90℃固化环氧预浸料的研制与性能

摘要

An epoxy system,could be cured at 90℃,was prepared for hot-melt prepreg.Figure of viscosity of resin sys-tem in different temperature and DSC curves showed that the resin system has towardly flowability ,the cure cycle was con-firmed by DSC,70℃/2 h﹢90℃/6 h .The prepreg has favorable process and mechanical properties ,the flexure strength was 1 408 MPa and short beam shear strength was 73 MPa.%开发了一种可以在90℃固化并适用于热熔法制备预浸料的环氧树脂体系。树脂体系在不同温度下的粘度表明树脂体系具有良好的流动性能，通过差示扫描量热仪（ DSC ）确定树脂体系的固化工艺为70℃/2 h＋90℃/6 h。通过研究辊面温度和压力对纤维浸透性的影响及树脂的性能，确定了制备预浸料的工艺参数。 T700碳纤维预浸料具有良好的工艺性能，其弯曲强度达1408 MPa，剪切强度达73 MPa。