𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Amine activators for the “cool” peroxide initiated polymerization of acrylic monomers

✍ Scribed by Carlos Elvira; Belén Levenfeld; Blanca Vázquez; Julio San Román

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
487 KB
Volume
34
Category
Article
ISSN
0887-624X

No coin nor oath required. For personal study only.

✦ Synopsis

Two tertiary amines with a chemical structure rather similar to dimethyl-4-toluidine have been prepared and tested as activators for the free radical polymerization of methyl methacrylate. 4-Dimethylaminobenzyl alcohol, DMOH, was synthesized by reduction of the corresponding benzaldehyde. 4-Dimethylaminobenzyl methacrylate, DMMO, was synthesized by condensation of methacryloyl chloride with DMOH in the presence of triethylamine as catalyst. Kinetic studies of the bulk polymerization of methyl methacrylate initiated by the redox system BPO-amine have been carried out by differential scanning calorimetry a t different temperatures in the interval 30-40°C. An increase of the overall rate constant, k , with increasing temperature was observed for all redox systems. The system BPO/DMT gave the highest values of k. The polymerizations catalyzed by DMOH and DMMO respectively gave lower values of the overall Arrhenius activation than that obtained with DMT. DMMO may participate in the polymerization not only as activator but also as an acrylic derivative which can be incorporated into the polymeric growing chains during the propagation step of the free radical polymerization. 0

📜 SIMILAR VOLUMES

Introduction of peroxide groups onto car
Introduction of peroxide groups onto carbon black surface by radical trapping and radical graft polymerization of vinyl monomers initiated by the surface peroxide groups
✍ Shinji Hayashi; Satoshi Handa; Norio Tsubokawa 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 498 KB 👁 2 views

The introduction of peroxide groups onto carbon black surface was achieved through the trapping of the peroxide radicals formed by the decomposition of polymeric peroxide, such as poly(tetraethy1ene glycol peroxyadipate) (ATPPO), and bis-peroxide, such as l,l'-bis(t-buty1dioxy)cyclohexane (Perhexa-C

Polymerization of carboxyl group contain
Polymerization of carboxyl group containing monomers with chemical initiators. Part III. Polymerization of acrylic acid induced by the persulphate/sulphite redox system
✍ S. A. Abdel Hafiz; F. El-Sisi; A. Higazy; A. Hebeish 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 422 KB 👁 2 views

## Abstract The polymerization of acrylic acid by the redox system ammonium persulphate/sodium sulphite was studied under a variety of conditions. The obtained results indicate that the total conversion is determined by the concentrations of (NH~4~)~2~S~2~O~8~ and Na~2~SO~3~, as well as by the degr

Radical polymerization of vinyl monomers
Radical polymerization of vinyl monomers in the presence of carbon black initiated by 2,2'-azobisisobutyronitrile and benzoyl peroxide in ionic liquid
✍ Jun Ueda; Hiroshi Yamaguchi; Kumi Shirai; Takeshi Yamauchi; Norio Tsubokawa 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 167 KB 👁 2 views

## Abstract The radical polymerization behavior of vinyl monomers, such as styrene, methyl methacrylate (MMA), and vinyl acetate (VAc), in the presence of carbon black initiated by benzoyl peroxide (BPO) and 2,2'‐azobisisobutyronitrile (AIBN) in ionic liquid (IL) was compared with those in toluene.