Structural Study on the Transparency of Cross-Linked Polyester Polyurethane
LIU Xin-hai1, LIU Zhi2, SUN Xian-yu2, LIN Yang2, ZHAO Ying1, WENG Shi-fu2, XU Duan-fu1, WU Jin-guang2*
1. Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China 2. The State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
Abstract：The polyurethane material with cross-linked structure was synthesized using half pre-polymerization method. IR, UV-Vis, TEM and XRD methods, and physical properties measurements indicate that different moulding temperatures influence the apparent transparence of polyurethane and abrasive performance, and the nature of these changes is related to the conditions of process and chemical reaction which lead to gradual micro-phase separation of the polyurethane molecules with different compositions, resulting in the domain-forming with the size of sub-micro-, micro- and even more than ten micro-meters. Such domains aggregate one another to form particles with different shapes and complicated structures. The increase in the amount and size of these heterogeneous particles, distributed in the medium of transparent polyurethane, is the main cause that brings on an opaque appearance of polyurethane.
刘新海1，刘 智2，孙贤育2，林 杨2, 赵 莹1, 翁诗甫2，徐端夫1，吴瑾光2* . 交联型聚酯聚氨酯透明度变化的结构研究[J]. 光谱学与光谱分析, 2006, 26(01): 40-44.
LIU Xin-hai1, LIU Zhi2, SUN Xian-yu2, LIN Yang2, ZHAO Ying1, WENG Shi-fu2, XU Duan-fu1, WU Jin-guang2* . Structural Study on the Transparency of Cross-Linked Polyester Polyurethane. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(01): 40-44.
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