CAJ | 학술논문

选用聚乙烯基、聚丙烯基和聚丙烯/聚乙烯基3种木塑复合材料为研究对象，通过静态力学试验和 X射线衍射分析方法，研究模具温度对其力学性能及表面结晶度的影响。结果表明，在试验温度150～200℃范围内，模具温度对聚乙烯基木塑复合材料的力学性能影响最小，对聚丙烯基木塑复合材料的影响最显著；聚丙烯基木塑复合材料在模具温度为165℃时力学性能最优异，与155℃时相比冲击强度、弯曲强度和弹性模量分别提高了约12．3％、9．6％和15．1％；聚丙烯/聚乙烯基木塑复合材料在模具温度大于165℃时才可顺利稳定挤出，力学性能随模具温度的升高而降低。
선용취을희기、취병희기화취병희/취을희기3충목소복합재료위연구대상，통과정태역학시험화 X사선연사분석방법，연구모구온도대기역학성능급표면결정도적영향。결과표명，재시험온도150～200℃범위내，모구온도대취을희기목소복합재료적역학성능영향최소，대취병희기목소복합재료적영향최현저；취병희기목소복합재료재모구온도위165℃시역학성능최우이，여155℃시상비충격강도、만곡강도화탄성모량분별제고료약12．3％、9．6％화15．1％；취병희/취을희기목소복합재료재모구온도대우165℃시재가순리은정제출，역학성능수모구온도적승고이강저。
@@@@Wood flour/HDPE (WF/HDPE), wood flour /PP (WF/PP) and wood flour/PP/HDPE (WF/PP/HDPE) compos-ites were prepared, and the effects of the die temperatures on the mechanical properties and crystallinity of composites were investigated by static mechanical test and X-ray diffraction analysis.Within the die temperature of 150-200 ℃, the color of three composites becomes dark with the increasing of die temperature, and the die temperature hase little impact on the mechanical properties of WF/HDPE composite, while dramatic influence on WF/PP composite.WF/PP composite pres-ents optimal performance when the die temperature is 165 ℃.Compared with the temperature at 155 ℃, the impact strength, flexural strength and modulus of elasticity of WF/PP at 165 ℃ increase by 12.3%, 9.6% and 15.1%, respec-tively.When the die temperature is higher than 165 ℃, WF/PP/HDPE composite is with smooth surface, and its mechan-ical properties decrease with the increasing of die temperature.