Polyolefin-grafted GMA

Four major chemical modifications (copolymerization、block、graft、and interpenetrating network) and four physical modifications (blending, filling, strengthening and micro-foaming) of existing polymer materials to make them high-performance is an important research topic in contemporary materials science and engineering. By introducing block copolymers or graft copolymers into the blending system, a series of blends with excellent performance have been successfully prepared. Branch copolymerization has unparalleled advantages in achieving reactive extrusion capacity expansion. First, the functional groups of the graft copolymer can react with another polymer to achieve compatibilization (or called in-situ compatibilization); second, the screw can generate high shear force to reduce the viscosity of the system, and the copolymer can be fully mixed In particular, it avoids too much aggregation of the toughening agent and reduces the compatibilizing effect. The third is that the blending effect and the granulation or molding of the product can be achieved simultaneously in a continuous process, and the economic benefits are significant.

Glycidyl methacrylate (GMA) is a reactive bifunctional monomer containing carbon-carbon double bonds and epoxy groups in the molecule. It is a colorless and transparent liquid that is insoluble in water and easily soluble in organic solvents. The mucous membrane is irritating and almost non-toxic. GMA contains bifunctional groups and can perform both free-radical and ionic reactions. Therefore, it has high reactivity and can be widely used in the synthesis and modification of polymer materials. Polyethylene (PE), polypropylene (PP), polyethylene-octene (POE) and other polyolefins are modified by GMA grafting, which can significantly improve the adhesion and hydrophilicity of polymers and their polar polymers.

GMA-modified polyolefincan be used to modify plastics to obtain more excellent products. The epoxy group contained in the GMA molecule can react with the terminal groups of some resins (such as carboxyl, hydroxyl and amino), so the GMA graft copolymer can be used as a compatibilizer modified plastic or made of other plastics. Blend gold. The epoxy group contained in the GMA molecule can react with the functional groups at the molecular chain end of some engineering plastics and form chemical bonds to combine with each other, reducing the interfacial tension of the two phases, so that the dispersed phase has a finer distribution in the alloy. Significant improvement in compatibility