PREPARATION AND CHARACTERIZATION OF NOVEL VINYL ESTER FORMULATIONS DERIVED FROM CARDANOL

摘要

Two commercially available cardanol based epoxy resins, NC514 which is a bis-phenol type diepoxyrnresin and LITE2513HP which is a cardanol based mono-epoxy resins were subjected tornesterification reaction via methacrylic acid together with a commercially available epoxy resinrnDGEBA (EPON 828). Methacrylated NC514 resin (NC514VE) was used as the cross-linker unitrnand methacrylated LITE2513HP (LITEVE) was used as the reactive diluent in both conventionalrnDGEBAVE and cardanol based NC514VE resin at changing concentrations. For comparison, resinrnformulations of NC514VE using styrene as the reactive diluent with changing concentrations werernalso prepared. The methacrylated products were characterized via 1H-NMR spectroscopy and acidrnnumber titrations. The viscosities of liquid resin formulations were tested at 30oC and the thermomechanicalrnproperties were evaluated via Dynamic Mechanical Analysis (DMA) and mechanicalrnproperties were determined via tensile tests. The effect of diluent content on some importantrnproperties such as viscosity, glass transition temperature (Tg), and tensile modulus (G’) were alsornevaluated.