In the processing of specialty polymer materials, while a high phenyl content endows products with exceptional heat resistance and dimensional stability, it often leads to "processing ailments"—such as high mixing energy consumption, abnormal extrusion die swell, and mold sticking during vulcanization—due to the excessive rigidity of molecular chains and high cohesive energy density. Phenyl raw rubber, leveraging its unique characteristics of "molecular chain flexibility modulation" and "interfacial release," acts as a "processing flow activator" for high-phenyl-content materials; without sacrificing bulk material properties, it streamlines the entire processing chain, from mixing to demolding.

The key to phenyl raw rubber's ability to resolve these processing challenges lies in its "end-group activity" and "phenyl gradient distribution." During the mixing stage, its low-molecular-weight linear structure acts as a "molecular lubricant," effectively penetrating the interstitial spaces between the molecular chains of the high-phenyl polymer. This reduces resistance to chain segment movement, facilitates more uniform filler dispersion, and lowers energy consumption by over 20%. During the extrusion and vulcanization phase, its distinctive phenyl end-groups undergo directional adsorption onto the mold surface, forming a "dynamic self-lubricating film." This transforms the "rigid contact" between the rubber compound and the metal mold into a "flexible slip," reducing the rate of mold sticking during vulcanization to below 0.3%.

Furthermore, the excellent "thermal responsiveness" of phenyl raw rubber allows it to maintain moderate fluidity within the vulcanization temperature range. This compensates for the "stress freezing"—a phenomenon caused by the rigid segments inherent in high-phenyl materials—thereby improving the surface finish of the final product to Ra ≤ 0.8 μm. Additionally, the active groups within its molecular chains work synergistically with the vulcanization system to achieve "gradient vulcanization": the surface layer crosslinks preferentially to form a dense release layer, while the inner layer continues to complete its network formation. This dual action ensures both smooth demolding and the attainment of required physical properties.

From molecular-level chain segment lubrication to macroscopic interfacial release, phenyl raw rubber resolves the processing bottlenecks associated with high-phenyl-content materials through a synergistic mechanism characterized by "internal lubrication, external slip, and gradient vulcanization." It serves not only as a "process modifier" for the processing of specialty rubber, but also as a crucial bridge for the industrial application of high-performance materials.