摘要
提出“三步法”制备刷状聚乙烯醇-g-聚乳酸接枝共聚物(PVA-g-PLLA),合成出一系列PVA-g-PLLA.借助FTIR,1H-NMR等方法对其结构进行表征,并考察其热行为与平均接枝数的关系.实验结果表明,制得的PVA-g-PLLA的Tg和晶区熔融峰随着平均接枝数量的减少而相应降低.因此,利用“三步法”可以改变平均接枝数,从而有效调控PVA-g-PLLA的热行为.
A new method called ＂three-step method＂ has been put up for preparing brushlike poly（vinyl aleohol）-g-poly（L-laetide） graft eopolymers（PVA-g-PLLA）. The structures of all the PVA-g-PLLA were characterized by means of FTIR, ^1H-NMR etc. The relationship of the thermal behavior of the PVA-g-PLLA with average grafting number was further investigated.The results show that the melting peak temperature of crystal zone of the acquired PVA-g-PLLA decreases with the reduction of average grafting number. Therefore, the thermal behavior of PVA-g-PLLA could be effectively adjusted through changing average grafting number which was able to be realized by ＂three-step method＂ .
出处
《汕头大学学报（自然科学版）》
2006年第2期17-23,共7页
Journal of Shantou University：Natural Science Edition
