Effect Of Plasma Graft On The Surface Properties Of UHMWPE Fiber

The ultra high molecule weight polyethylene (UHMWPE) fiber is chemically inactive with none function on its surface. It lacks active radical on its surface. And ultra high molecule weight polyethylene fiber is highly symmetrical structure of methylene, which makes the fiber Possesses high crystalline and degree of orientation. On one hand, this ensure that it has relatively high intension in terms of mechanics; on the other hand, it makes the external chemical inertness of the fiber very obvious, which is mainly represented by the low interface binding force after the fiber is made into composite material. So it is necessary to modify the ultra high module polyethylene fiber.At present there is many uses of plasma surface treatment on ultra high molecular weight polyethylene fiber, after uses high energy ion bombardment surface of fiber which electrification by air plasma , it causes the fiber surface to have the oxygen groups and so on . these groups are easy to activate, it cause chemical bond between the textile fiber and the resin produce . Thus increase Adhesion intensity In plasma treatment processes, because it only has the active groups merely in the fiber surface, the active groups quantity are few. Also the active groups are easy to decline in the air, therefore It obtains the widespread application with difficulty.Uses the surface grafting method, it may defer to the artificial design, in the fiber surface production graft polymer level, these graft polymers may defer to the design to contain the specific functional group, but as a result of high macromolecular weight polyethylene chemistry inertia, through in liquid solution surface grafting polymerization method with difficulty in superficial initiation surface grafting.This article mainly uses the plasma grafting polymerization surface treatment and the plasma initiation grafting polymerization surface treatment method in the ultra high molecular weight polyethylene fiber surface distinction grafting styrene and the methyl acrylic acid. The wetability and the adhesion intensity are enhanced after the above two methods modification. After the ordinary plasma processing, the fiber contract angle is 75.3o, The adhesion intensity is 1.69Mpa. But uses the plasma grafting polymerization surface treatment modified macromolecular weight polyethylene fiber the contract angle is to be possible to reduce to 24.60o, the single filament adhesion intensity may 2.14Mpa. The plasma initiation grafting polymerization surface treatment...