Dynamic-mechanical and dielectric relaxations of SBS block copolymer: polyaniline blends prepared by mechanical mixing (Record no. 42707)

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control field MX-MdCICY
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control field 20250625124719.0
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Transcribing agency CICY
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Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-8403
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fixed length control field 250602s9999 xx |||||s2 |||| ||und|d
245 10 - TITLE STATEMENT
Title Dynamic-mechanical and dielectric relaxations of SBS block copolymer: polyaniline blends prepared by mechanical mixing
490 0# - SERIES STATEMENT
Volume/sequential designation Polymer, 43(26), p.7505-7315, 2002
520 3# - SUMMARY, ETC.
Summary, etc. Blends of SBS with polyaniline doped with dodecylbenzenesulfonic acid (Pani·DBSA)or its deprotonated form (emeraldine base)were obtained by mechanical mixing and characterized by dynamical-mechanical and dielectric thermal analysis techniques. The dynamicmechanical characterization revealed that both Pani·DBSA and its non-conducting, deprotonated form exhibits different degrees of interaction with the two phases of the SBS block copolymer. The tan d peak position on temperature scale corresponding to the Tg of the PB block did not change with the addition of the conducting polymer, but there is progressive drop of peak height with the increase in Pani·DBSA concentration, probably because of the rigidity of this component. The activation energies Ea for glass-rubber transition process for both the phases of SBS were calculated using Arrhenius equation from DMTA results. From dielectric studies, it was possible to detect conductivity relaxations, at temperatures above the glass transition of the PS phase. Concerning the blend with 15 wt
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element STYRENE-BUTADIENE-STYRENE
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element POLYANILINE
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element DMTA
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Leyva, M.E.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Soares, B.G.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Khastgi, D.
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