论文部分内容阅读
本文研究了端羟基液体聚丁二烯(丁羟)的流变性质,它是剪切速率、温度和分子量的函数。测量是在HAAKE RV2锥板式粘度计上进行的,温度15—70℃,剪切速度0—2,275s~(-1)。 当丁羟本体粘度小于1Pa·s,剪切速率低于650s~(-1)时,其流动行为基本为牛顿型,在其它条件下则为非牛顿型。当丁羟分子量在1,000—5,600范围内,其本体粘度与温度关系符合经验公式:logη_a=A+B/T。我们也确立了本体粘度与数均分子量的关系,在20℃时η_a=2.09×10~(-8)Mn~(2·52),在25℃时为η_a=1.14×10~(-8)Mn~(2·55)。
In this paper, the rheological properties of hydroxyl-terminated polybutadiene (butylated hydroxyanisole) were studied as a function of shear rate, temperature and molecular weight. The measurements were taken on a HAAKE RV2 cone and plate viscometer at a temperature of 15-70 ° C and a shear rate of 0-2,275 s -1. When the viscosity of butylated hydroxy group is less than 1 Pa · s and the shear rate is lower than 650 s -1, the flow behavior is basically Newtonian and non-Newtonian under other conditions. When the molecular weight of butylated hydroxylamine is in the range of 1,000-5,600, its bulk viscosity and temperature are in accordance with empirical formula: logη_a = A + B / T. We also established the relationship between the bulk viscosity and number average molecular weight, η_a = 2.09 × 10 -8 Mn ~ (2 · 52) at 20 ℃ and η_a = 1.14 × 10 ~ (-8) at 25 ℃. Mn ~ (2.55).