Factors or methods to increase strength:
1. Chemical structure: Factors that increase the rigidity of the chain generally increase the strength of the polymer, such as the introduction of an aromatic heterocycle. Proper cross-linking can also increase the hardness of the material, and the length of the cross-linking chain also affects the hardness of the material.
2. Polymer form: Increasing the crystallinity and orientation can increase the strength of the material, but the crystallinity is too high, and the impact strength and elongation at break are reduced, that is, the material becomes brittle.
3. Copolymerization enhancement: copolymerization with "hard" monomers can increase the hardness of the material.
3. Blending enhancement: blending or compounding with reinforcing materials can improve material strength.
Factors that are not conducive to increasing the strength of the material:
1. Material stress concentration: This is a problem often encountered in the material preparation process.
2. Silver streaks appear in the material: it is also a common phenomenon.
3. Material Molding: Contrary to blending reinforcement, the material strength decreases when the material is blended with the plasticizer.
4. Filler reduces strength: For example, some inert fillers are blended with the material to “dilute†the matrix material to reduce the strength of the material. For example, filling some materials with calcium carbonate powder will result in a decrease in material strength.
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