𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Reactivity ratios and microstructure of vinyl acetate–butyl methacrylate copolymers: NMR study

✍ Scribed by A. S. Brar; Shiv Charan

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
373 KB
Volume
51
Category
Article
ISSN
0021-8995

No coin nor oath required. For personal study only.

✦ Synopsis

Vinyl acetate/butyl methacrylate ( V/B ) copolymers were prepared by free-radical solution polymerization in benzene. Compositions of the copolymers have been obtained from 'H-NMR spectroscopy. Kelen-Tudos (KT) , the nonlinear error in variables method (EVM) , and I3C { 'H 1 -NMR spectra of the copolymers were utilized to calculate the comonomer reactivity ratios. The reactivity from different methods are rv = 0.06 -+ 0.02, rB = 26.34 -+ 8.49 (KT); rv = 0.06 k 0.01, rB = 26.88 -+ 3.59 (EVM); and rv = 0.06, rB = 18.20 (I3C-NMR spectroscopy). The microstructure in terms of V-and B-centered triad fractions was obtained using I3C { 'H 1 -NMR spectra of copolymers. The copolymerization behavior of V/B copolymers as a function of conversion was also studied.

📜 SIMILAR VOLUMES

Reactivity ratios and thermal and dielec
Reactivity ratios and thermal and dielectric studies of n-butyl methacrylate and methacrylamide copolymers
✍ B. Srinivasulu; P. Raghunath Rao; E. V. Sundaram; G. Sathaiah; Lalitha Sirdeshmu 📂 Article 📅 1993 🏛 John Wiley and Sons 🌐 English ⚖ 380 KB 👁 2 views

Free-radical copolymerization of n-butyl methacrylate ( B ) and methacrylamide ( M ) was carried out in the presence of 2,2'-azobisisobutyronitrile ( AIBN ) in dimethyl formamide (DMF) at 60°C. The percentage composition of the copolymers was established by elemental analysis. The reactivity ratios

Reactivity ratios and monomer partitioni
Reactivity ratios and monomer partitioning in the microemulsion copolymerization of vinyl acetate and butyl acrylate
✍ Víctor M. Ovando-Medina; Hugo Martínez-Gutiérrez; Eduardo Mendizábal; Miguel A. 📂 Article 📅 2009 🏛 John Wiley and Sons 🌐 English ⚖ 149 KB 👁 2 views

## Abstract The true monomer reactivity ratios for the vinyl acetate/butyl acrylate system were determined with experimental data from the cumulative copolymer composition at low, intermediate, and high conversions and with the monomer partitioning among the aqueous, microemulsion droplet, and poly

Comonomer sequence determination of viny
Comonomer sequence determination of vinyl acetate–glycidyl methacrylate copolymers by NMR spectroscopy
✍ A. S. Brar; Shiv Charan 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 414 KB 👁 2 views

## SYNOPSIS (Vinyl acetate)/(glycidyl methacrylate) (V/G) copolymers were prepared by free radical solution polymerization in benzene. Copolymer composition was determined by 'H-NMR spectroscopy. Comonomer reactivity ratios were calculated by Kelen-Tiidos (KT) and errorin-variables (EVM) methods. T

Synthesis, characterization, and reactiv
Synthesis, characterization, and reactivity ratios of copolymers derived from 4-nitrophenyl acrylate and n-butyl methacrylate
✍ S. Thamizharasi; P. Gnanasundaram; S. Balasubramanian 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 103 KB 👁 2 views

## Abstract Free‐radical copolymerization of 4‐nitrophenyl acrylate (NPA) with __n__‐butyl methacrylate (BMA) was carried out using benzoyl peroxide as an initiator. Seven different mole ratios of NPA and BMA were chosen for this study. The copolymers were characterized by IR, ^1^H‐NMR, and ^13^C‐N