工艺与制造英文2025
玻纤增强乙烯基酯/纳米Al₂O₃基体复合材料的拉挤工艺参数研究
Process parameters of glass-fiber-reinforced vinyl ester/nano-Al <sub>2</sub> O <sub>3</sub> matrix composites for pultrusion
Chin-Hsing Chen · Department of Chemical and Materials Engineering, Chinese Culture University, Yang-Ming-Shan, Taipei City, Taiwan
摘要整理
采用拉挤工艺制备了含纳米Al₂O₃的单向玻纤增强乙烯基酯复合材料。研究通过差示扫描量热法(DSC)分析，系统优化了拉挤工艺参数对复合材料性能的影响，重点考察了模具温度、拉挤速率、后固化条件、填料含量和玻纤含量等因素。DSC分析通过评估拉挤复合材料的固化度来确定最优模具温度。研究表明，拉挤速率增加会导致力学性能下降，需要合理平衡工艺参数。适当的后固化温度和时间能显著提升复合材料的力学性能，但过长的后固化时间会导致性能衰退或树脂基体过度固化。当纳米Al₂O₃掺量为2 phr(每百份树脂份数)、玻纤体积含量为75.6%时，弯曲强度和缺口Izod冲击强度达到峰值。超过此填料浓度后，这些性能出现下降，可能源于纳米颗粒团聚或纤维-基体界面相互作用减弱。相反，弯曲模量和硬度随纳米Al₂O₃和玻纤含量增加而提高，表明刚性和表面硬度得到增强。纳米Al₂O₃的加入有效降低了拉挤复合材料的收缩率，改善了表面质量。这一改进归因于纳米颗粒在固化过程中对基体收缩的限制作用。研究表明，精细优化拉挤工艺参数和填料含量对实现玻纤增强乙烯基酯/纳米Al₂O₃复合材料的优异力学性能和产品质量至关重要。
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