Radical‐initiated copolymers of styrene and p‐formylstyrene, 1. Solution copolymerization and characterization

Abstract

Kinetics of solution homopolymerization of p-formylstyrene a) (A) and copolymerization with styrene (S) have been examined at 60 "C in N,N-dimethylformamide with 2,2'-azoisobutyronitrile as initiator. For p-formylstyrene, k,/k:/' = 0,135 L 1 " . mol-"'. s-"' was estimated from the plot of monomer consumption versus time, i. e. a value greater than that for styrene (kp and k, are the rate constants of propagation and termination, respectively). Reactivity ratios have been determined to be rA = 3,O and r, = 0,2, indicating the reactivity ofp-formylstyrene to be higher than that of styrene. Moreover, from initial copolymerization rates, the cross termination factor was calculated and found to depend upon the copolymer composition. Some solution properties of the homo-and copolymers have been analysed: solubility of (co)polymers, their molecular weight and its distribution (by gel permeation chromatography), and their composition and monomer sequence distribution (using 'H and I3C NMR spectroscopy).

Synthesis and Characterization of Polymeric Derivatives Containing Grafted Triorganotin Cinnamates with Electrochemical Chloride Response

“…[18] 73-79 8C/ 3 mm Hg) to give 3.2 g (30% yield) of VBA. 1 Homo-and Copolymerization of VBA with Styrene [19] As a general procedure, 1.0 g of monomer(s) (VBA or VBA/ Styrene in the 75 : 25 molar ratio), dissolved in dry DMF (10 mL) was introduced in a glass vial and AIBN (2 wt.-% with respect to the monomer) added. The vial was purged with nitrogen and submitted to several freeze-thaw cycles in order to eliminate the dissolved air, tightly closed under vacuum and heated at 60 8C for 4 d. The resulting polymer was precipitated with methanol, dissolved in chloroform, and precipitated again with methanol.…”

Synthesis of carboxylic acid functionalized nanoparticles by reversible addition–fragmentation chain transfer (RAFT) miniemulsion polymerization of styrene

“…In order to prepare such functional particles, several methods are adopted such as the (1) co-polymerization with ionic monomers/comonomers [8][9][10], (2) polymerization with charge endowing surfactants or initiators [11][12][13] and (3) multi-step process in which functional groups are incorporated into the polymer particles [14,15]. Such polymer particles are produced by the introduction of highly polar or ionic functional groups including aldehyde [16,17], carboxylate [18,19], chloromethyl [20,21], amino [22,23], and vinyl moiety [24].…”

Chemical Modifications on Polystyrene Latex: Preparation and Characterization for Use in Immunological Applications

“…Numerous functional groups have been explored and utilized for covalent binding of various polymers particularly with proteins. These functional polymers can be used to immobilize biological molecules such as proteins, antibodies and enzymes [3][4][5].…”