title: A New Route for High-Purity Organic Materials: High-Pressure-Ramp-Induced Ultrafast Polymerization of 2-(Hydroxyethyl)Methacrylate.
abstract: The synthesis of highly biocompatible polymers is important for modern biotechnologies and medicine. Here, we report a unique process based on a two-step high-pressure ramp (HPR) for the ultrafast and efficient bulk polymerization of 2-(hydroxyethyl)methacrylate (HEMA) at room temperature without photo- and thermal activation or addition of initiator. The HEMA monomers are first activated during the compression step but their reactivity is hindered by the dense glass-like environment. The rapid polymerization occurs in only the second step upon decompression to the liquid state. The conversion yield was found to exceed 90% in the recovered samples. The gel permeation chromatography evidences the overriding role of HEMA2(••) biradicals in the polymerization mechanism. The HPR process extends the application field of HP-induced polymerization, beyond the family of crystallized monomers considered up today. It is also an appealing alternative to typical photo- or thermal activation, allowing the efficient synthesis of highly pure organic materials.
authors.affiliation: Laboratoire de Physique des Lasers - LPL, CNRS, Université Paris 13, Sorbonne Paris Cité, 93430 Villetaneuse, France.
authors.forename: E
authors.initials: E
authors.lastname: Evlyukhin
authors.affiliation: Laboratoire de Physique des Lasers - LPL, CNRS, Université Paris 13, Sorbonne Paris Cité, 93430 Villetaneuse, France.
authors.forename: L
authors.initials: L
authors.lastname: Museur
authors.affiliation: Laboratoire des Sciences des Procédés et des Matériaux - LSPM, CNRS, Université Paris 13, Sorbonne Paris Cité, 93430 Villetaneuse, France.
authors.forename: M
authors.initials: M
authors.lastname: Traore
authors.affiliation: Laboratoire Interfaces Traitements Organisation et Dynamique des Systèmes - ITODYS CNRS, Université Paris Diderot Paris 7, Sorbonne Paris Cité, 75205 Paris Cedex 13, France.
authors.forename: C
authors.initials: C
authors.lastname: Perruchot
authors.affiliation: Laboratoire des Sciences des Procédés et des Matériaux - LSPM, CNRS, Université Paris 13, Sorbonne Paris Cité, 93430 Villetaneuse, France.
authors.forename: A
authors.initials: A
authors.lastname: Zerr
authors.affiliation: Laboratoire des Sciences des Procédés et des Matériaux - LSPM, CNRS, Université Paris 13, Sorbonne Paris Cité, 93430 Villetaneuse, France.
authors.forename: A
authors.initials: A
authors.lastname: Kanaev