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What is Understanding Polymer Melt Behavior about?

1. When polymers are subjected to shear forces during processing, their long molecular chains become distorted and oriented in the direction of flow. After shear is removed, the molecules will recoil back to their original coiled state if still molten. 2. The processes of coiling and recoiling under rapid cooling leads to elastic effects like die swell, sharkskin, melt fracture, and frozen-in orientation. Die swell occurs when the extrudate expands after exiting the die. Melt fracture appears at high shea

Author

Carlos Cardenas

Language

EN