The high pressure solubility of polyethylene standards (M,=2100, 16400, 108000 and 420000 and Mw/M, = 1.14, 1.16, 1.32 and 2.66, respectively) in n-pentane has been studied. Concentrations of up to 15 wt% polymer have been investigated. For each polymer sample and concentration, pressures that are required to achieve single-phase solutions have been determined over a range of temperatures. The solutions are found to all show lower critical solution temperatures. Demixing pressures are observed to depend strongly on the molecular weight of the polymer.
Посилання на статтю:
Solubility of polyethylene in n-pentane at high pressures / Erdogan Kiran* and Wenhao Zhuang // Polymer. – 1992. – Vol 33. – P. 5259-5263.