摘要
用高压毛细管流变仪研究了HDPE、EVA、ABS、PP/TMB、HDPE/EPDM柔性链聚合物及其共混物熔体较宽.γ范围内ηa与T的关系,并对表征ηa与T关系的两种方法的差异进行了分析,结果表明,方程ηa=A+KηT能简便、直观、真实的表征ηa与T的关系,方程lnηa=lnA+△Eη/RT不仅不能直观地表征ηa与T的关系,而且"压缩"了.γ、T的变化引起ηa变化的程度,使.γ、T与ηa的关系失去了真实性。
The relation between apparent viscosity（η_a） and T of the melts of some flexible polymers and polymer blends,which are respectively HDPE,EVA,ABS,PP/TMB,HDPE/EPDM,was characterized using a capillary rheometer,and the difference in two characterization approaches about the relation between η_a and T was investigated under the wide range shear rate（）.The results showed that the relation between η_a and T could simply,intuitively and actually be characterized with the equation of η_a=A＋K_ηT.However,the equation of lnη_a=lnA＋△E_η/RT not only can＇t express the relation between η_a and T intuitively,and also ＂compress＂ the variational extent of η_a with the change of or T.which lose authenticity between T or and η_a.
出处
《高分子通报》
CAS
CSCD
北大核心
2010年第4期94-99,共6页
Polymer Bulletin
基金
国家自然科学基金(50903076)
中国博士后基金(20080440826)
