Synthesis, characterization and thermokinetic analysis of the novel sugar based styrene co-polymer

Abstract A new α-chloralose (1,2-O-(R)-trichloroethylidene-α-D-glucofuranose)-based copolymer of styrene (PSVTEG) (2) was synthesized from vinyl (hydroxyl) furan monomer (1) and styrene by a conventional free radical polymerization reaction. The thermal decomposition kinetics of polymer were investigated by means of thermogravimetric analysis in dynamic nitrogen atmosphere at different heating rates. The apparent activation energy for the main stage thermal decomposition of the copolymer PSVTEG (2) was calculated using the Flynn-Wall-Ozawa and found to be 159.0±3 kj/mol. In addition, the activation energy value was calculated according to Coats-Redfern method and found to be compatible with the obtained result. The thermogram of the glycopolymer (PSVTEG) (2) has two decomposition stages and the calculated activation energy indicated that the main degradation stage is a nonspontaneous process (integral form 1/(1−α)2 for F3).

摘要：本研究合成了一种基于α-氯醛糖(α-chloralose，1,2-O-(R)-三氯乙叉基-α-D-葡萄糖呋喃糖)的苯乙烯基共聚物(PSVTEG)(2)，该聚合物由乙烯基（羟基）呋喃单体(1)与苯乙烯经常规自由基聚合反应制得。采用热重分析法，在动态氮气气氛下以不同升温速率对该共聚物的热分解动力学进行了研究。通过弗莱-沃尔-小泽(Flynn-Wall-Ozawa)法计算得到该共聚物PSVTEG(2)主阶段热分解的表观活化能为159.0±3 kJ/mol。此外，采用科茨-雷德费恩(Coats-Redfern)法计算得到的活化能值与上述结果一致。该糖基聚合物(glycopolymer，PSVTEG)(2)的热重曲线包含两个分解阶段，计算所得活化能表明其主要降解阶段为非自发过程，对应反应机理函数的积分形式为1/(1−α)²（对应F3）。