Poly Vinyl Caprolactam Polymerization Using Igracure

A versatile model for ε caprolactam polymerization is presented.

Poly vinyl caprolactam polymerization using igracure.

Atom transfer radical polymerization atrp of n vinylcaprolactam nvcl was studied by uisng ethyl 2 bromoisobutyrate eib as initiator in 1 4 dioxane it led to controlled radical polymerization of nvcl with the molecular weight increased along with the conversion of monomer and a relatively narrow molecular weight distribution could be obtained as determined by gel permeation. Chemistry of caprolactam polymerization. In this study n vinylcaprolactam was polymerized by free radical polymerization at 50 60 and 70 c. The dsc thermogram.

The synthesized polymers were white powder soluble in water and common organic solvents. Continuous polycaproamide production has been modeled and shown to give othe than most probable distribution in many cases. Polymer was characterized by ftir 1 h nmr and 13 c nmr dsc tga and xrd techniques. The activation energy of polymerization was calculated as 108 4 kj mol from the arrhenius plot.

A deterministic mathematical basis for obtaining the most probable distribution of molecular weights in batch polymerization is developed. The analyses comprised quantitative determination of unconverted cl cyclic oligomers monomeric ϵ aminocaproic acid. Synthesis characterization and properties international journal of polymer analysis and characterization 10 1080 1023666x 2011 622103 16 8 561 583 2011. The kinetics of anionic caprolactam polymerization in the presence of mono and diimides was studied at 150 c by isothermal calorimeter method using the differential isothermal calorimeter dak 1.

Up to now immobilize tio 2 nanoparticle with pnvcl via controlled radical polymerization has not been reported. Number average degree of polymerization d p of chain fraction varying from 100 to 10. Poly n vinyl caprolactam pnvcl undergo phase transition at molecular weight dependent temperature. Ftir and nmr results showed that polymerization takes place by opening of carbon carbon double bond without any change in the caprolactam ring.

Pnvcl fits the group of poly n vinylamide polymers as it is water soluble a non ionic andwhenatalmost32 c has the lcst value in an aque. Caprolactam the generality reported the most commonly studied ther moresponsive polymer in aqueous solution is poly n vinyl caprolactam pnvcl due to being close to the temper ature after of pnipam. Poly n vinylcaprolactam pnvcl is a temperature responsive polymer only second to poly n isopropylacrylamide the most popular temperature responsive polymer its applications include its use in cosmetics as an anticlogging agent in pipelines and increasingly in biomedical applications.