Journal of Materials Science and Engineering with Advanced TechnologyAuthor's: MARIA DE FÃTIMA V. MARQUES and RODRIGO BERNARDES TIOSSO
Pages: [149] - [173]
Received Date: September 9, 2011
Submitted by:
Ethylene/1-hexene copolymerization was carried out using 
catalyst supported on two different
carriers (silica and bentonite), and compared to homogeneous
copolymerization. The reactions were carried out at 50ºC and
80ºC employing different amounts of comonomer. The polymerization
parameters, such as catalyst activity and copolymer thermal properties
were examined. In reactions at 80ºC, the catalyst performed
significantly better with the addition of comonomer when silica was
used as support. However, the activity decreased when a
bentonite-supported catalyst was employed. In both heterogeneous
polymerizations, the amounts of comonomer incorporated in the
polyethylene chains were lower than those with the homogeneous
counterpart, although, the homogeneous polymer system presented higher
melting temperatures.
ethylene copolymer, supported catalyst, metallocene catalyst, silica, clay, nanocomposite.
