polyolefin elastomer (poe), in the form of white granules, is a high-performance polyolefin that exhibits rubber elasticity at room temperature and has the characteristics of low density and large bending. , high low temperature impact resistance, easy processing, reusable and other characteristics.
the excellent performance and structural characteristics of poe:
the microscopic two-phase structure is the reason why poe has both high elasticity and thermoplasticity. in poe, the soft chain curl structure generated by the α-olefin branch can form an amorphous region with rubber elasticity (rubber phase), while the crystalline region of the polyethylene segment (plastic phase) serves as a physical cross-linking point role. the cross-linked state of this crystalline region is thermally reversible. at room temperature or low temperature, the crystalline region is preserved and exhibits macroscopic elasticity similar to rubber; at high temperature, the crystalline region is melted and destroyed, and macroscopically the elastomer changes from it is converted into a molten fluid, making it easy to be extruded and processed. compared with rubber, poe elastomer does not need to be vulcanized to obtain elasticity, and this cross-linked structure is reversible.
specifically, the excellent performance of poe is closely related to its structural characteristics:
the soft chain curl structure of α-olefin and the crystallized ethylene segment serve as physical cross-linking points. it has both excellent toughness and good processability;
it has good compatibility with polyolefins and has better fluidity;
there are no unsaturated double bonds in the poe molecule , weather resistance is better than other elastomers;
strong shear sensitivity and melt strength can achieve high extrusion and increase output;
good fluidity can improve filler dispersion the effect can improve the welding strength of products.
