Ambient cure PUSS-epoxy matrices for marine composites

作者：Tucker Samuel J; Fu Bruce; Kar Sritama; Heinz Stephen; Wiggins Jeffrey S^*

来源：Composites Part A: Applied Science and Manufacturing , 2010, 41(10): 1441-1446.

DOI：10.1016/j.compositesa.2010.06.005

• Polymer-matrix composites
• Nano-structures
• Thermomechanical
• Resin transfer molding

A room-temperature cure epoxy consisting of diglycidyl ether of bisphenol-F (DGEBF) and diethylene triamine (DETA) was modified with 26.5 wt.% and 63.5 wt.% octaglycidyl polyhedral oligomeric silsesquioxane (POSS) to investigate elevated temperature thermomechanical performance. Composites fabricated using vacuum assist resin transfer molding (VARTM) were compared to vinylester and epoxy standards. POSS modified matrices were low viscosity of 0.25-0.40 Pa s. Although T(g) was 20% lower than vinylester, we observed an increase of >300% in 150 degrees C storage modulus, >50% in tensile modulus, >35% in flexural modulus, and the complete elimination of a heat distortion temperature (HDT) up to 200 degrees C. The matrices demonstrated an excellent balance of flow, wetting, and pot-life behaviors making them attractive alternatives for ambient cure marine applications.

• 出版日期2010-10