纳米二氧化硅接枝马来酸酐增容非混相乙烯-醋酸乙烯共聚物/热塑性聚氨酯共混物

IF 4.5 2区化学 Q2 POLYMER SCIENCE

Polymer Pub Date : 2025-05-03 DOI:10.1016/j.polymer.2025.128486

Caishi He , Zhipeng Liu , Jiadong Yang , Zhen Jia , Zebao Rui

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引用次数: 0

摘要

本文设计了纳米二氧化硅颗粒接枝马来酸酐（SiO2-g-MAH），以提高乙烯-醋酸乙烯共聚物/热塑性聚氨酯（EVA/TPU）非混相共混体系的相容性。SiO2-g-MAH表面的硅烷侧链可以与EVA和TPU的分子链发生物理缠结，而SiO2-g-MAH表面的马来酸酐基团可以与TPU发生反应形成交联结构。这使得SiO2-g-MAH能够锚定在界面上，增强界面附着力，显著改善EVA/TPU共混物的相容性。结果表明，共混物的分散相尺寸明显减小，其粘接性能和力学性能明显提高。当SiO2-g-MAH添加量为2 wt.%时，TPU分散相尺寸由原来的3.38±0.59 μm减小到0.69±0.05 μm，共混物的抗剪强度和抗拉强度分别达到8.76 MPa和15.51 MPa，比未添加SiO2-g-MAH的EVA/TPU共混物分别提高了159.2%和45.1%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Compatibilization of immiscible ethylene-vinyl acetate copolymer/thermoplastic polyurethane blends by nano-silica particles grafted maleic anhydride

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Compatibilization of immiscible ethylene-vinyl acetate copolymer/thermoplastic polyurethane blends by nano-silica particles grafted maleic anhydride

In this work, the nano-silica particles grafted maleic anhydride (SiO₂-g-MAH) was designed to enhance the compatibility of the ethylene-vinyl acetate copolymer/thermoplastic polyurethane (EVA/TPU) immiscible blend system. The silane side chains on SiO₂-g-MAH can physically entangle with the molecular chains of both EVA and TPU, while the maleic anhydride groups on the surface of SiO₂-g-MAH can react with TPU to form crosslinking structures. This enables SiO₂-g-MAH to anchor at the interface, enhances interfacial adhesion and improves significantly the compatibility of the EVA/TPU blends. As a result, the dispersed phase size of the blends significantly decreases, meanwhile, their adhesive and mechanical properties get noticeably improved. When the addition amount of SiO₂-g-MAH is 2 wt%, the size of the TPU dispersed phase decreases from the original 3.38 ± 0.59 μm to 0.69 ± 0.05 μm, and the lap shear strength and tensile strength of the blend reach respectively 8.76 MPa and 15.51 MPa, representing enhancements of 159.2 % and 45.1 % compared to the EVA/TPU blends without SiO₂-g-MAH.

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来源期刊

Polymer 化学-高分子科学

CiteScore

7.90

自引率

8.70%

发文量

959

审稿时长

32 days

期刊介绍： Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics. The main scope is covered but not limited to the following core areas: Polymer Materials Nanocomposites and hybrid nanomaterials Polymer blends, films, fibres, networks and porous materials Physical Characterization Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films Polymer Engineering Advanced multiscale processing methods Polymer Synthesis, Modification and Self-assembly Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization Technological Applications Polymers for energy generation and storage Polymer membranes for separation technology Polymers for opto- and microelectronics.