Poly(ε-caprolactone)-grafted acetylated anhydroglucose oligomer by ring-opening polymerization -: Synthesis and characterization

被引:6
作者
Gädda, T
Kylmä, J
Tuominen, J
Mikkonen, H
Laine, A
Peltonen, S
Seppälä, J
机构
[1] Aalto Univ, Dept Chem Technol, Helsinki, Finland
[2] Res Ctr Finland, VTT, Rajamaki, Finland
关键词
biopolymers; graft copolymers; polyesters; ringopening polymerization; polysaccharicies;
D O I
10.1002/app.23697
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
A novel acetylated anhydroglucose oligomer (AGU-oligomer), prepared by acid catalyzed transglycosidation of potato starch triacetate and ethylene glycol, was used as a multifunctional coinitiator for the ring-opening polymerization of E-caprolactone (e-CL). The polymers were synthesized using different weight ratios of the starting materials and were characterized by NMR, SEC, and MALLS. The results confirmed the expected P(AGU/CL) polymer structure, namely a 'comb-like' graft-copolymer having the AGU oligomer as backbone with PCL grafts of variable chain lengths (L-CL = 4-21). Thermal and mechanical properties of graft-copolymers with different epsilon-CL block lengths were examined. By changing the graft length, crystallinity was controlled and amorphous polymers were obtained with AGU-oligomer contents higher than 50 wt %. The tensile properties varied with the composition and a copolymer having 40 wt % of AGU-oligomer behaved like soft elastomer, showing high elongation at break. (c) 2006 Wiley Periodicals, Inc.
引用
收藏
页码:1633 / 1641
页数:9
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