Modified epoxy composites reinforced with various glass fiber contents up to 12 wt% were prepared by a simple fabrication method which involved mechanical stirring, hot pressing and post-curing. The effects of matrix modification with liquid epoxidized natural rubber (LENR) and fiber treatment with silane coupling agent on the physical, mechanical and dynamic thermal properties were examined. The modified epoxy composites had reduced density, water resistance and hardness. When compared to untreated glass fiber, the epoxy/LENR composites containing treated fiber exhibited improved water resistance and hardness property with comparable composite density. At 9 wt% of treated fiber, it revealed the highest hardness value of 65.6 and reduced diffusion coefficient of 2.2013 × 10⁻⁷ mm²s⁻¹. The excellent storage modulus and interfacial adhesion (lower Tan δ) were obtained for treated glass fiber composites. Based on environmental stress cracking resistance evaluation under corrosive mediums, the fiber treatment had positively contributed to the degradation mechanism.

通过简单的制造方法，包括机械搅拌，热压和后固化，制备了各种玻璃纤维含量高达12 wt％的改性环氧复合材料。考察了用液态环氧天然橡胶（LENR）进行基体改性和用硅烷偶联剂进行纤维处理对物理，机械和动态热性能的影响。改性的环氧复合材料具有降低的密度，耐水性和硬度。当与未处理的玻璃纤维相比时，含有处理过的纤维的环氧/ LENR复合材料表现出改进的耐水性和硬度性能，且复合材料密度相当。在9 wt％的处理纤维下，它显示出最高的硬度值65.6和降低的扩散系数2.2013×10 ^-7 mm ² s^-1。经处理的玻璃纤维复合材料具有优异的储能模量和界面粘合性（较低的Tanδ）。根据在腐蚀性介质下的耐环境应力开裂性评估，纤维处理对降解机理起到了积极作用。