Heat-resistant luminescent films: a thermal study of fluorene/thiophene copolymer-elastomer blends

IF 2.8 4区工程技术 Q2 POLYMER SCIENCE

Macromolecular Research Pub Date : 2024-04-08 DOI:10.1007/s13233-024-00261-x

Agnaldo G. N. de Souza, Yasmin B. da Silva, Rebeca R. Rodrigues, Alessandra S. Menandro, Laura O. Péres

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Abstract

The luminescent properties of conjugated copolymers could be harmed due to thermo-oxidative degradation, limiting their applications. To overcome these problems, incorporating flexible and stable polymers, such as elastomers, is a simple and advantageous approach to obtaining luminescent, flexible, and thermo-resistant films. Thin films based on blends of a luminescent thiophene/fluorene copolymer (PTPF) and two elastomers, nitrile rubber (NBR) and natural rubber (NR) were prepared by a straightforward method, and thermal degradation tests were carried out at different temperatures. Oxidized structures in the PTPF chains can be observed using FTIR, and up to 330 °C for NR and to 395 °C for NBR, no significant changes were observable, however, over these temperatures, the blends also lost their luminescent properties. The characterization of the films at increasing degradation stages points to possible mechanisms associated with the degradation processes suggesting a strategy to guarantee incremented thermal protection to the conjugated material, maintaining its structural and optical properties at higher temperatures than ambient temperature, making these flexible-luminescent films interesting for applications in which the thermal resistance is a key factor to consider.

Graphical abstract

Thermal degradation study and obtention of thermo-resistant luminescent films based on blends of thiophene/fluorene copolymer and nitrile or natural rubber

Abstract Image

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耐热发光薄膜：芴/噻吩共聚物-弹性体混合物的热研究

共轭共聚物的发光特性可能会因热氧化降解而受到损害，从而限制其应用。为了克服这些问题，加入弹性和稳定的聚合物（如弹性体）是获得发光、柔韧和耐热薄膜的一种简单而有利的方法。我们采用一种简单的方法制备了基于发光噻吩/芴共聚物（PTPF）和两种弹性体（丁腈橡胶 (NBR) 和天然橡胶 (NR)）共混物的薄膜，并在不同温度下进行了热降解测试。使用傅立叶变换红外光谱（FTIR）可以观察到 PTPF 链中的氧化结构，NR 和 NBR 的温度分别高达 330 ℃ 和 395 ℃，但没有观察到明显的变化。对降解阶段不断增加的薄膜进行的表征指出了与降解过程相关的可能机制，并提出了一种策略，以确保增强共轭材料的热保护，在高于环境温度的条件下保持其结构和光学特性，从而使这些柔性发光薄膜在以热阻为关键因素的应用中大显身手。

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来源期刊

Macromolecular Research 工程技术-高分子科学

CiteScore

4.70

自引率

8.30%

发文量

100

审稿时长

1.3 months

期刊介绍： Original research on all aspects of polymer science, engineering and technology, including nanotechnology Presents original research articles on all aspects of polymer science, engineering and technology Coverage extends to such topics as nanotechnology, biotechnology and information technology The English-language journal of the Polymer Society of Korea Macromolecular Research is a scientific journal published monthly by the Polymer Society of Korea. Macromolecular Research publishes original researches on all aspects of polymer science, engineering, and technology as well as new emerging technologies using polymeric materials including nanotechnology, biotechnology, and information technology in forms of Articles, Communications, Notes, Reviews, and Feature articles.