Application and research progress of High strength and High modulus PVA fiber
PVA is has the potential to produce one of super-high strength fiber flexible polymer chain, and according to the main chain of the PVA macromolecule bond energy theory, compared to the calculated value of a commodity PVA fiber highest intensity was only about 10% of the theoretical strength, high modulus of 30% of the theoretical limit value . Therefore, looking for methods to develop High strength & high modulus PVA fiber is feasible.
Fiber fracture microscopic mechanism, generally have a slip of molecular chain and two kinds of molecular chain fracture, its have in common is to assume that the molecular chain in fiber is arranged along the fiber axis parallel orientation, uniform distribution of stress in the fiber cross section. So, the strength of the fiber mainly depends on the fiber cross section on macromolecular chain number, the uniformity of chemical bonds can and chain extension. So High molecular weight, molecular chain highly extended orientation and crystallization in full, for producing High strength & high modulus PVA fiber's theory of three basic conditions.
High strength & high modulus PVA fiber can also be applied on the fiber glass replacement. Glass fiber has high strength and modulus, so the construction of lightweight materials generally USES glass fiber as reinforcing material, but because of its alkali resistance is not ideal, so bending strength along with the extending of time will be reduced. In addition, can stimulate the staff in the construction of the skin and environmental protection. High strength & high modulus PVA fiber has unique properties, can be a glass fiber in the building materials of the application of a better alternative materials.
High strength & high modulus PVA fiber reinforced material can also be used for rubber and tyre cord, still can use its High tensile and corrosion resistance and other properties, used in the production of fishing nets, rope, canvas, conveyor belt, etc.