CAJ | 학술논문

以玉米淀粉和聚乳酸(PLA)为原料，甘油为增塑剂，通过熔融挤出法制备玻璃纤维增强淀粉/PLA复合材料。研究了玻璃纤维用量对复合材料断面形貌、力学性能、耐水性能和熔融性能的影响。结果表明，随着玻璃纤维用量增多，纤维与基体间的机械咬合作用使复合材料断裂面变得粗糙；纤维用量超过4％后，纤维之间产生相互缠结，对复合材料基体的增强效果减弱，使得断裂面的粗糙度下降。受玻璃纤维对基体增强效果的影响，随着纤维用量增多，复合材料的拉伸强度、弯曲强度和断裂伸长率都逐渐增大，吸水率逐渐降低，玻璃纤维用量为4％达到临界值。复合材料的储能模量随着玻璃纤维用量增多而增大，而熔融指数和复数粘度却随着玻璃纤维用量增多而降低。
이옥미정분화취유산(PLA)위원료，감유위증소제，통과용융제출법제비파리섬유증강정분/PLA복합재료。연구료파리섬유용량대복합재료단면형모、역학성능、내수성능화용융성능적영향。결과표명，수착파리섬유용량증다，섬유여기체간적궤계교합작용사복합재료단렬면변득조조；섬유용량초과4％후，섬유지간산생상호전결，대복합재료기체적증강효과감약，사득단렬면적조조도하강。수파리섬유대기체증강효과적영향，수착섬유용량증다，복합재료적랍신강도、만곡강도화단렬신장솔도축점증대，흡수솔축점강저，파리섬유용량위4％체도림계치。복합재료적저능모량수착파리섬유용량증다이증대，이용융지수화복수점도각수착파리섬유용량증다이강저。
Glass fiber reinforced starch/polylactic acid (PLA)composites were prepared by melt extrusion with corn starch and PLA as raw materials and glycerol as plasticizer.The effect of glass fiber content on the fracture morphology,mechanical properties,water resistance and melting properties of composites were studied.The results show that,with the increasing of glass fiber content,mechanical interlocking between fiber and the ma-trix of composites was result in the roughness of fracture surface.When fiber content was more than 4%,the entanglement between the fibers was generated.Then the enhancement effect for composite matrix was weak-ened,which made the roughness of fracture surface was decreased.Affected by the enhanced effect of glass fiber to matrix,the tensile strength,blending strength and breaking elongation of composites were increased along with the increasing of fiber content,but decreased gradually for water absorption rate.Glass fiber in an amount of 4% was reached the threshold.The storage modulus of composites was increased with the increasing of glass fiber content,but melt index and complex viscosity were decreased.