Effect of Chain Extender on Adhesive and Optical Properties of Transparent Polyurethane Elastomers
The adhesion of an optically smooth poly (methyl methacrylate) (PMMA) on different polyurethane has been investigated. A series of transparent polyurethane block copolymers is synthesized and cast into sheet specimens for optical and adhesion evaluation. The segmented polyurethanes were characterized by ultraviolet-visible spectrometry and their tensile properties were determined. A segmented polyurethane derived from 1, 6-hexanediol exhibits better transparency due to its relatively lower crystallinity of the hard segment Adhesion measurements are performed using floating roller method. Adhesion of transparent polyurethanes on polymethyl-methacrylate (PMMA) substrate is found to be limited by a cohesive failure inside the PMMA bulk. XPS and AFM are employed to study the interface and adhesion of the laminates. The mechanism of interfacial adhesion between TPU and PMMA is discussed. The surface properties of the substrates is evaluated and compared by using a contact angle technique. A chemical linkage (through transesterification reaction) may be formed between PMMA and TPU.
polyurethanes transparency elastomers interfaces adhesion PMMA transesterification reaction interlayer
Hou Junxian Li lei Liu Weidong Yan Yue Chen Xiangbao
Beijing Institute of Aeronautical Materials, Beijing 100095, China Beijing Institute of Aeronautical Materials.Beijing 100095, China Beijing Institute of Aeronautical Materials,Beijing 100095, China
国际会议
2010 Asia-Pacific International Symposium on Aerospace Technology(2010 亚太航空航天技术研讨会 APISAT 2010)
西安
英文
888-890
2010-09-01（万方平台首次上网日期，不代表论文的发表时间）