Aromatic (Co)polycarbonates bearing pendant norbornenyl groups: Synthesis, characterization and post-polymerization modification

IF 1.8 4区化学 Q3 POLYMER SCIENCE

High Performance Polymers Pub Date : 2024-08-28 DOI:10.1177/09540083241279209

Aniket A Talanikar, Samadhan S Nagane, Prakash P Wadgaonkar, Gajanan S Rashinkar

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Abstract

A homo- and three co-polycarbonates (PC-NBs) bearing pendant norbornenyl groups were synthesized via solution polycondensation of triphosgene with 4, 4'-(bicyclo (2.2.1) hept-5-en-2 yl methylene) bis (2-methoxyphenol) (BPA-NB) or various mol % compositions of BPA-NB and bisphenol-A, respectively. 1H-NMR spectroscopy confirmed the chemical structure and composition of PC-NBs. Inherent viscosity and number-average molecular weight (Mn) values of PC-NBs were in the range 0.44 – 0.64 dL g−1 and 21,800 – 34,100 g mol−1, respectively, indicating the formation of polymers of medium to reasonably high molecular weights. Tough, transparent, and flexible films of PC-NBs could be cast from chloroform solution. X-Ray diffraction studies indicated the amorphous nature of PC-NBs. Glass transition temperature (Tg) values, determined by DSC analysis, of PC-NBs were in the range 154 – 175°C and Tg values increased with the increase in mol % of BPA-NB. The post-polymerization modification of a representative PC-NB was demonstrated using 3,6-diphenyl-1,2,4,5-tetrazine via tetrazine-ene reaction.

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带有降冰片烯基的芳香族 (Co) 聚碳酸酯：合成、表征和聚合后改性

通过三光气与 4, 4'-(bicyclo (2.2.1) hept-5-en-2 yl methylene) bis (2-methoxyphenol) (BPA-NB) 或 BPA-NB 和双酚-A 的不同摩尔百分比组成的溶液缩聚，分别合成了带有悬垂降冰片烯基的均聚碳酸酯（PC-NBs）和三种共聚碳酸酯（PC-NBs）。1H-NMR 光谱证实了 PC-NB 的化学结构和成分。PC-NBs 的固有粘度和数均分子量 (Mn) 值范围分别为 0.44 - 0.64 dL g-1 和 21,800 - 34,100 g mol-1，表明形成了中等至相当高分子量的聚合物。从氯仿溶液中可以浇铸出坚韧、透明和柔韧的 PC-NB 薄膜。X 射线衍射研究表明 PC-NB 具有无定形性质。通过 DSC 分析测定，PC-NB 的玻璃转化温度 (Tg) 值在 154 - 175°C 之间，且 Tg 值随着 BPA-NB 摩尔百分比的增加而增加。使用 3,6-二苯基-1,2,4,5-四嗪通过四嗪烯反应对具有代表性的 PC-NB 进行了聚合后改性。

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来源期刊

High Performance Polymers 化学-高分子科学

CiteScore

4.20

自引率

14.30%

发文量

106

审稿时长

1.2 months

期刊介绍： Health Services Management Research (HSMR) is an authoritative international peer-reviewed journal which publishes theoretically and empirically rigorous research on questions of enduring interest to health-care organizations and systems throughout the world. Examining the real issues confronting health services management, it provides an independent view and cutting edge evidence-based research to guide policy-making and management decision-making. HSMR aims to be a forum serving an international community of academics and researchers on the one hand and healthcare managers, executives, policymakers and clinicians and all health professionals on the other. HSMR wants to make a substantial contribution to both research and managerial practice, with particular emphasis placed on publishing studies which offer actionable findings and on promoting knowledge mobilisation toward theoretical advances. All papers are expected to be of interest and relevance to an international audience. HSMR aims at enhance communication between academics and practitioners concerned with developing, implementing, and analysing health management issues, reforms and innovations primarily in European health systems and in all countries with developed health systems. Papers can report research undertaken in a single country, but they need to locate and explain their findings in an international context, and in international literature.