| Download | - View final version: Viscoelastic properties of immiscible telechelic polymer blends : effect of acid-base interactions (PDF, 1.2 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1021/ma00036a015 |
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| Author | Search for: Charlier, Pascal; Search for: Jerome, Robert; Search for: Teyssie, Philippe; Search for: Utracki, L. A.1 |
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| Affiliation | - National Research Council Canada. NRC Industrial Materials Institute
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| Format | Text, Article |
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| Abstract | When a telechelic polyisoprene (PIP) end-capped with tertiary amine groups is blended with
an immiscible telechelic polystyrene (PS) terminated with either sulfonic or carboxylic acid functions, a
proton transfer occurs from the acid to the amine end groups. Viscoelastic properties of these blends support
the formation of either ammonium sulfonate or ammonium carboxylate linkages between PS and PIP in a
manner analogous to block copolymerization. Due to the low stability of ammonium carboxylates, the related
polyblends have been investigated up to 100 °C and they show Te of each polymeric partner. When PS and
PIP chain ends are associated through more thermally stable ammonium sulfonates, the thermal dependences
of storage and loss shear moduli show two additional relaxation processes at least in some range of
PSand PIP molecular weights. By analogy with SAXS analysis of similar polyblends, these relaxations have
been assigned to a classic order-disorder transition similar to that seen in. traditional block copolymers and
to the irreversible dissociation of the sulfonate salts at higher temperatures, respectively. These additional
transitions which involve a change in phase morphology have been confirmed by the “Cole-Cole” log G" vs
log G' plots. |
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| Publication date | 1992-05-01 |
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| Publisher | American Chemical Society |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NRC number | CNRC 36634
NRC-IMI93AP-32700-1530-G |
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| NPARC number | 23003989 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | b193d94f-839e-4bf6-8e07-c9c3ebeddb71 |
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| Record created | 2018-09-11 |
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| Record modified | 2020-05-30 |
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