The following zeolite materials were used in this study: Ag 6 Na 46 Y, Ag 16 -Na 36 Y, and Ag 52 Y. These materials were prepared by ion-exchange of the sodium form of LZY-52 (UOP) using standard procedures. For the NEXAFS experiments the powder samples were pressed into aluminum studs (about 10 mm
Block copolymers of unsaturated polyesters and functional elastomers
β Scribed by A. Benny Cherian; Eby Thomas Thachil
- Publisher
- John Wiley and Sons
- Year
- 2004
- Tongue
- English
- Weight
- 163 KB
- Volume
- 94
- Category
- Article
- ISSN
- 0021-8995
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The gel to sol transition of aqueous solutions of di-and triblock copolymers consisting of poly(ethylene oxide) and biodegradable polyesters was studied as a function of temperature. The molecular weight and the chemical composition of the biodegradable blocks, (poly(L-lactic acid), poly(DL-lactic a
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