CAJ | 학술논문

采用模压工艺制备不饱和聚酯树脂/大麻纤维复合材料,研究紫外线光老化试验对此种复合材料及氨水处理复合材料力学性能的影响,利用红外光谱(FTIR)技术研究老化前后复合材料结构的变化.研究结果表明,氨水处理大麻纤维可以改善复合材料的拉伸性能以及拉伸模量.未处理及氨水处理的复合材料,在试验一个周期后,两种复合材料的拉伸强度较老化前分别提高了10.8%和19.1%,未处理的复合材料的弯曲强度在两个试验周期时达到最大值.氨水处理的复合材料,在试验的第一周期时,拉伸模量下降最快,进一步老化之后,下降幅度明显减缓.氨水处理的复合材料的拉伸模量在第三个试验周期结束时,弯曲模量和冲击强度比未老化前分别上升6.3%和25.3%.FTIR显示,老化后,两种复合材料的吸收峰强度减弱,但氨水处理的复合材料吸收峰强度比未处理的强.
채용모압공예제비불포화취지수지/대마섬유복합재료,연구자외선광노화시험대차충복합재료급안수처리복합재료역학성능적영향,이용홍외광보(FTIR)기술연구노화전후복합재료결구적변화.연구결과표명,안수처리대마섬유가이개선복합재료적랍신성능이급랍신모량.미처리급안수처리적복합재료,재시험일개주기후,량충복합재료적랍신강도교노화전분별제고료10.8%화19.1%,미처리적복합재료적만곡강도재량개시험주기시체도최대치.안수처리적복합재료,재시험적제일주기시,랍신모량하강최쾌,진일보노화지후,하강폭도명현감완.안수처리적복합재료적랍신모량재제삼개시험주기결속시,만곡모량화충격강도비미노화전분별상승6.3%화25.3%.FTIR현시,노화후,량충복합재료적흡수봉강도감약,단안수처리적복합재료흡수봉강도비미처리적강.
Unsaturated polyester resin/hemp fiber composites are formed by compression molding process, UV ageing test is carried out for both untreated and ammonia treated composites, the ageing cycles on the mechanical properties of the composites are studied, and FTIR technology is applied to characterize the structures of the compsores. The results show that, treating hemp fiber with ammonia can improve the tensile strengths and tensile modulli of the composites. The composites, either treated or untreated, get the greatest tensile strengths after one testing eycle, 10.8% and 19.1% increased from those of the unaged composites respectively; the flexural strengths, tensile modulli and flexural modulli of the untreated composites become the greatest ones when 2 periodically aged. As for the ammonia treated composites, their tensile moduli and flexural strengths decrease dramatically during the first aging period, then continue to decrease but much more slowly. On the contrary, their flexural moduUi and impact strengths are increased by 6.3% and 25.3% respectively from those of the unaged composites after 3 aging cycles. FTIR spectra shows that, the ammonia treated composites have stronger peaks than the untreated ones though the absorbence peaks of both the two composites become weaker after UV aging.