𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Preparation and properties of polyimides and polyamide-imides from diisocyanates

✍ Scribed by Mehdi Barikani; Shahram Mehdipour Ataei

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
198 KB
Volume
37
Category
Article
ISSN
0887-624X

No coin nor oath required. For personal study only.

✦ Synopsis

Polyimides of different structures were synthesized by reaction of 1,4phenylene diisocyanate (PPDI) and 1,5-naphthalene diisocyanate (NDI) with pyromellitic dianhydride (PMDA) and 3,3Ј,4,4Ј-benzophenonetetracarboxylic dianhydride (BTDA). Polyamide-imides were also prepared by reaction of PPDI and NDI with trimellitic anhydride. The optimized condition for polymerization reactions were obtained via the study of model compounds. All polymers and model compounds were characterized by conventional methods. Physical properties of polymers, including thermal behavior, thermal stability, solution viscosity, and solubility behavior, were also studied.

πŸ“œ SIMILAR VOLUMES

Aromatic/cycloaliphatic polyimides and p
Aromatic/cycloaliphatic polyimides and polyamide-imide from trans-1,4-cyclohexane diisocyanate: synthesis and properties
✍ Mehdi Barikani; Shahram Mehdipour-Ataei πŸ“‚ Article πŸ“… 2000 πŸ› John Wiley and Sons 🌐 English βš– 131 KB πŸ‘ 2 views

Mixed aromatic/alicyclic polyimides were prepared by polycondensation reactions of trans-1,4-cyclohexane diisocyanate (CHDI) with pyromellitic dianhydride (PMDA), benzophenonetetracarboxylic dianhydrid (BTDA), and hexafluoroisopropylidene diphthalic anhydride (6FDA). Also, polycondensation of CHDI w

Preparation and properties of novel arom
Preparation and properties of novel aromatic polyamides and polyimides jacked with dendritic fragments
✍ Yufei Li; Tao Ji; Jian Zhang πŸ“‚ Article πŸ“… 2000 πŸ› John Wiley and Sons 🌐 English βš– 198 KB πŸ‘ 2 views

The polycondensation of polymerizable diamines bearing two generations of Percec-type dendritic blocks with dianhydrides led to the formation of novel aromatic polyamic acids that then were converted into a series of novel aromatic polyimides jacked with dendritic fragments. Their solubility in orga

Synthesis and properties of polyimides,
Synthesis and properties of polyimides, polyamides and poly(amide-imide)s from ether diamine having the spirobichroman structure
✍ Sheng-Huei Hsiao; Chin-Ping Yang; Ching-Yen Yang πŸ“‚ Article πŸ“… 1997 πŸ› John Wiley and Sons 🌐 English βš– 190 KB πŸ‘ 1 views

A novel spirobichroman unit containing dietheramine, 6,6-bis(4-aminophenoxy)-4,4,4,4,7,7-hexamethyl-2,2 -spirobichroman ( 3), was prepared by the nucleophilic substitution of 6,6-dihydroxy-4,4,4 ,4,7,7-hexamethyl-2,2 -spirobichroman with p-chloronitrobenzene in the presence of K 2 CO 3 followed by h