A Strategy for Synergistically Plasticizing the Melt Processing of Polyvinyl Alcohol Using a Green Molecule: Reconstructing Hydrogen Bond Networks With Renewable Trehalose

IF 3.9 3区化学 Q2 POLYMER SCIENCE

Journal of Polymer Science Pub Date : 2026-06-15 Epub Date: 2026-04-21 DOI:10.1002/pola.70147

Ying Su, Hanyu Zhou, Hao Dong, Xinyu Zhang, Xuan Zhang, Qing Su, Wei Zeng

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Abstract

Poly(vinyl alcohol) (PVA) is a biodegradable polymer with poor melt processability. This intrinsic property necessitates energy-intensive, solvent-dependent processing methods. This study introduces a green strategy using trehalose, a non-toxic disaccharide, as a “molecular director” to reconfigure PVA's hydrogen-bond network. Combined with glycerol and PEG400, trehalose acts as a rigid “hydrogen-bond reconfiguration center.” It competitively replaces PVA–PVA hydrogen bonds with stronger PVA–trehalose interactions. The interaction energy ranges from 29 to 31 kJ/mol. This synergistic mechanism increases free volume by 36.69%. Consequently, melt viscosity at 230°C is reduced to 1/15 of that of pristine PVA. A quantitative power-law model (R ² = 0.996) links free volume to viscosity, enabling predictive processing design. This work identifies a molecular mechanism by which a carbohydrate motif regulates hydrogen-bonded polymer networks and provides an applicable approach for tuning the dynamics and melt behavior of strongly associated polymers.

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用绿色分子协同增塑化聚乙烯醇熔体加工的策略：用可再生海藻糖重建氢键网络

聚乙烯醇（PVA）是一种可生物降解的聚合物，具有较差的熔融加工性。这种固有性质需要能源密集型，溶剂依赖的处理方法。本研究介绍了一种绿色策略，使用海藻糖（一种无毒的双糖）作为“分子指导者”来重新配置PVA的氢键网络。海藻糖与甘油和PEG400结合，作为一个刚性的“氢键重构中心”。它以更强的pva -海藻糖相互作用竞争性地取代PVA-PVA氢键。相互作用能在29 ~ 31 kJ/mol之间。该协同机制使自由体积增加36.69%。因此，熔体粘度在230°C降低到原始PVA的1/15。定量幂律模型（r2 = 0.996）将自由体积与粘度联系起来，从而实现预测处理设计。这项工作确定了碳水化合物基序调节氢键聚合物网络的分子机制，并为调节强结合聚合物的动力学和熔融行为提供了一种适用的方法。

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来源期刊

Journal of Polymer Science POLYMER SCIENCE-

CiteScore

6.30

自引率

5.90%

发文量

264

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.