In this article, gum rosin-based hyperbranched vinyl ester resin (VPEMPAE) was synthesized from maleic anhydride-modified gum rosin adduct (MPA). This adduct (MPA) was reacted with pentaerythritol to obtain esterified adduct (PEMPA). The PEMPA adduct was epoxidized using epichlorohydrin and KOH as a catalyst to give epoxy resin (PEMPAE). The epoxide rings were then reacted with methacrylic acid to synthesize vinyl ester resin (VPEMPAE). The lignin modeled compounds (LMCs), methacrylated eugenol (ME), and methacrylated guaiacol (MG) were used as bio-based reactive monomers for vinyl ester resin. The chemical structures of all the products were studied using FT-IR, 1 H-NMR, 13 C-NMR, and DEPT-135° spectroscopic analysis. The dynamic curing study of cured samples was done using DSC. Thermogravimetric analysis of these samples was performed using TGA at a heating rate of 10 °C min −1 . Mechanical properties such as compression, flexural, and tensile strengths of VPEMPAE samples were also determined using a universal testing machine. Some preliminary coating tests were also performed to determine the chemical resistance of these cured resins and morphological studies on these coatings were also conducted using SEM. The results of this study showed better performance of rosin-derived vinyl ester resin cured with reactive diluent ME as compared to MG and commercially based styrene.

中文翻译：

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多功能季戊四醇衍生的高性能松香改性超支化乙烯基酯树脂

在本文中，以马来酸酐改性的松香加合物（MPA）为原料合成了松香基超支化乙烯基酯树脂（VPEMPAE）。该加合物（MPA）与季戊四醇反应得到酯化加合物（PEMPA）。使用表氯醇和 KOH 作为催化剂将 PEMPA 加合物环氧化，得到环氧树脂 (PEMPAE)。然后环氧化物环与甲基丙烯酸反应以合成乙烯基酯树脂(VPEMPAE)。木质素模拟化合物 (LMC)、甲基丙烯酸丁香酚 (ME) 和甲基丙烯酸愈创木酚 (MG) 被用作乙烯基酯树脂的生物基反应性单体。使用FT-IR、 1 H-NMR、 13 C-NMR和DEPT-135°光谱分析研究了所有产物的化学结构。固化样品的动态固化研究使用 DSC 进行。这些样品的热重分析使用TGA以10°C min -1 的加热速率进行。还使用万能试验机测定了 VPEMPAE 样品的机械性能，如压缩、弯曲和拉伸强度。还进行了一些初步涂层测试以确定这些固化树脂的耐化学性，并且还使用 SEM 对这些涂层进行了形态研究。该研究的结果表明，与 MG 和商用苯乙烯相比，用活性稀释剂 ME 固化的松香衍生乙烯基酯树脂具有更好的性能。还进行了一些初步涂层测试以确定这些固化树脂的耐化学性，并且还使用 SEM 对这些涂层进行了形态研究。该研究的结果表明，与 MG 和商用苯乙烯相比，用活性稀释剂 ME 固化的松香衍生乙烯基酯树脂具有更好的性能。还进行了一些初步涂层测试以确定这些固化树脂的耐化学性，并且还使用 SEM 对这些涂层进行了形态研究。该研究的结果表明，与 MG 和商用苯乙烯相比，用活性稀释剂 ME 固化的松香衍生乙烯基酯树脂具有更好的性能。