PLA大分子单体接枝NVP共聚物的合成与性能
Synthesis and Properties of a Graft Copolymer Derived from Poly(D,L-lactide) Macromonomer and N-Vinyl Pyrrolidone
-
摘要: 制备了末端为双键的功能化聚乳酸大分子单体(PLA-HEMA),并以此大分子单体与N-乙烯基吡咯烷酮(NVP)进行自由基溶液共聚,合成了具有亲水性PVP-PHEMA主链和疏水性PLA支链的接枝共聚物。用FT-IR1、H-NMR、GPC、DSC、表面接触角测定研究了共聚物的结构与性能。结果表明:共聚物为非晶聚合物;NVP的摩尔投料量对共聚物的性能有显著影响,随NVP投料量增大,共聚物的分子量有所下降,玻璃化转变温度(Tg)增大;由于亲水性PVP和PHEMA链段的引入,共聚物的亲水性优于相应的线型聚乳酸材料。Abstract: Poly(D,L-lactide) macromonomer(PLA-HEMA) carrying the acrylate group was first prepared.Then,the graft copolymers with hydrophilic PVP-PHEMA backbone and hydrophobic PLA branched chain were synthesized by the free radical copolymerization of PLA-HEMA with
下载: