Poly Vinyl Caprolactam Polymerization Using Igracure

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.

Poly vinyl caprolactam polymerization using igracure.

Synthesis characterization and properties international journal of polymer analysis and characterization 10 1080 1023666x 2011 622103 16 8 561 583 2011. Ftir and nmr results showed that polymerization takes place by opening of carbon carbon double bond without any change in the caprolactam ring. The analyses comprised quantitative determination of unconverted cl cyclic oligomers monomeric ϵ aminocaproic acid. 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.

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. Number average degree of polymerization d p of chain fraction varying from 100 to 10. In this study n vinylcaprolactam was polymerized by free radical polymerization at 50 60 and 70 c. In this work surface initiate raft polymerization of pnvcl is investigated.

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. Poly n vinyl caprolactam pnvcl undergo phase transition at molecular weight dependent temperature. A versatile model for ε caprolactam polymerization is presented. Continuous polycaproamide production has been modeled and shown to give othe than most probable distribution in many cases.

The dsc thermogram. This review highlights the controlled synthesis of pnvcl in different architectures. Up to now immobilize tio 2 nanoparticle with pnvcl via controlled radical polymerization has not been reported. Polymer was characterized by ftir 1 h nmr and 13 c nmr dsc tga and xrd techniques.

The synthesized polymers were white powder soluble in water and common organic solvents. A deterministic mathematical basis for obtaining the most probable distribution of molecular weights in batch polymerization is developed. The activation energy of polymerization was calculated as 108 4 kj mol from the arrhenius plot.