摘要
利用旋转粘度计研究了四元丙烯酸酯共聚物无皂水溶胶、ＨＤＩ齐聚物及两者交联体系的流变行为，测定了三者的剪切应力（τ）～剪切速率（Ｄ）、表观粘度（ηａ）～剪切速率（Ｄ）及ｌｇτ～ｌｇＤ之间的关系。结果表明，水溶胶、ＨＤＩ齐聚物的流动指数ｎ近似于１，属牛顿型流体，而水溶胶＼ＨＤＩ齐聚物交联体系的ｎ＜１，属非牛顿型流体，并且具有触变性。
The rheological properties of acrylic water solubilized colloidal dispersion, HDI oligomer and their crosslinking system were tested by the rotating viscometer. The relationships between shearing stress( τ ) and shearing rate( D ), apparant viscosity( η a) and shearing rate( D ), lg τ and lg D were studied. The values of n and K were calculated by the equation of Ostwald Dewaele. It was found that n was nearly equal to 1 for water solubilized colloidal dispersion and HDI oligomer, showing Newtonian fluid, while n was less than 0.9 for their crosslinking systems showing non Newtonian fluid. The crosslinking systems appeared the thixotropy as well.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1997年第3期84-88,共5页
Polymer Materials Science & Engineering
基金
高等学校博士学科点科研基金
广东省自然科学基金
关键词
丙烯酸酯
水溶胶
齐聚物
流变性
涂料
固化
acrylic water solubilized colloidal dispersion, HDI oligomer, room temperature curing, rheological properties
