Synthesis and Properties of Poly(Ester Urethane)s Consisting of Poly(l-Lactic Acid) and Poly(Ethylene Succinate) Segments
β Scribed by Zeng, Jian-Bing; Li, Yi-Dong; Li, Wen-Da; Yang, Ke-Ke; Wang, Xiu-Li; Wang, Yu-Zhong
- Book ID
- 111688900
- Publisher
- American Chemical Society
- Year
- 2009
- Tongue
- English
- Weight
- 120 KB
- Volume
- 48
- Category
- Article
- ISSN
- 0888-5885
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
## Abstract Polyurethanes containing different soft and hard segments were investigated by fluorescence and scanning electron microscopy. The polarity dependence of the vibrational structure of the pyrene emission spectrum indicated the formation of aggregates at concentrations, which are significa
The hydrolysis behaviour of lactic acid based poly(ester-urethane)s has been studied in a bu β er solution of pH 7Γ00 at 37 and 55Β‘C. Samples were prepared using a straight two step lactic acid polymerization process. The lactic acid was Γrst polymerized by condensation with a low molecular weight by
Biodegradable PHB-PEG multi-block polyurethane copolymers comprising PHB blocks (M n : 1100, 1740 and 3240) and PEG blocks (M n : 1960, 3250, 4150 or 7950) were synthesized followed by characterization by GPC, 1 H NMR, and FT-IR. The PHB contents ranged from 9 to 62% by weight. The copolymers displa