๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Radical polymerization of methyl methacrylate with benzyl triphenylphosphonium bromide

โœ Scribed by U.D.N. Bajpai; Takayuki Otsu

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
270 KB
Volume
29
Category
Article
ISSN
0014-3057

No coin nor oath required. For personal study only.

โœฆ Synopsis

The photopolymerization of methyl methacrylate with benzyl tripbenylphosphonium bromide has been studied in order to assess whether this system follows a living radical polymerization mechanism. Rate of polymerization is found to increase linearly with monomer concentration and 0.31 power with respect to photoinitiator concentration. The overall activation energy is 27.7 kJ/mol within the studied temperature range 25-40 ยฐ. Hydroquinone inhibits the polymerization. The molecular weight of the resulting polymer does not increase with increase with conversion and time. This result indicates that the system does not conform to the living radical polymerization model and is a case of ordinary radical polymerization.

๐Ÿ“œ SIMILAR VOLUMES

Photopolymerization of methyl methacryla
Photopolymerization of methyl methacrylate with binary system of triphenylphosphine and benzyl bromide
โœ U.D.N. Bajpai; T. Otsu ๐Ÿ“‚ Article ๐Ÿ“… 1993 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 287 KB

The photopolymerization of methyl methacrylate (MMA) initiated by a binary system consisting of triphenylphosphine (TPP) and benzyl bromide was studied in order to compare the initiating efficiency of the binary system with that of the corresponding quaternary salt. The studies were also undertaken

Radical polymerization of methyl methacr
Radical polymerization of methyl methacrylate in the presence of magnesium bromide as the Lewis acid
โœ Akikazu Matsumoto; Shoji Nakamura ๐Ÿ“‚ Article ๐Ÿ“… 1999 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 130 KB ๐Ÿ‘ 3 views

We carried out the radical polymerization of methyl methacrylate (MMA) at 0 -80ยฐC in the presence of magnesium bromide. The polymerization rate and the molecular weight of the resulting polymers increased according to the amount of the added magnesium bromide as the Lewis acid. It was revealed that

Effect of LiClO4 on radical polymerizati
Effect of LiClO4 on radical polymerization of methyl methacrylate
โœ Makiko Seno; Nobuyuki Matsumura; Hiroyuki Nakamura; Tsuneyuki Sato ๐Ÿ“‚ Article ๐Ÿ“… 1997 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 203 KB ๐Ÿ‘ 2 views

The effect of LiClO 4 on the polymerization of methyl methacrylate (MMA) with dimethyl 2,2-azobisisobutyrate (MAIB) was investigated at 50ะŠC in methyl ethyl ketone. The polymerization proceeded homogeneously even at [LiClO 4 ] as high as 3.00 mol/L. The polymerization rate (R p ) and the molecular w