摘要
Abstract
To improve the compatibility between glass fiber(GF)and PP resin,glass fiber/expanded polypropylene(EPP)composites were prepared,and the pore characteristics,thermal properties,and mechanical properties of the composites were studied.The results showed that after foaming,pure polypropylene(PP)had highly irregular pore sizes,with most pores being elliptical and many pores collapsing.With the addition of GF,the pore structure of the composites initially showed optimization and then deteriorated.The average pore diameter first decreased and then increased.The thermal and mechanical properties of the composites first improved and then decreased.When 15%mass fraction of GF was added,the pore characteristics,thermal properties,and mechanical properties of the composites were at their best.At this point,the pore structure of the composites was intact,the pore density reached 1.25×107 pieces/cm3,and the thermal conductivity was 0.023 W/(m·K).Compared to the samples without GF,the temperature at which load deformation occurred increased by 32℃,and the tensile yield stress,tensile strength,bending modulus,and notched impact strength increased by 119.5%,88.9%,77.3%,and 60.0%,respectively.关键词
玻璃纤维/发泡聚丙烯/泡孔特性/热学性能/力学性能Key words
Glass fiber/Expanded polypropylene/Porosity characteristics/Thermal performance/Mechanical property
