广州化工
廣州化工
엄주화공
GUANGZHOU CHEMICAL INDUSTRY AND TECHNOLOGY
2015年
8期
96-98
,共3页
缔合聚合物%微嵌段%粘弹性%幂律指数%流变性
締閤聚閤物%微嵌段%粘彈性%冪律指數%流變性
체합취합물%미감단%점탄성%멱률지수%류변성
associative polymer%micro-block%viscoelastic property%power-law index%rheology
通过高级流变仪测试了不同微嵌段长度的缔合聚合物溶液的剪切稀释特性和线性粘弹性。测试结果表明，在临界缔合浓度之上，其幂律指数和松弛时间在NH＝30.8时出现极值，证实缔合聚合物的非牛顿特性和线性粘弹性并不是随嵌段长度增加而单调增加的，这与一般缔合聚合物的规律不一致；在临界缔合浓度以下，其非牛顿特性和线性粘弹性随着嵌段长度增加而逐步增加。因此嵌段长度通过影响缔合效应的强度进而影响缔合聚合物的粘弹性。
通過高級流變儀測試瞭不同微嵌段長度的締閤聚閤物溶液的剪切稀釋特性和線性粘彈性。測試結果錶明，在臨界締閤濃度之上，其冪律指數和鬆弛時間在NH＝30.8時齣現極值，證實締閤聚閤物的非牛頓特性和線性粘彈性併不是隨嵌段長度增加而單調增加的，這與一般締閤聚閤物的規律不一緻；在臨界締閤濃度以下，其非牛頓特性和線性粘彈性隨著嵌段長度增加而逐步增加。因此嵌段長度通過影響締閤效應的彊度進而影響締閤聚閤物的粘彈性。
통과고급류변의측시료불동미감단장도적체합취합물용액적전절희석특성화선성점탄성。측시결과표명，재림계체합농도지상，기멱률지수화송이시간재NH＝30.8시출현겁치，증실체합취합물적비우돈특성화선성점탄성병불시수감단장도증가이단조증가적，저여일반체합취합물적규률불일치；재림계체합농도이하，기비우돈특성화선성점탄성수착감단장도증가이축보증가。인차감단장도통과영향체합효응적강도진이영향체합취합물적점탄성。
Shearing-dilute properties and linear viscoelastic properties were measured with MCR-301 rheometer.The results showed that upper CAC, the Power-law index and relaxation time appeared extreme values at NH=30.8, it was proved that non-Newton properties and linear viscoelastic properties did not improve with length of micro-block increasing, all of these were not agree with common associative polymer.However, under CAC, both of these increased with length of micro-block increasing.Therefore, block length affected viscoelastic properties with change associative strength.
