Homo PVC and olefin-vinylchloride copolymers have been prepared by free-radical copolymerization at 60℃.
Molecular weights of PVC and copolymers have been caracterized by gel permeation chromatography (GPC) and C-NMR. We are used to calculate the ...
Homo PVC and olefin-vinylchloride copolymers have been prepared by free-radical copolymerization at 60℃.
Molecular weights of PVC and copolymers have been caracterized by gel permeation chromatography (GPC) and C-NMR. We are used to calculate the tacticity shifts in the C-NMR spectra of PVC and copolymers by Bovey first order Markov statistics.
Copolymers of vinyl chloride with isobutylene, propylene from 1.58 to 8.0mol% olefin, is found to random arrangment by ??C-NMR spectroscopy.
The values of molecular weights of the copolymer ranged from 2.38 to 7.03×10⁴, measured by GPC. It was found that both the degree of conversion and molecular weight decreased in accordance with the increase of comonomer ratio in the copolymer.