Methacryloxy-functionalized POSS as a multifunctional modifier for vinyl ester resin: Enhanced thermal resistance, water resistance, and flame retardancy

IF 7.4 2区化学 Q1 POLYMER SCIENCE

Polymer Degradation and Stability Pub Date : 2025-09-15 DOI:10.1016/j.polymdegradstab.2025.111672

Weiwei Zhang, Yixuan Ren, Li Li, Fengdan Wang, Yihu Tian, Boyang Lu, Binghan Zhang, Tingting Zhang

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引用次数: 0

Abstract

Methacryloxy-functionalized POSS (MA-POSS) was synthesized via hydrolytic condensation and used to modify vinyl ester resin (VER). Characterization (FTIR, NMR, MALDI-TOF MS) confirmed its structure with cage-like T₈/T₁₀/T₁₂ species. MA-POSS enhanced VER’s water/chemical resistance (contact angle up to 103.7°), transparency (85 % transmittance post-boiling), and thermal stability (48.7 % char at 900 °C for pure MA-POSS). Flame tests showed MA-POSS boosted VER’s LOI from 21.5 % to 43.7 (pure MA-POSS) with UL-94 V-0 rating, reducing p-HRR by 49.5 % and TSP by 65.8 %. Mechanisms involved Si-O barriers, radical scavenging (Si-OH/Si-O-Si), and reduced flammable volatiles, acting via both gas and condensed phases. This work highlights MA-POSS as a versatile modifier for VER, enabling intrinsic flame retardancy, water resistance, and optical stability, with potential as a standalone thermoset in high-performance applications.

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甲基丙烯氧基功能化POSS作为乙烯基酯树脂的多功能改性剂：增强耐热性、耐水性和阻燃性

采用水解缩合法制备了甲基丙烯氧基功能化POSS (MA-POSS)，并将其用于乙烯基酯树脂（VER）的改性。表征（FTIR， NMR, MALDI-TOF MS）证实其结构为笼状T8/T10/T12。MA-POSS增强了VER的耐水性/耐化学性（接触角高达103.7°），透明度（煮沸后透光率85%）和热稳定性（纯MA-POSS在900°C下烧焦48.7%）。火焰测试表明，在UL-94 V-0额定值下，MA-POSS将VER的LOI从21.5%提高到43.7%（纯MA-POSS）， p-HRR降低49.5%，TSP降低65.8%。机理包括Si-O屏障、自由基清除（Si-OH/Si-O- si）和减少可燃挥发物，通过气相和凝聚相起作用。这项工作强调了MA-POSS作为VER的通用改性剂，具有内在的阻燃性、耐水性和光学稳定性，具有在高性能应用中作为独立热固性材料的潜力。

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来源期刊

Polymer Degradation and Stability 化学-高分子科学

CiteScore

10.10

自引率

10.20%

发文量

325

审稿时长

23 days

期刊介绍： Polymer Degradation and Stability deals with the degradation reactions and their control which are a major preoccupation of practitioners of the many and diverse aspects of modern polymer technology. Deteriorative reactions occur during processing, when polymers are subjected to heat, oxygen and mechanical stress, and during the useful life of the materials when oxygen and sunlight are the most important degradative agencies. In more specialised applications, degradation may be induced by high energy radiation, ozone, atmospheric pollutants, mechanical stress, biological action, hydrolysis and many other influences. The mechanisms of these reactions and stabilisation processes must be understood if the technology and application of polymers are to continue to advance. The reporting of investigations of this kind is therefore a major function of this journal. However there are also new developments in polymer technology in which degradation processes find positive applications. For example, photodegradable plastics are now available, the recycling of polymeric products will become increasingly important, degradation and combustion studies are involved in the definition of the fire hazards which are associated with polymeric materials and the microelectronics industry is vitally dependent upon polymer degradation in the manufacture of its circuitry. Polymer properties may also be improved by processes like curing and grafting, the chemistry of which can be closely related to that which causes physical deterioration in other circumstances.