【摘要】 本文介绍采用短麻纤维(SF)和短玻纤(GF)混杂增强PVC基体,测定了复合材料的弯曲强度、弯曲模量、无缺口冲击强度以及耐水浸泡性能,并探讨了这一复合材料在水浸泡前后的力学性能及其界面行为.结果表明,此种复合材料在弯曲模量和无缺口冲击强度上存在正的混杂效应,而弯曲强度存在负的混杂效应;经水浸泡后,复合材料的弯曲强度、弯曲摸量和冲击强度都有不同程度的下降,而对于纯PVC基体,水浸泡后的弯曲强度和弯曲模量反而有所提高,因此可以认为,水浸泡对纯PVC基体在弯曲性能方面无不良影响,水分主要对纤维与基体的界面产生不良作用,导致复合材料性能下降.更多还原

【Abstract】 This paper deals with the sisal and glass fibers hybrid reinforced modification of PVC, the determination of the bending strength and modulus, the non-notched impact strength, and the water-resistance of the hybrid reinforced PVC was also made, the mechanical properties and the interfacial behaviour of the reinforced PVC before and after water immersion were studied. The results showed that a positive "hybrid effect" could be observed on the bending modulus and non-notched impact strength of the PVC compoxsite,and a negative "hybrid effective" could be observed on the bending strength of the composite; the bending strength and modulus, as well as the impact strength, decreased in varying degree, while those of pure PVC resin increased after water immersion. So it could be believed that water immersion had no bad effect on the bending properties of the basic PVC resin, but had harmful effect on the interface of the fiber and basic resin, resulting in a decrease of the properties of the composites.更多还原