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Titolo:
Synthesis and physical characterization of semi-IPNs of linear polyurethane and heterocyclic polymer network
Autore:
Bartolotta, A; Di Marco, G; Carini, G; DAngelo, G; Tripodo, G; Fainleib, AM; Slinchenko, EA; Shtompel, VI; Privalko, VP;
Indirizzi:
Natl Acad Sci Ukraine, Inst Macromol Chem, UA-253160 Kyiv, Ukraine Natl Acad Sci Ukraine Kyiv Ukraine UA-253160 em, UA-253160 Kyiv, Ukraine Univ Messina, Dipartimento Fis, I-98166 Messina, Italy Univ Messina Messina Italy I-98166 artimento Fis, I-98166 Messina, Italy Univ Messina, INFM, I-98166 Messina, Italy Univ Messina Messina Italy I-98166 Messina, INFM, I-98166 Messina, Italy CNR, Ist Tecn Spettroscopiche, I-98166 Messina, Italy CNR Messina Italy I-98166 t Tecn Spettroscopiche, I-98166 Messina, Italy
Titolo Testata:
POLYMER ENGINEERING AND SCIENCE
fascicolo: 3, volume: 39, anno: 1999,
pagine: 549 - 558
SICI:
0032-3888(199903)39:3<549:SAPCOS>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
THERMODYNAMIC CHARACTERIZATION; MOLECULAR MOBILITY; ELECTROLYTES; CATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Privalko, VP Natl Acad Sci Ukraine, Inst Macromol Chem, UA-253160 Kyiv, Ukraine Natl Acad Sci Ukraine Kyiv Ukraine UA-253160 Kyiv, Ukraine
Citazione:
A. Bartolotta et al., "Synthesis and physical characterization of semi-IPNs of linear polyurethane and heterocyclic polymer network", POLYM ENG S, 39(3), 1999, pp. 549-558

Abstract

Semi-interpenetrating polymer networks (semi-IPN) of linear polyurethane (LPU) and heterocyclic polymer network (HPN) were characterized by IR spectroscopy, small-angle X-ray scattering, differential calorimetry with diathermal shells (temperature interval 130-500 K), and dynamic mechanical analysis (temperature interval 150-500 K and frequency range 0.3-30 Hz). The main results obtained may be summarized as follows: 1) The affinity of HPN towards the soft LPU microphase is responsible for the absence of large-scale heterogeneity of semi-IPNs on their base (at least, at low HPN/LPU ratios). 2) Phenomenological analysis of small-scale, Arrhenius-like subglass relaxations (gamma(1) and gamma(2) in LPU and in HPN, respectively) revealed little interference of HPN with relaxation centers (RCs) of LPU in semi-IPNs, while the local environment of RCs in HPN, on the contrary, strongly dependedon semi-IPN composition.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 10:12:04