CAJ | 학술논문

将质量比为70/30的PP/EVAC进行共混，用单螺杆挤出机经收敛形口模挤出，考察了共混物在挤出方向和不同口模位置处的相形态。结果表明，经过螺杆剪切作用后，分散相呈片层状与纤维状结构。该分散相在口模中流动受拉伸流场作用，片层状分散相演变成截面似“哑铃形”的片层状结构，其较薄部分持续变薄甚至破裂，形成尺寸较小的片层状结构；同时纤维状分散相被拉伸变长，直径减小。
장질량비위70/30적PP/EVAC진행공혼，용단라간제출궤경수렴형구모제출，고찰료공혼물재제출방향화불동구모위치처적상형태。결과표명，경과라간전절작용후，분산상정편층상여섬유상결구。해분산상재구모중류동수랍신류장작용，편층상분산상연변성절면사“아령형”적편층상결구，기교박부분지속변박심지파렬，형성척촌교소적편층상결구；동시섬유상분산상피랍신변장，직경감소。
Blends of PP and EVAC (mass ratio:70∶30) were prepared by single screw extrusion mixing. The blends sustained the stretching effect in convergent die.The morphology of dispersed phases were gained and researched.The results show that after sustained the shearing action,the dispersed phases are lamellar and fibrous structures.Under the elongation flow field,the lamellar structures are stretched to ones with the dumbbell-like sections vertical to extrusion direction. The thinner part of lamel is attenuated continuously until broken into smaller ones. Meanwhile the fibres are stretched and diameter decrease.