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.
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