Memoirs of the Faculty of Engineering, Yamaguchi University
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Memoirs of the Faculty of Engineering, Yamaguchi University Volume 39 Issue 1
published_at 1988-10
Synthesis and Thermostabilities of N-Substituted Maleimide Copolymers. I : N-Cyclohexylmaleimide Copolymers
N-置換マレイミド共重合体の合成と熱安定性 (I) : N-シクロヘキシルマレイミド共重合体
About This Article
Descriptions
The object of this report is to improve the thermostabilities of the common polymers, i. e., polystyrene [poly (ST)], poly (methyl methacrylate) [poly (MMA)] and poly (vinyl acetate) [poly (VAC)], by use of N-cyclohexylmaleimide (CHMI). CHMI was copolymerized with ST, MMA, or VAC in benzene at 60℃, using azobisisobutyronitrile as an initiator. The thermostabilities of the copolymers obtained were investigated by thermal gravimetric analysis (TGA) and differential scanning calorimetric (DSC) measurement. It was found that the initial degradation temperatures and the glass transition temperatures (T_g) of the poly (CHMI-co-MMA)s and poly (CHMI-co-VAC)s rise with increasing the content of CHMI in the copolymers. The softening points and the initial degradation temperatures of poly (CHMI-co-ST)s rise with increasing the CHMI contents in the copolymers, but T_g could not be changed.
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