过率最高,可分别达到24.2%和82.2%。通过断面SEM分析发现:PC和PMMA两种物料层叠效果好,达到实验预期目的。加入PC后,复合薄膜的TD和MD方向上的拉伸强度和断裂伸长率均呈现较大幅度提升,说明PC形成多层复合薄膜能够显著改善PMMA力学性能。光学性能测试发现:近红外区域,PC/PMMA复合薄膜的反射率明显优于单一薄膜,200μm厚度的复合薄膜反射近红外区域的最大反射率为25.7%,平均反射率可达24%,改善光学性能效果最好。In order to prepare composite films with good mechanical properties, high thermal insulation and high light transmittance, multilayer PC/PMMA optical films were prepared by micro-nano layer co-extrusion technology through a stacking device, and the optimal thickness, flow and micro morphology, mechanical properties and optical properties of PC/PMMA optical films were tested. The results show that the extrusion temperature are controlled at 245~260℃. The melt flow rates of the two polymers are basically the same. The average reflectivity and average transmittance of the composite film with the thickness of 200 μm are the highest, which reach 24.2% and 82.2% respectively. The SEM analysis of the cross section shows that the lamination effect of PC and PMMA is good, which achieves the expected purpose of the experiment. After adding PC, the tensile strength and elongation at break of the composite films in the TD and MD directions are significantly improved, indicating that the formation of multilayer composite films by PC can significantly improve the mechanical properties of PMMA. In the near infrared region, the reflectivity of PC/PMMA composite film is obviously better than that of single film. The maximum reflectivity in the near infrared region is 25.7%and the average reflectivity was 24% when the thickness of the composite film is 200 μm, and showes the best results for improving optical performance.

关 键 词：微纳层共挤技术 光学薄膜 力学性能 光学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]