Paper Number
SG2 

Session
Solids and Glasses

Title
Yielding, failure and strain hardening in uniaxial compression of polymer glasses

Presentation Date and Time
October 8, 2014 (Wednesday) 1:55

Track / Room
Track 5 / Washington B

Authors (Click on name to view author profile)

1. Lin, Panpan (University of Akron, Polymer Science)
2. Liu, Jianning (University of Akron)
3. Wang, Shi-Qing (University of Akron)

Author and Affiliation Lines (in printed abstract book)
Panpan Lin¹, Jianning Liu², and Shi-Qing Wang^2
1Polymer Science, University of Akron, Akron, OH 44325; ²University of Akron, Akron, OH 44325

Speaker / Presenter 
Lin, Panpan

Text of Abstract
We investigate the mechanical behavior of such common polymer glasses as bisphenol A polycarbonate and polystyrene as well as their mixtures. The in situ thermal measurements have allowed us to delineate the nature of the stress in the strain hardening in the post-yield regime. At low temperatures, compression produces fracture at high compression ratios although the uniaxial compression is completely homogeneous at high temperatures. We will analyze our observations in the context of our recent molecular model [1] for yielding and failure of polymer glasses in large deformation. [1] "A phenomenological molecular model for brittle-ductile transition and yielding of polymer glasses", S. Q. Wang, S. W. Cheng, P. P. Lin and X. X. Li, J. Chem. Phys., to be published (2014).