The Study of Non-Isocyanate Aliphatic Polyurethane

• Main Authors: LIU, YU-TING, 劉昱廷
• Other Authors: RWEI, SYANG-PENG
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/5qvx8e

碩士 === 國立臺北科技大學 === 分子科學與工程系有機高分子碩士班 === 107 === Non-isocyanate polyurethane is an alternative way of manufacturing polyurethane. This avoids using isocyanate as raw material, instead, we mainly use aliphatic diamine and ethylene carbonate to synthesize the hydroxyl end of the opened ring’s both ends as a hard segment, and we use a soft segment called PTMG1000 to utilize transesterification condensation polymerization. The by-product is ethylene glycol. The diamine used here is composed of commercially available long and short chain diamine and the novel diamine BAED developed by the laboratory in order to replace the currently commercially available diamine and explore feasibility of this new monomer. The purpose of this study is to mix the hard segment composed of two monomers and the soft segment PTMG1000 to polymerize the non-isocyanate polyurethane in order to compare the properties with the references, exploring the possibility of the laboratory developed novel diamine BAED (Bis(2-aminoethyl)dodecanediamide to synthesize NIPU. The experimental results show that the non-isocyanate polyurethane is polymerized successfully. When we compared the polyurethane synthesized with isocyanate, the stability of the working environment is higher. The condition of monomer selection is greatly affected by the fact that melting point and thermal decomposition temperature are too close to make the degree of polymerization higher. Monomer-synthesized polyurethanes also possess excellent elongation at a certain ratio.