The main factors which effect the strength of PP high tenacity yarn are the melt flow index of polymer, draw ratio and spinning speed, in which the draw ratio plays the most important role. 探讨了影响丙纶高强丝强度的主要因素,如原料的熔融指数、拉伸倍数及拉伸速度,其中,拉伸倍数对丙纶高强丝的强度贡献最大。
Rapid chiral separations were achieved on it by combining high flow rate with gradient elution. A cinchonine imprinted monolithic polymer was directly prepared in a fused capillary column by in-situ polymerization. 借助于提高流速和使用梯度洗脱在其上实现了快速手性分离。采用原位聚合法直接在毛细管柱中合成出具有大孔结构的整体毛细管分子印迹柱。