M. Penco
University of Pisa
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Featured researches published by M. Penco.
Reactive Polymers, Ion Exchangers, Sorbents | 1985
Salvatore D'Antone; M. Penco; Roberto Solaro; Emo Chiellini
Abstract The preparation of linear and crosslinked functional polymers designed for catalytic applications in phase transfer reactions is reported. Polymers containing either quaternary ammonium groups or oligoether moieties (glymes and crown ethers) in the side chain, experiencing a prevailing chirality, are described. Procedures based on direct polymerization of a chiral monomer with a functional comonomer, chemical transformation of preformed chiral copolymers and the use of optically active porogens have been adopted for the formulation of catalytically active polymers. Reduction of prochiral alkyl ketones, alkylation of phenylacetonitrile and oxidation of racemic alcohols have been taken as test reactions for catalyst activity, in terms of chemical kinetics and stereochemical control. In spite of the improved chemical stability and maintenance of the chiral integrity, the polymeric catalysts investigated do not seem able to exert enantio-selective discrimination on any of the prochiral or chiral substrates examined.
IV INTERNATIONAL CONFERENCE TIMES OF POLYMERS (TOP) AND COMPOSITES | 2008
M. Penco; Gloria Spagnoli; S. Della Sciucca; Filippo Samperi; Raniero Mendichi
The structural relaxation of PMMA copolymers with different chain flexibility has been studied by DSC with two classical procedures, namely: the rate of cooling and the isothermal approaches. The apparent activation energy of enthalpy relaxation was evaluated from the dependence of the glass transition temperature on the cooling rate while a comparison of the apparent relaxation rates was appraised from the enthalpy loss by annealing the different samples at the same level of undercooling (Ta = Tg−18 °C).
XX Convegno Italiano di Scienza e Tecnologia delle Macromolecole (AIM) | 2011
Arifur Rahman; M. Penco; Gloria Spagnoli; L. Di Landro; M.R. Pagano
Archive | 2011
M. Penco; Andrea Lazzeri; Thanh Vu Phuong
POLYMERS RESEARCH JOURNAL | 2009
M. Penco; S. Della Sciucca; Gloria Spagnoli; L. Di Landro
Archive | 2009
M. Penco; S. Della Sciucca; Gloria Spagnoli; L. Di Landro
XVIII Convegno Italiano di Scienza e Tecnologia delle Macromolecole | 2007
Luciana Sartore; A. Sassi; M. Penco; L. Di Landro
XVIII Convegno Italiano di Scienza e Tecnologia delle Macromolecole | 2007
M. Penco; Luciana Sartore; Elisa Passaglia; F. Ciardelli; Guido Giordani; Serena Coiai; L. Di Landro
XVII Convegno Italiano di Scienza e Tecnologia delle Macromolecole | 2005
M. Penco; Luciana Sartore; S. Della Sciucca; F. Branca Vergano; L. Di Landro; Salvatore D'Antone
VII Convegno Nazionale AIMAT | 2004
M. Penco; Luciana Sartore; A. Lazzeri; L. Di Landro; Salvatore D'Antone