合成技术及应用
閤成技術及應用
합성기술급응용
SYNTHETIC TECHNOLOGY AND APPLICATION
2013年
3期
11-14
,共4页
许华君%郭志洪%陈月君%王依民%王燕萍
許華君%郭誌洪%陳月君%王依民%王燕萍
허화군%곽지홍%진월군%왕의민%왕연평
可熔性聚四氟乙烯%PFA%流变行为
可鎔性聚四氟乙烯%PFA%流變行為
가용성취사불을희%PFA%류변행위
meltable PTFE%PFA%rheological behavior
采用毛细管流变仪，对PFA熔体的流变性能进行研究。讨论了温度、剪切速率对纺丝用 PFA熔体的非牛顿指数、表观粘度、结构粘度指数等方面的影响。结果表明，PFA熔体非牛顿指数随温度上升而升高。在不同温度下，PFA熔体的粘度均随着剪切速率的增大而减小，表观粘流活化能随剪切速率增加而减小。 PFA熔体的结构粘度指数Δη随熔体温度的增高而逐渐减小。
採用毛細管流變儀，對PFA鎔體的流變性能進行研究。討論瞭溫度、剪切速率對紡絲用 PFA鎔體的非牛頓指數、錶觀粘度、結構粘度指數等方麵的影響。結果錶明，PFA鎔體非牛頓指數隨溫度上升而升高。在不同溫度下，PFA鎔體的粘度均隨著剪切速率的增大而減小，錶觀粘流活化能隨剪切速率增加而減小。 PFA鎔體的結構粘度指數Δη隨鎔體溫度的增高而逐漸減小。
채용모세관류변의，대PFA용체적류변성능진행연구。토론료온도、전절속솔대방사용 PFA용체적비우돈지수、표관점도、결구점도지수등방면적영향。결과표명，PFA용체비우돈지수수온도상승이승고。재불동온도하，PFA용체적점도균수착전절속솔적증대이감소，표관점류활화능수전절속솔증가이감소。 PFA용체적결구점도지수Δη수용체온도적증고이축점감소。
Rheological behavior of PFA melt was studied by capillary viscosimeter .Effect of shear rate and temperature on non-Newtonian index apparent viscosity and structural viscosity index of PFA were discussed .The results showed that the of PFA melt increased with increasing temperature .Melt viscosity of PFA decreased as the shear rate increased at gradually changed temperature range .And with increase of shear rate , the apparent viscous flow activation energy of PFA was gradually decreased .The structural viscosity index (Δη) of PFA melt decreased with the increase of PFA melt temperature .
