| Number: | 421/35/97 |
|---|---|
| Start: | 01 January 1997 |
| End: | 31 December 2001 |
Processability of polycarbonates, especially in blow molding process is not well known. In this project, processability of blow molding, extrusion, and injection molding of five commercial polycarbonates including three branched polycarbonates will be investigated. Main objective is to clarify relationships among molecular structure, rheological properties, processability, and mechanical properties of molded samples. As molecular structure, molecular weight, molecular weight distribution, chemical analysis of branching agents, and degree of branching will be studied. As rheological properties, the followings will be studied; dynamic viscoelasticity in melt and solid states, stress relaxation in shear and in biaxial extension, uniaxial and biaxial extensional viscosity, non- Newtonian viscosity, normal stress difference, swell ratio, and melt tension. This is a very big and comprehensive project. It includes very fundamental as well as applied studies. All results will contribute extremely to our understanding and application on structure and properties of commercial polymers.
Two papers for PAC are in preparation:
- "Characterisation and Rheological Properties of Three Polycarbonates with Side-Chain Branching", by M. Takahashi, K. Sato, P. Tas, J. He, M. Lecomte and T. Masuda
- "Characterisation, Rheological Properties and Processability of Three Polycarbonates with Side-Chain Branching", by M. Takahashi, K. Sakai, K. Sato, J. He, P. Tas and T. Masuda