Detection of β-transition in polyesters via clusteroluminescence.

IF 10.7 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Xiang Li, Xiong Liu, Yanbing Lv, Ziteng Zhang, Kailuo Chen, Bo Chu, Jing Zhi Sun, Haoke Zhang, Xinghong Zhang, Ben Zhong Tang
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引用次数: 0

Abstract

The secondary transition of polymer chains is crucial for understanding its multiple properties, yet conventional methods to measure the corresponding transition temperature often face limitations in sensitivity and practicality. Fluorescence spectroscopy, renowned for its real-time response, high sensitivity, and non-destructive nature, has emerged as a powerful alternative. However, existing fluorescence-based techniques typically rely on external probes and exhibit limited sensitivity to sub-glass transitions. Herein, we introduce a novel approach leveraging clusteroluminescence (CL), a unique luminescence generated from the through-space interactions between polymer chains, to monitor secondary transitions in polyesters with unprecedented sensitivity. By analyzing the first derivative of fluorescence intensity with respect to temperature, we successfully identify both the glass transition temperature (Tg) and the sub-Tg transition (Tβ). This work not only demonstrates the potential of CL as a robust tool for probing polymer dynamics, but also represents the first probe-free method for simultaneously monitoring Tg and Tβ transitions. Our findings open up new avenues for advanced material characterization and deepen the understanding of polymer behavior.

聚簇发光法检测聚酯中β跃迁。
聚合物链的二次转变对于理解其多种性质至关重要,但传统的测量转变温度的方法在灵敏度和实用性方面往往存在局限性。荧光光谱以其实时响应、高灵敏度和非破坏性而闻名,已成为一种强大的替代方案。然而,现有的基于荧光的技术通常依赖于外部探针,并且对玻璃下跃迁的灵敏度有限。在这里,我们引入了一种利用簇发光(CL)的新方法,这种独特的发光是由聚合物链之间的空间相互作用产生的,以前所未有的灵敏度监测聚酯中的二次转变。通过分析荧光强度对温度的一阶导数,我们成功地确定了玻璃化转变温度(Tg)和亚Tg转变(Tβ)。这项工作不仅证明了CL作为探测聚合物动力学的强大工具的潜力,而且代表了第一个同时监测Tg和Tβ跃迁的无探针方法。我们的发现为先进的材料表征开辟了新的途径,加深了对聚合物行为的理解。
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来源期刊
Materials Horizons
Materials Horizons CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
18.90
自引率
2.30%
发文量
306
审稿时长
1.3 months
期刊介绍: Materials Horizons is a leading journal in materials science that focuses on publishing exceptionally high-quality and innovative research. The journal prioritizes original research that introduces new concepts or ways of thinking, rather than solely reporting technological advancements. However, groundbreaking articles featuring record-breaking material performance may also be published. To be considered for publication, the work must be of significant interest to our community-spanning readership. Starting from 2021, all articles published in Materials Horizons will be indexed in MEDLINE©. The journal publishes various types of articles, including Communications, Reviews, Opinion pieces, Focus articles, and Comments. It serves as a core journal for researchers from academia, government, and industry across all areas of materials research. Materials Horizons is a Transformative Journal and compliant with Plan S. It has an impact factor of 13.3 and is indexed in MEDLINE.
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