Preparation and properties of vinyltriethoxysilane-modified waterborne acrylate resins

IF 4.1 2区化学 Q2 POLYMER SCIENCE

Polymer Pub Date : 2024-11-04 DOI:10.1016/j.polymer.2024.127781

Jinmei Ma , Shiyan Zhou , Yaqi Wang , Rong Chen , Shuai Wang , Fenghua Zhang , Yu-Peng He

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Abstract

Silicone-modified waterborne polyacrylate resins were created using semi-continuous emulsion polymerization. Vinyltriethoxysilane (A151) was used as a modified monomer. Two-component waterborne coatings were then prepared by adding poly (hexamethylene diisocyanate) (PHDI) as a curing agent to the A151-modified polyacrylate resins for the first time. The reaction mechanism of the acrylate copolymer and the curing mechanism of the coating were demonstrated using Fourier transform infrared spectroscopy (FTIR). The modification significantly improved the hydrophobicity and thermal stability of the coating, as confirmed by increased contact angle measurement and thermogravimetric (TG) analysis. Water absorption was reduced from 35 % to 10 % while maintaining optimal adhesion levels. Additionally, the low glass transition temperature of the acrylate resin emulsion film was investigated by differential scanning calorimetry (DSC), indicating excellent coating film properties for the two-component waterborne resin. The modification with PHDI not only significantly increased the water resistance time of the polymer coating but also improved the coating hardness while maintaining excellent adhesion of the silicon-containing resin to the substrate. This study introduces a new method for synthesizing low-cost, high-performance waterborne acrylate resins.

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乙烯基三乙氧基硅烷改性水性丙烯酸酯树脂的制备与性能

采用半连续乳液聚合法制造了硅改性水性聚丙烯酸酯树脂。改性单体为乙烯基三乙氧基硅烷（A151）。然后，首次在 A151 改性聚丙烯酸酯树脂中加入聚（六亚甲基二异氰酸酯）（PHDI）作为固化剂，制备出了双组分水性涂料。傅立叶变换红外光谱（FTIR）证明了丙烯酸酯共聚物的反应机理和涂层的固化机理。接触角测量和热重（TG）分析证实，改性大大提高了涂层的疏水性和热稳定性。在保持最佳附着力的同时，吸水率从 35% 降至 10%。此外，通过差示扫描量热法（DSC）对丙烯酸酯树脂乳液膜的低玻璃化转变温度进行了研究，结果表明这种双组分水性树脂具有极佳的涂膜性能。用 PHDI 进行改性不仅能显著延长聚合物涂层的耐水时间，还能提高涂层硬度，同时保持含硅树脂与基材的良好粘附性。本研究介绍了一种合成低成本、高性能水性丙烯酸酯树脂的新方法。

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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.