Strain and strain-rate formulation for flow-induced crystallization.: An article from: Polymer Engineering and Science

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From the author: It has been suggested that isothermal flow-induced crystallization is jointly linked to strain and strain rate. Here we test this idea further by studying some results of Bove and Nobile on isotactic poly (1-butene). We also present some new experimental results on polypropylene in finite amplitude sinusoidal oscillation. The ranges of strain amplitude and frequency are from 0.1% to 10% and from 0.1 to 30 Hz, respectively. The experimental data are compared with the results calculated by using a multimode PTT model with a suspension-based theory; both strain and strain rate are involved in the flow-induced crystallization. A fairly good agreement between experiments and calculations has been observed. We conclude that a simple strain plus strain-rate function gives a reasonable description of flow-induced crystallization at low shear rates. POLYM. ENG. SCI., 46: 659-669, 2006. [c] 2006 Society of Plastics Engineers

Citation Details
Title: Strain and strain-rate formulation for flow-induced crystallization.
Author: Shao-Cong Dai
Publication:Polymer Engineering and Science (Magazine/Journal)
Date: May 1, 2006
Publisher: Thomson Gale
Volume: 46 Issue: 5 Page: 659(11)

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