The Relationship Between Molecular Structure, Morphology, and the Mechanical Properties of Polymeric Materials
Abstract
The report briefly summarizes the main results of research accomplished in the following categories: synthesis of model polymers, crystalline polymers, rheological studies and chain conformation of polymeric chains. The first category includes the synthesis of linear polystyrenes and poly-(methylstyrene) with narrow distribution of molecular weights, of well-characterized branched and comb polystyrenes. The section on crystalline polymers includes morphological studies by optical microscopy and light scattering, crystallization kinetics, crystallographic investigations and viscoelastic studies. Under rheological studies are included: a representation for the zero shear viscosity of a wide group of polymers as a function of molecular weight, temperature, and concentration; a corresponding states relation for the temperature dependence of the viscosity of a wide class of materials; the viscoelastic behavior of polystyrene; an analysis of the free vibration method in linear viscoelasticity; viscoelastic, crystal growth rate, and calorimetric studies on 1:3:5 tri-alpha-naphthyl benzene. The final section deals with the theoretical calculation of chain dimensions on the basis of a more realistic model. An appendix lists papers already published or in press.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 31, 1967
- Accession Number
- AD0666123
Entities
People
- Hershel Markovitz
Organizations
- Carnegie Mellon University