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聚氯乙烯/聚丙撑碳酸酯共混体系研究 总被引:4,自引:0,他引:4
Abstract: Poly(vinyl chloride)/poly(propylene carbonate)blends are prepared by methods of solution and melting,and are proved immiscible by DSC,but their immiscibility degrees are affected by molccular weight and blending ratio.PVC content in PPC-rich phase in solution blends is calculated according to glass transition temperature(Tg).As coupling agent, NBR-PPC elastomer has a great compatibility effect on PVC/PPC blends.The amount and molecular weight of PPC influence the mechanical properties of PVC/PPC blends. 相似文献
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本文以碱式碳酸铜、碱式碳酸锌和浓氨水为原料,采用蒸氨法合成绿铜锌矿.通过XRD、TGA、SEM-Mapping、FT-IR等表征手段,研究工艺条件对绿铜锌矿晶体结构的影响规律.实验表明,铜浓度为120 g/L,铜锌摩尔比分别为3∶2、1∶1、2∶3时,沉淀产物中的晶体由绿铜锌矿与孔雀石组成,且孔雀石数量随铜锌摩尔比的降低而减少.当铜锌摩尔比为2∶3,铜浓度由120 g/L降低至80 g/L时,孔雀石晶体的数量进一步减少.在铜锌摩尔比为2∶3,铜浓度为80 g/L的条件下,沉淀得到单一物相的绿铜锌矿晶体,为蒸氨法控制合成绿铜锌矿提供了数据支撑. 相似文献