Copolymer composition as a function of molecular weight for poly(styrene-methyl methacrylate) initiated by ethylaluminum sesquichloride

✍ Scribed by R. W. Nunes; S. J. Huang; J. F. Johnson

• Publisher: Society for Plastic Engineers
• Year: 1983
• Tongue: English
• Weight: 392 KB
• Volume: 23
• Category: Article
• ISSN: 0032-3888
• DOI: 10.1002/pen.760230102

✦ Synopsis

Abstract

There is an increasing body of evidence showing that, for a variety of copolymers, there are significant changes in the copolymer composition over the molecular weight distribution of the polymer. In this work, we have polymerized the copolymer poly(styrene‐methyl methacrylate) using ethylaluminum sesquichloride as the initiator. The copolymers produced were fractionated using a semiprep gel permeation chromatograph. The composition of the fractions was determined using infrared spectroscopy. Results show that the percent methyl methacrylate of the copolymers was higher at both the low‐ and high‐molecular‐weight regions of the polymers.