## Abstract A series of eight polyurethane elastomers was prepared using a twoβstep bulk polymerization procedure to investigate the effect of the siloxane chain extender 1,3βbis(4βhydroxybutyl)1,1,3,3βtetramethyldisiloxane (BHTD) on polyurethane properties and morphology. All polyurethanes were ba
Polyimides synthesized from siloxane-equilibrated 1,3-bis (3,4-dicarboxyphenyl)-1,1,3,3-tetramethyldisiloxane dianhydride
β Scribed by S. A. Nye; S. A. Swint
- Publisher
- John Wiley and Sons
- Year
- 1991
- Tongue
- English
- Weight
- 579 KB
- Volume
- 43
- Category
- Article
- ISSN
- 0021-8995
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
A series of aromatic copolyimides was prepared from 1,4-bis(3,4dicarboxyphenoxy)benzene dianhydride (HQDPA) and 2,2-bis(3,4-dicarboxyphenyl)hexaΓuoroisopropane dianhydride (6FDA) with 3,3@-dimethyl-4,4@-methylene dianiline (DMMDA) by a chemical imidization. The gas permeability coefficients of the c
Aromatic tetracarboxylic dianhydride having crank and twisted noncoplanar structure, 2,2 -bis(3,4-dicarboxyphenoxy)-1,1 -binaphthyl dianhydride, was synthesized by the reaction of 4-nitrophthalonitrile with 2,2 -dihydroxy-1,1 -binaphthyl, followed by alkaline hydrolysis of the intermediate bis(ether