The use of DMTA for predicting standard mechanical properties of developmental polyolefins
- 118 Downloads
The correlation of linear data from dynamic-mechanical testing (DMTA) to nonlinear data from standard mechanical testing was attempted for a number of quite different polypropylene-based compositions. For limited composition ranges, correlations between storage modulus and stiffness as well as between loss angle integrals and impact strength could be achieved. Challenges in trying to correlate DMTA tests to standard mechanics clearly result from morphology effects at different scales, both in crystallinity and flow-induced superstructures (orientation) and in multiphase impact copolymers or composites. While a relative scaling turned out to be easy, absolute prediction is difficult.
KeywordsDynamic-mechanical analysis Polypropylene Impact strength Nanocomposite Glass transition Aging
- 6.Gahleitner M, Fiebig J, Wolfschwenger J, Dreiling G, Paulik C. Post-crystallization and physical ageing of polypropylene: material and processing effects. J Macromol Sci Phys. 2002;B41:833–49.Google Scholar
- 10.Aarnio M. Structure property relationships of heterophasic ethylene-propylene copolymers. MSc Thesis, Helsinki Universito of Technology, December 2007.Google Scholar
- 14.Reichelt N, Pham T, Gahleitner M. EP 1589070 A1. Polymer composition with improved stiffness and impact strength. Borealis Technology Oy; 2000.Google Scholar
- 20.Gahleitner M, Grein C, Hauer A. Motha K. Application of dynamic-mechanical analysis for prediction of mechanical performance of polypropylene composites. Procceedings of PPS Europe-Africa conference 2003, Athens, Greece, Lecture 11-A1-O (CD-ROM).Google Scholar