Polymerization of bismaleimide by Michaeladdition using barbituric acid as nucleophile

• Main Authors: Jia-Wei Shiu, 徐嘉偉
• Other Authors: Syang-Peng Rwei
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/z23mb2

碩士 === 國立臺北科技大學 === 有機高分子研究所 === 97 === In this study, bismaleimide (BMI) and barbituric acid (BTA) were used as monomer to synthesize a new type of polymeric material. Traditional 1H and 13C nuclear magnetic resonance and two dimensional techniques, and so COSY, HSQC, HMBC were employed to analyze the chemical structure of the thus-synthesized polymer products. Meanwhile, dependence of molecular weight on the reaction time was investigate via gel permeation chromatography (GPC). Basically, it increased with reaction time linearly and the final product had a molecular weight around ten thousands with a polydispersity index (PDI) of 2 ~ 4. Additionally, the MALDI-TOF mass spectrum clearly indicated a molecular mass of 476 dalton for the repeat unit in the polymer, suggest both BMI and BTA were monomer and the polymerization were carried out by the Michael addition using BTA as nucleophile. Furthermore the data from evolved gas analysis (EGA) and thermalgravimetric analyzer (TGA) both BMI and BTA were the constitute of the final polymer.