پديدآورندگان :
Nikzinat Ehsan Research and development department, Jam petrochemical company, Asaluyeh, Bushehr, Iran , Sepahi Abdolhannan Research and development department, Jam petrochemical company, Asaluyeh, Bushehr, Iran , Yagoobi Zahra Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, Tehran, Iran , Jandaghian Mohammad Hossein Research and development department, Jam petrochemical company, Asaluyeh, Bushehr, Iran , Hosseini Shahin Research and development department, Jam petrochemical company, Asaluyeh, Bushehr, Iran
كليدواژه :
Polymer Synthesis and Polymerization , UHMWPE , Ziegler , Natta Catalysts , Temperature Effect
چكيده فارسي :
In this paper, different Ultra High Molecular Weight Polyethylene (UHMWPE) were polymerized and investigated their microstructure, such as molecular weight, density, and thermal properties. The molecular weight is controlled by polymerization temperature because polymerization constants depend on temperature, and there are different activities and microstructures at various polymerization temperatures. The transfer reaction to polymer chains can cause long chain branching. Comonomers can reduce molecular weight and create short chain branching. Therefore, there is no short chain branching without a comonomer. In addition, there are transfer reactions to monomer and cocatalyst.
