Dilute solution properties of randomly branched poly(methyl methacrylate)

✍ Scribed by Christian Jackson; Yuan-Ju Chen; Jimmy W. Mays

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 628 KB
• Volume: 59
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19960103)59:1<179::aid-app23>3.0.co;2-u

✦ Synopsis

SYNOPSIS

Randomly branched poly(methy1 methacrylate) samples were prepared by copolymerization with different amounts of ethylene dimethacrylate. The molecular weight distributions, radius of gyration distributions, and intrinsic viscosity distributions were measured by size exclusion chromatography with refractive index, multiangle light-scattering, and viscosity detectors. The effect of branching on the radius of gyration was compared with the effect on the intrinsic viscosity. It was found that the intrinsic viscosity contraction factor g' scales with the radius of gyration contraction factor g, with the exponent, 6, having a value in the range 0.8-1.0.