A study on the polymeric structure of the soybean protein/polyvivyl alcohol crossblend fiber

摘要

As a new type of protein modified synthetic fiber, the soybean protein/polyvinyl alcohol crossblend fiber with a 20/80 component of protein and PVA has been named as PVA-SPF. The macromolecular chain of PVA stacks in the form of plane sawtooth, and the soybean protein macromolecular chain have been modified from α- helical structure to β- chain conformation in process of spinning preparation. Because there are a number of polar groups on the chains of both PVA and the soybean protein, it is possible that diversiform bonds can be formed among the macromolecular chains. Moreover, the acetalizagion of the PVA-SPF may form crosslinking structures between the polyethylene and the soybean protein, so the polymeric structure of the PVA-SPF is mainly a chain reticular structure. X-ray diffraction analysis shows that the crystalline ability of the PVA-SPF macromolecular is weak, while the ability forming the nematic structure is powerful.