Monte Carlo simulation of phase separation of A/B/A-B ternary mixtures

Monte Carlo simulations were used to model A/B/A-B ternary mixtures with different AB diblock copolymer volume fractions for which both the dispersed and continuous phase volume fractions were kept constant. For concentrations of the diblock copolymer below a critical value, the domain size increment of the dispersed phase decreases linearly with the copolymer concentration. This is in agreement with the predictions of Noolandi and Hong. The dependence of the domain size as a function of the copolymer volume fraction can also be fitted by the equation of Tang and Huang. Our simulations indicate, for the first time, that the micelles form before saturation of the interface occurs. This means that the formation of the micelles is not a result of the saturation of the interface.

用自动元素分析仪测定含氟化合物中的碳、氢

本文介绍用兰州化物所制备的Ag_2WO_4,MgO/AgVO_3催化剂分析含氟量很高的高分子化合物中的碳、氢的方法。该法的优点是快速、简便、燃烧温度低。测定的绝对误差不大于0.3%。 2 仪器和试剂: Carlo Erba 1106型元素分析仪,精度为lμg的天平,锡箔压制的样品小舟。Ag_2WO_4,MgO/AgVO_3兰州化物所制,镀银还原铜自制。氧气、氦气的纯度为99.999％。