??Rubber material structure and composition

??Rubber three materials structure

??Linear structure: more common in a structured, no vulcanized rubber, the molecular weight is relatively large, in the absence of external force, was fine lumps. When the external force is applied when the degree of entanglement fine group of changes, changes in the molecular chains, resulting in a strong recovery tendencies.

??Crosslinked structure: linear molecules through a number of bridging atom or group of atoms connected to each other to form a three-dimensional network structure. As the vulcanization course of conduct, this structure is continuously strengthened. Thus, the free mobility segment decreased plasticity and elongation decreased, strength, elasticity and hardness rise, compression set and swelling decreased.

??Branched structure: rubber gel is gathering a branched macromolecular chains together, and it is for the rubber properties and processing will have some adverse effects, such as in mixing time, various compounding agents into the condensate gum area, will appear partial blank to form reinforcing and crosslinking can not become a vulnerable finished.