POLYMERIZATION OF STYRENE BY DIPHENYLZINC-ADDITIVE SYSTEMS. PART X. HOMO- AND COPOLYMERIZATION OF STYRENE USING Ph2Zn - METALLOCENE - MAO SYSTEMS

Combination of diphenylzinc, Ph2Zn, cyclopentadienyl titanium trichloride, CpTiCl3, and methylaluminoxane, MAO, were used to initiate styrene, S, polymerization and its copolymerization with 1-hexadecene, 1-C16H32, and with p-tert-butylstyrene, p-ButS. For homopolymerization an almost pure syndiotatic polystyrene, s-PS, was obtained when using Ph2Zn-CpTiCl3-MAO combination, while other combinations of these components produced atactic polystyrene, a-PS, or almost no polymer at all. CpTiCl3-MAO and Ph2Zn-CpTiCl3-MAO were effective initiator systems for S/1-C16H32 and for S/p-ButS copolymerization. S/1-C16H32 copolymers showed crystalline melting temperature at range 235 - 255 °C while S/p-ButS copolymers did not show any melting temperature signal at DSC, but behave as stereoregular polymer

Bibliographic Details

Main Authors:	RABAGLIATI,FRANCO M., PÉREZ,MÓNICA. A., CANCINO,RODRIGO A., SOTO,MARCELO A., RODRÍGUEZ,FRANCISCO J., LEÓN,ARTURO G., AYAL,HUGO A., QUIJADA,RAÚL
Format:	Digital revista
Language:	English
Published:	Sociedad Chilena de Química 2000
Online Access:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0366-16442000000200008
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