شماره ركورد كنفرانس :
5536
عنوان مقاله :
Effect of Polymerization Techniques and Reaction Temperature on Glass Transition Temperature (Tg) of Poly(methyl methacrylate) (PMMA)
پديدآورندگان :
Ramezanpour Maede Department of Polymer and Materials, Faculty of Chemistry Petroleum Sciences, Shahid Beheshti University, Evin, Tehran, Iran , Rezaee Shirin-Abadi Abbas Department of Polymer and Materials, Faculty of Chemistry Petroleum Sciences, Shahid Beheshti University, Evin, Tehran, Iran
كليدواژه :
Emulsion polymerization , Bulk polymerization , solution polymerization , Reaction temperature , Tacticity , Glass transition temperature
عنوان كنفرانس :
پانزدهمين همايش بين المللي علوم و فناوري پليمر
چكيده فارسي :
We report the preparation of poly(methyl methacrylate)s (PMMA)s via different polymerization techniques such as bulk, solution, and two types of emulsion polymerization processes such as batch (by two initiator systems) and semi-batch at 65 °C and 85 °C. These parameters impact on tacticity (isotactic, syndiotactic, and atactic) of PMMA. Different tacticity leads to a different glass transition temperature (Tg) as an essential property of polymers. FTIR, 1H NMR, and 13C NMR were employed to investigate the tacticity of the samples. Glass transition temperature of polymers was determined by Dynamic Mechanical Thermal Analysis (DMTA) and ranged from about 70 °C to 140 °C.
