Solvent-Assisted Synthesis of Polyborodimethylsiloxane (PBDMS) and its Rheological Research

IF 2.6 4区化学 Q3 POLYMER SCIENCE

Journal of Polymer Research Pub Date : 2025-05-14 DOI:10.1007/s10965-025-04419-8

Ravinder Kaur, Sanjeev Kumar Verma, Rajeev Mehta

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引用次数: 0

Abstract

Polyborodimethylsiloxanes (PBDMS) are supramolecular elastomers known for their unique viscoelastic and shear-stiffening properties, attributed to weak Si–O: B dative bonding and hydrogen bonding. This enables a transition between liquid-like and elastic behavior, making PBDMS suitable for smart coatings, flexible electronics, and energy-dissipating materials. PBDMS is also a key component in strain-sensitive Interpenetrating Polymer Networks (IPNs), such as the commercially available D3O, which combines PBDMS with polyurethane matrix. Most PBDMS synthesis studies focus on high-temperature bulk methods (200 °C), which, despite being contamination-free, suffer from poor mixing, chain scission, and scalability issues. This study explores a solvent-assisted approach using hydroxy-terminated PDMS of varying viscosities and boric acid (BA) at 120 °C in toluene, ensuring uniform mixing and controlled molecular scission. Fourier transform infrared (FTIR) spectroscopy confirmed Si–O-B linkage formation within 2 h, while gel permeation chromatography (GPC) showed a 90.4% molecular weight reduction. Rheological analysis indicated increased storage (G’) and loss (G’’) moduli, with elastic behavior dominating after 6 h. This solvent-assisted method provides a scalable and reproducible alternative for PBDMS synthesis, offering precise control over viscoelastic properties for advanced applications.

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溶剂辅助合成聚硼二甲基硅氧烷（PBDMS）及其流变学研究

聚硼二甲基硅氧烷（PBDMS）是一种超分子弹性体，因其弱Si-O: B键和氢键而具有独特的粘弹性和剪切硬化性能。这使得PBDMS能够在类液体和弹性行为之间转换，使其适用于智能涂料、柔性电子产品和耗能材料。PBDMS也是应变敏感互穿聚合物网络（ipn）的关键组成部分，例如市售的d30，它将PBDMS与聚氨酯基体结合在一起。大多数PBDMS合成研究都集中在高温体法（200°C）上，尽管这种方法无污染，但存在混合不良、链断裂和可扩展性问题。本研究探索了一种溶剂辅助方法，使用不同粘度的羟基端PDMS和硼酸（BA）在120°C的甲苯中，确保均匀混合和控制分子分裂。傅里叶变换红外光谱（FTIR）证实在2 h内形成Si-O-B键，凝胶渗透色谱（GPC）显示分子量降低90.4%。流变学分析表明，储存（G’）和损失（G’）模量增加，6小时后弹性行为占主导地位。这种溶剂辅助方法为PBDMS合成提供了一种可扩展和可重复的替代方法，为高级应用提供了对粘弹性特性的精确控制。

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来源期刊

Journal of Polymer Research 化学-高分子科学

CiteScore

4.70

自引率

7.10%

发文量

472

审稿时长

3.6 months

期刊介绍： Journal of Polymer Research provides a forum for the prompt publication of articles concerning the fundamental and applied research of polymers. Its great feature lies in the diversity of content which it encompasses, drawing together results from all aspects of polymer science and technology. As polymer research is rapidly growing around the globe, the aim of this journal is to establish itself as a significant information tool not only for the international polymer researchers in academia but also for those working in industry. The scope of the journal covers a wide range of the highly interdisciplinary field of polymer science and technology, including: polymer synthesis; polymer reactions; polymerization kinetics; polymer physics; morphology; structure-property relationships; polymer analysis and characterization; physical and mechanical properties; electrical and optical properties; polymer processing and rheology; application of polymers; supramolecular science of polymers; polymer composites.