New Invention Profile
| Publication No: | IN202311005078 [India] | Application No: | 202311005078 |
| Title: | Ultra-high temperature pmr based polyimides for aerospace applications | ||
| Publication Date: | 26-07-2024 | File Date: | 25-01-2023 |
| Inventor(s): | Kamble Sanjay Pandurang; Ponrathnam Surendra; Chavan Nayaku Nivrati; Wale Apparav Komarappa; Dhage Atul Vilasrao; George Raja Singh Thangadurai; Budaraju Venkata Sita Rama Murthy; Chekuri Satyanarayana Raju; Krishnasamy Ashoka Vijayan; Prasad Randhir; Dasharath Ram; Reddy Madadi Ugender; Dwivedi Mayank | ||
| IPC Classification: | B32B 27/34, C08G 73/10 | ||
| Abstract: | The present invention relates to PMR based ultra-high temperature cured polyimides derived from copolymerization of p-phenylenediamine (PPDA), 4,4?-oxydianiline (ODA) and 3,3',4,4'-benzophenone tetracarboxylic dianhydride (BTDA). The polymerization was performed in the presence of solvents such as alcohol (ethyl alcohol) and aprotic solvents namely N-Methyl pyrrolidone (NMP) and N,N-Dimethyl acetamide (DMAc). The glass transition temperature (Tg) of the cured polyimides was in the range of 429 to 435 0C and 10% of weight loss (T10) was at temperature ranging from 574 to 6000C. The char yield of cured polyimide was more than 50% at 6000C. The PMR based ultra-high temperature cured polyimides show excellent thermal and thermo-oxidative stability. | ||
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Industrial Applications
Chemistry, Chemical Processes Polymers [Chemistry, Chemical Processes]
Polymers [Materials]