Premium
Free radical copolymerization in the presence of lewis acids. II. Alternating copolymerization of styrene with butyl acrylate in the presence of SnCl 4
Author(s) -
Yuan Yumin,
Song Hong,
Xu Guojin
Publication year - 1993
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.4990310414
Subject(s) - copolymer , styrene , polymer chemistry , acrylate , toluene , butyl acrylate , solvent , methyl acrylate , chemistry , polymerization , reaction rate constant , materials science , kinetics , polymer , organic chemistry , physics , quantum mechanics
The mechanism of alternating copolymerization of butyl acrylate (BA) with styrene (St) in the presence of SnCl 4 , photo‐initiated by Mn 2 (CO) 10 ‐CCl 4 , has been investigated. The results show that the rate of copolymerization is proportional to [BA‐SnCl 4 ] [St] 0 , which is in agreement with the cross‐propagation mechanism. The apparent rate constant, which can be conveniently obtained by measuring the rate of polymerization as a function of [SnCl 4 ], is found to be 3.25 × 10 s −3−1 . Alternating copolymers are obtained over a wide range of reactant composition. The solvent effect shows that the reaction in tetrachloro‐ethylene (TCE) is more advantageous to alternation than is that in toluene (TOL). 13 C‐NMR spectrum confirms that the copolymers obtained have strict alternating structure.