碱处理对不饱和聚酯树脂/苎麻布复合材料力学性能及界面形貌的影响被引量：11

EFFECT OF ALKALI TREATMENT ON MECHANICAL PROPERTIES AND INTERFACIAL MORPHOLOGY OF UNSATURATED POLYRSTER RESIN/RAMIE CLOTH COMPOSITES

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摘要本文以氢氧化钠(NaOH)溶液处理苎麻布,采用模压工艺制备不饱和聚酯(UP)树脂/苎麻布复合材料,研究碱液处理对苎麻布、复合材料力学性能及表面、界面形貌的影响。实验结果表明,经适当碱液处理后,苎麻布的拉伸断裂强力及拉伸断裂伸长率均增加,苎麻布的表面形貌更加光滑蓬松,复合材料的拉伸强度及弯曲强度均下降,但冲击强度及弯曲模量得到提高。30wt%NaOH溶液处理可使复合材料的弯曲模量达到最大值,166.38MPa,比未经碱液处理所制得复合材料的弯曲弹性模量提高了110%。碱处理后,复合材料的冲击断面上纤维被树脂紧紧包裹,纤维裸露拔出现象远不如未处理复合材料那样明显。 Sodium hydroxide（NaOH） solution is used to treat ramie cloth, and unsaturated polyester（UP） resin/ramie cloth composites are formed by compression molding process. The effects of alkali-treatment on the mechanical properties of both the ramie cloth and the composites are studied, and the effects of the treatment on the surface morphologies of the ramie cloth and the interfacial morphologies of the composites at break are also investigated. The results show that, after being alkali treated, ramie cloth has an increased tensile strength and also a greater elongation at break, and its surface becomes more smooth and relaxed. Both the impact strength and flexural modulus of the composites are increased while their tensile and flexural strengths decreased. After treating by 30wt% NaOH solution,the composites have the greatest flexural modulus, 166.38MPa,which is 110% increased from that of the composites without being treated, the ramie fibres in the cross-section of the treated composites at break were wrapped by resin tightly and the fibres never appear as baldly as those in the untreated composites.

作者雷文任超杨涛金晓明

机构地区南京林业大学

出处《玻璃钢／复合材料》 CAS CSCD 北大核心 2007年第5期31-35,共5页 Fiber Reinforced Plastics/Composites

基金江苏省高校自然科学研究项目(06KJD220083)

关键词不饱和聚酯树脂苎麻布复合材料氢氧化钠溶液力学性能界面形貌 unsaturated polyester resin ramie cloth composite sodium hydroxide solution mechanical property interfacial morphology

分类号 TB332 [一般工业技术—材料科学与工程] TQ323.42 [化学工程—合成树脂塑料工业]

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