Structure/permeability relationships of polyamide-imides
β Scribed by Xuesong Gao; Fengcai Lu
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 375 KB
- Volume
- 54
- Category
- Article
- ISSN
- 0021-8995
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π SIMILAR VOLUMES
To understand the kinetic of synthesis of polyamide-imide (PAI) via pchlorophenol-(PCP) blocked 4,4 -diphenyl methane diisocyanate (MDI) with trimellitic anhydride (TMA), a series of reactions of blocked MDI with excess phthalic anhydride (PA) and benzoic acid are designed. PCP-blocked phenyl isocya
The synthesis of polyamide-imide (PAI) can be performed by the reaction of p-chlorophenol-(PCP) blocked 4,4 -diphenyl methane diisocyanates (BMDI) with trimellitic anhydride (TMA) using a two-stage heating. At 80ΠC the polyimide oligomers were first formed and the high molecular weight PAI can not b
Polyimides of different structures were synthesized by reaction of 1,4phenylene diisocyanate (PPDI) and 1,5-naphthalene diisocyanate (NDI) with pyromellitic dianhydride (PMDA) and 3,3Π,4,4Π-benzophenonetetracarboxylic dianhydride (BTDA). Polyamide-imides were also prepared by reaction of PPDI and ND
We report on a curing study of Probimide 32, a preimidized polyamideimide. The polymer was in a solution of N-methyl pyrrolidone (NMP) and xylene and was spun cast or doctor-bladed to form films for study. The films were cured by drying under a variety of conditions to effect solvent removal. We cha