Paper Number
PO49 

Session
Poster Session

Title
Modeling flow effects on polymer crystallization

Presentation Date and Time
October 23, 2019 (Wednesday) 6:30

Track / Room
Poster Session / Ballroom C on 4th floor

Authors (Click on name to view author profile)

  1. Seo, Jiho (Penn State University, Materials Science and Engineering)
  2. Gohn, Anne (Penn State Behrend, School of Engineering)
  3. Rhoades, Alicyn (Penn State Behrend, School of Engineering)
  4. Schaake, Richard (SKF, Engineering and Research Centre)
  5. Colby, Ralph (Pennsylvania State University, Materials Science and Engineering)

Author and Affiliation Lines (in printed abstract book)
Jiho Seo1, Anne Gohn2, Alicyn Rhoades2, Richard Schaake3, and Ralph Colby1
1Materials Science and Engineering, Pennsylvania State University, University Park, PA 16802; 2School of Engineering, Penn State Behrend, Erie, PA 16563; 3Engineering and Research Centre, SKF, Nieuwegein, The Netherlands

Speaker / Presenter 
Seo, Jiho

Text of Abstract
When a semicrystalline polymer melt is subjected to intense shear flow before crystallization, the crystallization rate is accelerated, referred to as flow-induced crystallization (FIC). In this study, the FIC behaviors are investigated with commercial poly(ether ether ketone) under well-defined shearing conditions using a rotational rheometer. With the FIC kinetics, a flow-induced nucleation model is suggested based on Flory’s entropy reduction model and the isothermal nucleation model of Hoffman and Lauritzen. The flow-induced nucleation model agrees relatively well with the rheological data demonstrating good trends for the influence of specific work. These results imply that only ~1% of mechanical energy is contributed to reducing the entropy-relevant free energy due to the dominance of friction and relaxation effects. Aside from the specific work, this model introduces the idea of a critical nucleation volume that is similar in size to the volume of a Kuhn monomer.