New Invention Profile
| Publication No: | IN202311005075 [India] | Application No: | 202311005075 |
| Title: | Processable ultra-high temperature pmr based polyimides using ppda, 3,4'-oda and btda | ||
| Publication Date: | 26-07-2024 | File Date: | 25-01-2023 |
| Inventor(s): | George Raja Singh Thangadurai; Budaraju Venkata Sita Rama Murthy; Chekuri Satyanarayana Raju; Krishnasamy Ashoka Vijayan; Prasad Randhir; Dasharath Ram; Reddy Madadi Ugender; Dwivedi Mayank; Kamble Sanjay Pandurang; Ponrathnam Surendra; Chavan Nayaku Nivrati; Wale Apparav Komarappa; Dhage Atul Vilasrao | ||
| IPC Classification: | B32B 27/34, C08G 73/10, C08G 73/14, C08L 79/08, C09D 179/08 | ||
| Abstract: | The present invention relates to a method for the preparation of PMR based processable and ultra-high temperature cured polyimides using PMR oligomer possess glass transition temperature (Tg) higher than 400 0C using PMR oligomer. PMR oligomers were derived from copolymerization of 3,4?-oxydianiline (3,4?-ODA), p- phenylenediamine (PPDA) and 3,3',4,4'-benzophenone tetracarboxylic dianhydride (BTDA) by varying mole ratios respectively. Polymerization performed in the presence of common solvents such as alcohol (ethyl alcohol) and aprotic solvents namely N-Methyl pyrrolidone (NMP) and N,N-Dimethyl acetamide (DMAc). PMR based processable and ultra-high temperature cured polyimide showed excellent thermal and thermo-oxidative stability. The glass transition temperature (Tg) was determined by DSC and was in the range of 429 to 4350C. Simultaneously, thermogravimetric analysis (TGA) was also performed and 10% weight loss (T10) was ranging from 580 to 5840C. |
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Industrial Applications
Chemistry, Chemical Processes Polymers [Chemistry, Chemical Processes]