{"title":"Synthesis of an Aliphatic Dianhydride Monomer and Its Colourless, Low Dielectric Constant Aliphatic Polyimides","authors":"Pradip Kumar Tapaswi","doi":"10.1134/s1560090424701306","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>An aliphatic dianhydride containing amide functionality (–NCOCH<sub>3</sub>), ethylenediamine-<i>N</i>,<i>N</i> '-disuccinic acid anhydride (EDSA) was synthesized via base catalyzed <i>N</i>-alkylation of aspartic acid with 1,2‑dibromoethane followed by dehydration of the <i>N</i>-alkylated product with Ac<sub>2</sub>O and pyridine. Four aliphatic polyimides (API) were prepared via two-step condensation polymerization of EDSA with four diamines (three straight chain aliphatic diamines and one alicyclic diamine). The polyimide film of EDSA with 4,4′-methylene bis(2-methyl cyclohexylamine) was almost colourless (cut of wavelength λ<sub>0</sub> = 312 nm and transmittance > 90% in the range of 450–800 nm). <i>T</i><sub>10</sub> (temperature of 10% weight loss) of API were in the range of 417–457°C and <i>T</i><sub>g</sub> of 149–178°C. The API films exhibited low dielectric constants of 2.31–2.92 at 1 MHz.</p>","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":null,"pages":null},"PeriodicalIF":1.0000,"publicationDate":"2024-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Polymer Science, Series B","FirstCategoryId":"1","ListUrlMain":"https://doi.org/10.1134/s1560090424701306","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
引用次数: 0
Abstract
An aliphatic dianhydride containing amide functionality (–NCOCH3), ethylenediamine-N,N '-disuccinic acid anhydride (EDSA) was synthesized via base catalyzed N-alkylation of aspartic acid with 1,2‑dibromoethane followed by dehydration of the N-alkylated product with Ac2O and pyridine. Four aliphatic polyimides (API) were prepared via two-step condensation polymerization of EDSA with four diamines (three straight chain aliphatic diamines and one alicyclic diamine). The polyimide film of EDSA with 4,4′-methylene bis(2-methyl cyclohexylamine) was almost colourless (cut of wavelength λ0 = 312 nm and transmittance > 90% in the range of 450–800 nm). T10 (temperature of 10% weight loss) of API were in the range of 417–457°C and Tg of 149–178°C. The API films exhibited low dielectric constants of 2.31–2.92 at 1 MHz.
期刊介绍：
Polymer Science, Series B is a journal published in collaboration with the Russian Academy of Sciences. Series B experimental and theoretical papers and reviews dealing with the synthesis, kinetics, catalysis, and chemical transformations of macromolecules, supramolecular structures, and polymer matrix-based composites (6 issues a year). All journal series present original papers and reviews covering all fundamental aspects of macromolecular science. Contributions should be of marked novelty and interest for a broad readership. Articles may be written in English or Russian regardless of country and nationality of authors. All manuscripts are peer reviewed
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