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Abstract
Organotin monomers containing dibutyltin groups – dibutyltin citraconate (DBTC) as a new monomer and dibutyltin maleate (DBTM) – were synthesized. Free radical copolymerizations of the organotin monomers with styrene (ST) and butyl acrylate (BA) were performed. The overall conversion was kept low (≤15% wt/wt) for all studied samples and the copolymers composition was determined from tin analysis using the Gillman and Rosenberg method. The reactivity ratios were calculated from the copolymer composition using the Fineman-Ross (FR) method. The synthesized monomers were characterized by elemental analysis, 1H-, 13C-NMR and FTIR spectroscopy.
Highlights
Copolymerization is one of the most important means to improve the performance of polymers.Copolymers are extensively used in industrial processes, because their physical properties, such as elasticity, permeability, glass transition temperature (Tg) and solvent diffusion kinetics can be varied within wide limits [1,2]
As r1 < 1 and r2 > 1, so the copolymer will contain blocks of butyl acrylate (BA) with low random units of dibutyltin citraconate (DBTC) due to the high reactivity of BA with its high reactivity ratio compared to DBTC [25]
The organotin monomers were copolymerized with styrene (ST) and butyl acrylate (BA) using a free radical technique
Summary
Copolymerization is one of the most important means to improve the performance of polymers. Molecules 2010, 15 composition, copolymer sequence distribution and molecular weight averages, is of particular importance in copolymerization processes This is because copolymer density and viscosity, which are two of the most important property measures used by polymer manufacturers, depend on these parameters [5]. The present article investigates the synthesis, and structural characterization of copolymers of dibutyltin citraconate (DBTC), and dibutyltin maleate (DBTM), with styrene (ST) and butyl acrylate (BA) as well as the reactivity ratios in the copolymerization. For this purpose, reactivity ratios for the classical copolymerization model were determined using the linearization methods of Finemann–Ross (FR method) [19]
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