## Abstract ABCBA type pentablock copolymers, in which the A, B and C blocks are poly (pโDioxanone) (PPDO), poly (LโLactide) (PLLA), and polyethylene glycol (PEG), respectively, were synthesized via a twoโstep ringโopening polymerization in bulk using stannous octoate as the catalyst. PLAโbโPEGโbโP
Thermal decomposition kinetics of copolymers derived fromp-dioxanone, L-lactide and poly(ethylene glycol)
โ Scribed by Narayan Bhattarai; Myung Seob Khil; Seung Jin Oh; Hak Yong Kim; Kwan Woo Kim
- Publisher
- The Korean Fiber Society
- Year
- 2004
- Tongue
- English
- Weight
- 397 KB
- Volume
- 5
- Category
- Article
- ISSN
- 1229-9197
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## Abstract Poly(Lโlactide)โpoly(ethylene glycol) multiblock copolymers with predetermined block lengths were synthesized by polycondensation of PLA diols and PEG diacids. The reaction was carried out under mild conditions, using dicyclohexylcarbodiimide as the coupling agent and dimethylaminopyrid
Poly (L-lactide)-poly (oxyethylene)-poly (L-lactide) block copolymers obtained in bulk, by a ring opening mechanism, from poly(ethylene glycol)s (PEG)s and L-lactide (LA), at 120-1 40 ยฐC, in the absence of added catalysts are described. By using PEGs with different molecular masses, 3000 and 35 000,
Poly(ethylene glycol)-poly(L-lactide) diblock and triblock copolymers were prepared by ring-opening polymerization of L-lactide with poly(ethylene glycol) methyl ether or with poly(ethylene glycol) in the presence of stannous octoate. Molecular weight, thermal properties, and crystalline structure o
## Abstract The confined crystallization behavior, melting behavior, and nonisothermal crystallization kinetics of the poly(ethylene glycol) block (PEG) in poly(Lโlactide)โpoly(ethylene glycol) (PLLAโPEG) diblock copolymers were investigated with wideโangle Xโray diffraction and differential scanni