SYNTHESES OF STYRENE-METHYL METHACRYLATE BLOCK COPOLYMER BY POLYAZOAMIDE AS INITIATOR

Polyazoamide(PAA) was used as initiator to prepare block copolymer P(MMA-b-St) byfree radical polymerization. The fraction of block copolymer was about 50%. The structureof the block-copolymer was characterized by IR and the results of ~1H-NMR and GPCshowed that the content of the block and the molecular weight (M_w) of the prepolymerand block copolymer could be controlled by varying the mol ratio of styrene/PAA andMMA/prepolymer. DSC and TEM results revealed that the block copolymer has twoseparated glass transition temperatures and phase separation within the domain structure.     

大分子偶氮引发剂──聚偶氮酰胺的合成与表征

本文应用里特（Ｒｉｔｔｅｒ）反应机理将偶氮二异丁腈与三聚甲醛在浓硫酸催化作用下反应，制备出一类新型的大分子偶氮引发剂──聚偶氮酰胺，研究了催化剂用量，溶剂和反应时间对产物转化率的影响，选择出最佳反应条件；ＩＲ，１Ｈ—ＮＭＲ，ＵＶ和ＧＰＣ对其结构进行了表征，ＤＳＣ研究了热分解反应动力学，结果表明其热分解反应活化能和反应速度常数均与偶氮二异丁腈有所差异．