𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Preparation and properties of organo-soluble polyimides based on 4,4′-diamino-3,3-dimethyldiphenylmethane and conventional dianhydrides

✍ Scribed by Qing-Hua Lu; Jie Yin; Hong-Jie Xu; Jian-Ming Zhang; Li-Ming Sun; Zi-Kang Zhu; Zong-Guang Wang

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
129 KB
Volume
72
Category
Article
ISSN
0021-8995

No coin nor oath required. For personal study only.

✦ Synopsis

4,4Ј-Diamino-3,3Ј-dimethyldiphenylmethane was used to prepare polyimides in an attempt to achieve good organo-solubility and light color. Polyimides based on this diamine and three conventional aromatic dianhydrides were prepared by solution polycondensation followed by chemical imidization. They possess good solubility in aprotonic polar organic solvents such as N-methyl 2-pyrrolidone, N,N-dimethyl acetamide, and m-cresol. Polyimide from 4,4Ј-diamino-3,3Ј-dimethyldiphenylmethane and diphenylether-3,3Ј,4,4Ј-tetracarboxylic acid dianhydride is even soluble in common solvents such as tetrahydrofuran and chloroform. Polyimides exhibit high transmittance at wavelengths above 400 nm. The glass transition temperature of polyimide from 4,4Ј-diamino-3,3Ј-dimethyldiphenylmethane and pyromellitic dianhydride is 370°C, while that from 4,4Ј-diamino-3,3Ј-dimethyldiphenylmethane and diphenylether-3,3Ј,4,4Ј-tetracarboxylic acid dianhydride is about 260°C. The initial thermal decomposition temperatures of these polyimides are 520 -540°C.

📜 SIMILAR VOLUMES

New organo-soluble aromatic polyimides b
New organo-soluble aromatic polyimides based on 3,3′,5,5′-tetrabromo-2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride and aromatic diamines
✍ Guey-Sheng Liou; Jen-Shi B. Wang; Shih-Ting Tseng; Raymond Chien-Chao Tsiang 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 144 KB 👁 1 views

New aromatic tetracarboxylic dianhydride, having isopropylidene and bromo-substituted arylene ether structure 3,3Ј,5,5Ј-tetrabromo-2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride, was synthesized by the reaction of 4-nitrophthalonitrile with 3,3Ј,5,5Ј-tetrabromobisphenol A, followed by al

Preparation and properties of soluble ar
Preparation and properties of soluble aromatic polyetherimides based on 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]hexafluoropropane dianhydride
✍ Dong-Ho Lee; Seung-Young Koo; Dae-Yong Kim; Heung-Jin Choi 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 190 KB 👁 2 views

Aromatic polyetherimides were synthesized from a fluorine containing aromatic carboxylic acid dianhydride, 2,2-bis [4-(3,4-dicarboxyphenoxy)phenyl]hexafluoropropane dianhydride (6F-BABPA) and five typical aromatic diamines including 1,1-bis(4-aminophenyl)-1-phenyl-2,2,2-trifluoroethane (3F-DAM) by t

Preparation and characterization of 3,3′
Preparation and characterization of 3,3′,4,4′-benzophenone tetracarboxylic dianhydride-pyromellitic diahydride alternating polyimides
✍ Yu Yang; Xujie Yang; Zhengliang Zhi; Lude Lu; Xin Wang 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 183 KB 👁 1 views

Four kinds of 3,3 ,4,4-benzophenone tetracarboxylic dianhydride (BTDA) -pyromelliitic dianhydride (PMDA) alternating polyimide (BTDA-PMDA API) were obtained by reacting 1 mol BTDA with 2 mol diamines to form BTDA chainextended diamines (BTDA CED), followed by the addition of 1 mol PMDA to yield the

Preparation and physical properties of p
Preparation and physical properties of poly(4,4′-diamino-3′-carbamoylbenzanilide terephthalamide) and poly(4,4′-diamino-3′-carbamoylbenzanilide isophthalamide) films
✍ Seog Joo Kang; Sung Il Hong; Chong Rae Park 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 140 KB 👁 1 views

To prepare thermally stable and high-performance polymeric films, new solvent-soluble aromatic polyamides with a carbamoyl pendant group, namely poly(4,4Јdiamino-3Ј-carbamoylbenzanilide terephthalamide) (p-PDCBTA) and poly(4,4Ј-diamino-3Ј-carbamoylbenzanilide isophthalamide) (m-PDCBTA), were synthes