Emre Kinaci, John J. La Scala, Erde Can, Giuseppe R. Palmese
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引用次数: 0
摘要
在这项研究中,对两种基于卡旦醇的环氧树脂进行了甲基丙烯酸化处理,一种是 NC514,其每个分子中的环氧化合物少于两个;另一种是侧链环氧化卡旦醇缩水甘油醚(SCECGE),其每个分子中的环氧化合物约为 2.45 个(1.0 个酚类环氧化合物+1.45 个脂肪族环氧化合物)。甲基丙烯酸化的卡旦醇基 NC514(NC514VE)和 SCECGE(SCECGEVE)环氧树脂在乙烯基酯配方中用作交联剂单元,甲基丙烯酸化月桂酸(MFA)和苯乙烯(ST)分别作为生物基和合成基活性稀释剂,浓度各异(10-40 wt%)。通过傅立叶变换红外光谱研究了树脂的固化反应,并确定了不同交联剂单元在 ST 和 MFA 存在下的聚合程度。我们的机械和热力学特性分析表明,与使用市售同类产品 NC514VE 制备的样品相比,使用卡旦醇基 SCECGEVE 交联剂单元制备的 VER 配方在性能上有明显改善。由于侧链官能化和交联效果更好,SCECGEVE 的这些性能也可与甲基丙烯酸石油基双酚 A 乙烯基酯二缩水甘油醚(DGEBAVE)配方媲美,而 NC514VE 配方则不同。
Preparation and characterization of cardanol based vinyl ester resins as cross-linker units
In this study, two cardanol based epoxidized resins, NC514 with less than two epoxies per molecule and side chain epoxidized cardanol glycidyl ether (SCECGE) with approximately 2.45 epoxies (1.0 phenolic+1.45 aliphatic epoxies) per molecule were methacrylated. The methacrylated versions of cardanol based NC514 (NC514VE) and SCECGE (SCECGEVE) epoxy resins were used as cross-linker units in vinyl ester formulations with methacrylated lauric acid (MFA) and styrene (ST) as bio-based and synthetic based reactive diluents respectively, at various concentrations (10–40 wt%). The curing reactions of the resins were studied via FTIR and the extent of polymerization was determined for different cross-linker units in the presence of ST and MFA. Our mechanical and thermomechanical characterizations showed that VER formulations prepared with cardanol based SCECGEVE cross-linker unit have significantly improved properties than the samples prepared with commercially available counterpart NC514VE using either reactive diluent. These properties of SCECGEVE were also comparable with to that of methacrylated petroleum-based diglycidyl ether of bisphenol A vinyl ester (DGEBAVE) formulations unlike NC514VE formulations due to more effective side chain functionalization and cross-linking.
期刊介绍:
The Journal of Applied Polymer Science is the largest peer-reviewed publication in polymers, #3 by total citations, and features results with real-world impact on membranes, polysaccharides, and much more.