Co-polymerization of 4-biphenyl methacrylate with methyl methacrylate: synthesis, characterization and determination of monomer reactivity ratios

Authors: Vijayanand, P.S.; Kato, S.; Koyama, M.; Satokawa, S.; Kojima, T.

Source: Designed Monomers & Polymers, Volume 10, Number 4, 2007 , pp. 375-388(14)

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Abstract:

Co-polymerization of BPM with methyl methacrylate (MMA) has been carried out in methyl ethyl ketone (MEK) by free radical solution polymerization at 70 ± 1°C utilizing benzoyl peroxide (BPO) as initiator. Poly(BPM-co-MMA) co-polymers were characterized by FT-IR, ¹H-NMR and ¹³C-NMR spectroscopy. The molecular weights (M_w and M_n) and polydispersity indices (M_w//M_n) of the polymers were determined using gel permeation chromatograph. The glass transistion temperatures (T_g) of the co-polymer increases with MMA content. Thermogravimetric analysis of the polymers performed in nitrogen shows that the stability of the co-polymer increases with an increase in BPM content. The solubility of the polymers was tested in various polar and nonpolar solvents. Co-polymer compositions were determined by ¹H-NMR spectroscopy by comparing the integral peak heights of well separated aromatic and aliphatic protons peaks. The monomer reactivity ratios were determined using Fineman-Ross (r₁ = 1.70 ± 0.054, r₂ = 0.065 ± 0.004), Kelen-Tudos (r₁ = 1.73 ± 0.035, r₂ = 0.077 ± 0.008) and extended Kelen-Tudos methods (r₁ = 1.866 ± 0.100, r₂ = 0.069 ± 0.008).

Keywords: 4-BIPHENYL METHACRYLATE; CO-POLYMERIZATION; REACTIVITY RATIOS; METHYL METHACRYLATE; THERMAL STUDIES

Document Type: Research article

DOI: http://dx.doi.org/10.1163/156855507781505156

Affiliations: 1: Department of Materials and Life Science, Seikei University, 3-1 Kichijoji-Kitamachi 3-Chome, Musashino-shi, Tokyo 180-8633, Japan

Publication date: 2007-07-01