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Titolo:
Miscibility of polycarbonates with copolymers containing cyclohexylmethacrylate
Autore:
Park, DS; Kim, JH; Kim, MJ; Kim, CK; Lee, JW;
Indirizzi:
Chung Ang Univ, Dept Chem Engn, Seoul 156756, South Korea Chung Ang Univ Seoul South Korea 156756 Engn, Seoul 156756, South Korea Sogang Univ, Dept Chem Engn, Seoul 100611, South Korea Sogang Univ SeoulSouth Korea 100611 hem Engn, Seoul 100611, South Korea
Titolo Testata:
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
fascicolo: 16, volume: 39, anno: 2001,
pagine: 1948 - 1955
SICI:
0887-6266(20010815)39:16<1948:MOPWCC>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
BISPHENOL-A POLYCARBONATE; POLY(METHYL METHACRYLATE) BLENDS; INTERACTION PARAMETERS; AMORPHOUS POLYMERS; PHASE-SEPARATION; POLYSTYRENE; BEHAVIOR;
Keywords:
polycarbonates; methacrylate copolymers; blends; lower critical solution temperature; lattice-fluid theory; interaction energies;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Kim, CK Chung Ang Univ, Dept Chem Engn, 221 Huksuk Dong, Seoul 156756, South Korea Chung Ang Univ 221 Huksuk Dong Seoul South Korea 156756 uth Korea
Citazione:
D.S. Park et al., "Miscibility of polycarbonates with copolymers containing cyclohexylmethacrylate", J POL SC PP, 39(16), 2001, pp. 1948-1955

Abstract

We prepared various copolymers containing styrene and methacrylates to examine their miscibility with polycarbonates such as bisphenol A polycarbonate (PC), dimethylpolycarbonate (DMPC), and tetramethylpolycarbonate (TMPC). Among the various copolymers examined, poly(methyl methaerylate-co-cyclohexyhnethacrylate) [P(MMA-CHMA)] copolymers containing proper amounts of cyclohexylmethacrylate (CHMA) formed miscible blends with PC and DMPC, whereas TMPC did not form a miscible blend with P(MMA-CHMA). However, TMPC was miscible with poly(styrene-co-cyclohexylmethacrylate) [P(S-CH-MA)] copolymers containing less than about 40 wt % CHMA, whereas PC and DMPC were always immiscible with P(S-CHMA). Miscible blends exhibited lower critical solution temperature (LCST)-type phase behavior. Binary interaction energies were calculated from the observed phase boundaries with lattice-fluid theory combined with a binary interaction model. The quantitative interaction energy of each binary pair indicated that the phenyl ring substitution of polycarbonate with methyl groups did not lead to interactions that were favorable for miscibility with methyl methacrylate (MMA) and CHMA, but it did lead to favorable interactions with styrene. The addition of CHMA to MMA initially increased the LCST but ultimately led to immiscibility with PC and DMPC; however, addition of CHMA to styrene always decreased the LCST with TMPC. The increased LCST of PC or DMPC blends stemmed from intramolecular repulsion between MMA and CHMA, whereas the decreased LCST of TTdPC/P(S-CHMA) blends withCHMA content came from negative interaction energy between styrene and CHMA. (C) 2001 John Wiley & Sons, Inc. J Polym Sci Part B: Polym Phys 39: 1948-1955, 2001.

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Documento generato il 14/07/20 alle ore 18:39:19