工程塑料应用
工程塑料應用
공정소료응용
ENGINEERING PLASTICS APPLICATION
2014年
5期
47-50
,共4页
三元乙丙橡胶%聚丙烯%热塑性弹性体%动态硫化%流变特性
三元乙丙橡膠%聚丙烯%熱塑性彈性體%動態硫化%流變特性
삼원을병상효%취병희%열소성탄성체%동태류화%류변특성
ethylene propylene diene terpolymer%polypropylene%thermoplastic vulcanizate%dynamic vulcanization%rheology property
以聚丙烯(PP)和三元乙丙橡胶(EPDM)等为原料，采用完全动态硫化共混技术制备EPDM／PP热塑性弹性体(TPV)，使用毛细管流变仪对TPV熔体的流变特性进行测试。分别研究了剪切速率、挤出温度对黏度、剪切应力和挤出胀大比的影响，以及不同条件下熔体流过毛细管口模时流速对压力降的影响。结果表明，TPV熔体是假塑性流体，其剪切应力随剪切速率增大而增大，随挤出温度的升高而降低；黏度随剪切速率和挤出温度的增大而降低；挤出胀大比则随剪切速率和挤出温度的增大而增大；毛细管口模的压力降也随流速和毛细管口模长度的增大而增大。
以聚丙烯(PP)和三元乙丙橡膠(EPDM)等為原料，採用完全動態硫化共混技術製備EPDM／PP熱塑性彈性體(TPV)，使用毛細管流變儀對TPV鎔體的流變特性進行測試。分彆研究瞭剪切速率、擠齣溫度對黏度、剪切應力和擠齣脹大比的影響，以及不同條件下鎔體流過毛細管口模時流速對壓力降的影響。結果錶明，TPV鎔體是假塑性流體，其剪切應力隨剪切速率增大而增大，隨擠齣溫度的升高而降低；黏度隨剪切速率和擠齣溫度的增大而降低；擠齣脹大比則隨剪切速率和擠齣溫度的增大而增大；毛細管口模的壓力降也隨流速和毛細管口模長度的增大而增大。
이취병희(PP)화삼원을병상효(EPDM)등위원료，채용완전동태류화공혼기술제비EPDM／PP열소성탄성체(TPV)，사용모세관류변의대TPV용체적류변특성진행측시。분별연구료전절속솔、제출온도대점도、전절응력화제출창대비적영향，이급불동조건하용체류과모세관구모시류속대압력강적영향。결과표명，TPV용체시가소성류체，기전절응력수전절속솔증대이증대，수제출온도적승고이강저；점도수전절속솔화제출온도적증대이강저；제출창대비칙수전절속솔화제출온도적증대이증대；모세관구모적압력강야수류속화모세관구모장도적증대이증대。
Thermoplastic vulcanizate(TPV) was prepared using polypropylene(PP) and ethylene propylene diene terpolymer (EPDM) by means of dynamic vulcanization.The rheological behavior of TPV blend melts was measured using a capillary rheometer.The effects of extrusion temperature and shear rate on the rheological properties of the blend melts were studied,and the flow behavior in capillary extrusion was also investigated.The results showed that the shear stress of the blend melts increased with the increase of shear rate and decreased with the increase of extrusion temperature;the viscosity decreased with the increase of shear rate and extrusion temperature;the die swell rate increased with the increase of flow rate and extrusion temperature;the die pressure drop rose with increasing flow velocity and capillary length.
