氢键与高强高模聚乙烯醇纤维

Hydrogen Bonds and High Tenacity and High Modulus of Poly (vinyl Alcohol)

讨论溶剂和立体规整性对氢键形成的影响,阐述冻胶纺丝过程中纺丝液浓度与温度、凝固浴温度等与氢键之间的关系。

The effects of solvents and PVA chain stereostructure on inter - and intramolecular hydrogen bonds were discussed. The semidilute solution concentration, solution temperature, coagulation components, coaguktion temperature, conformation and crystallinity were considered to affect the formation of hydrogen bonds and therefore the physical and mechanical properties of resulted fibers in the gel spinning process of PVA. Hydrogen bonds of gel spinning of partially saponificated PVA and of direct alcoholysis spinning of poly (vinyl acetate) were briefly analysed. They could bring about most troublesome problems in the preparation of high tenacity and high modulus PVA fibers..........................................................................................................