Phase behavior of complementary multiply hydrogen bonded end-functional polymer blends

K. Feldman, M.J. Kade, E.W. Meijer, C.J. Hawker, E.J. Kramer

Research output: Contribution to journalArticleAcademicpeer-review

69 Citations (Scopus)

Abstract

Blends of diamidonaphthyridine (Napy) end-functional poly(n-butyl acrylate) (PnBA) and ureidopyrimidinone (UPy) end-functional poly(benzyl methacrylate) (PbnMA) were studied as a function of the component molecular weights to compare with prior theoretical predictions.(1) Macroscopic phase separation was observed to be prevented by the reversible association of end-functional polymers to form supramolecular diblock copolymers, resulting in stabilization of the interface between the polymers. At low molecular weights homogeneous microstructures were observed, in contrast to nonfunctional homopolymer blends of the same molecular lengths, which rapidly phase separate over macroscopic length scales. At higher molecular weights, the blend structure was reminiscent of compatibilized homopolymer blends, with the phase-separated domain size rapidly increasing with temperature. To compare with theoretical phase diagrams, the temperature-dependent Flory-Huggins ¿ parameter was measured, and it was found that PnBA/PbnMA covalent diblock copolymers show unusual lower critical ordering (LCOT) behavior with ¿ slightly increasing with temperature (¿(T) = 0.036 - 0.56/T).
Original languageEnglish
Pages (from-to)5121-5127
Number of pages6
JournalMacromolecules
Volume43
Issue number11
DOIs
Publication statusPublished - 2010

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Functional polymers
Polymer blends
Phase behavior
Hydrogen
Molecular weight
Homopolymerization
Block copolymers
Phase separation
Temperature
Phase diagrams
Polymers
Stabilization
Association reactions
Microstructure
benzyl methacrylate
poly(n-butyl acrylate)

Cite this

Feldman, K. ; Kade, M.J. ; Meijer, E.W. ; Hawker, C.J. ; Kramer, E.J. / Phase behavior of complementary multiply hydrogen bonded end-functional polymer blends. In: Macromolecules. 2010 ; Vol. 43, No. 11. pp. 5121-5127.
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title = "Phase behavior of complementary multiply hydrogen bonded end-functional polymer blends",
abstract = "Blends of diamidonaphthyridine (Napy) end-functional poly(n-butyl acrylate) (PnBA) and ureidopyrimidinone (UPy) end-functional poly(benzyl methacrylate) (PbnMA) were studied as a function of the component molecular weights to compare with prior theoretical predictions.(1) Macroscopic phase separation was observed to be prevented by the reversible association of end-functional polymers to form supramolecular diblock copolymers, resulting in stabilization of the interface between the polymers. At low molecular weights homogeneous microstructures were observed, in contrast to nonfunctional homopolymer blends of the same molecular lengths, which rapidly phase separate over macroscopic length scales. At higher molecular weights, the blend structure was reminiscent of compatibilized homopolymer blends, with the phase-separated domain size rapidly increasing with temperature. To compare with theoretical phase diagrams, the temperature-dependent Flory-Huggins ¿ parameter was measured, and it was found that PnBA/PbnMA covalent diblock copolymers show unusual lower critical ordering (LCOT) behavior with ¿ slightly increasing with temperature (¿(T) = 0.036 - 0.56/T).",
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Phase behavior of complementary multiply hydrogen bonded end-functional polymer blends. / Feldman, K.; Kade, M.J.; Meijer, E.W.; Hawker, C.J.; Kramer, E.J.

In: Macromolecules, Vol. 43, No. 11, 2010, p. 5121-5127.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Phase behavior of complementary multiply hydrogen bonded end-functional polymer blends

AU - Feldman, K.

AU - Kade, M.J.

AU - Meijer, E.W.

AU - Hawker, C.J.

AU - Kramer, E.J.

PY - 2010

Y1 - 2010

N2 - Blends of diamidonaphthyridine (Napy) end-functional poly(n-butyl acrylate) (PnBA) and ureidopyrimidinone (UPy) end-functional poly(benzyl methacrylate) (PbnMA) were studied as a function of the component molecular weights to compare with prior theoretical predictions.(1) Macroscopic phase separation was observed to be prevented by the reversible association of end-functional polymers to form supramolecular diblock copolymers, resulting in stabilization of the interface between the polymers. At low molecular weights homogeneous microstructures were observed, in contrast to nonfunctional homopolymer blends of the same molecular lengths, which rapidly phase separate over macroscopic length scales. At higher molecular weights, the blend structure was reminiscent of compatibilized homopolymer blends, with the phase-separated domain size rapidly increasing with temperature. To compare with theoretical phase diagrams, the temperature-dependent Flory-Huggins ¿ parameter was measured, and it was found that PnBA/PbnMA covalent diblock copolymers show unusual lower critical ordering (LCOT) behavior with ¿ slightly increasing with temperature (¿(T) = 0.036 - 0.56/T).

AB - Blends of diamidonaphthyridine (Napy) end-functional poly(n-butyl acrylate) (PnBA) and ureidopyrimidinone (UPy) end-functional poly(benzyl methacrylate) (PbnMA) were studied as a function of the component molecular weights to compare with prior theoretical predictions.(1) Macroscopic phase separation was observed to be prevented by the reversible association of end-functional polymers to form supramolecular diblock copolymers, resulting in stabilization of the interface between the polymers. At low molecular weights homogeneous microstructures were observed, in contrast to nonfunctional homopolymer blends of the same molecular lengths, which rapidly phase separate over macroscopic length scales. At higher molecular weights, the blend structure was reminiscent of compatibilized homopolymer blends, with the phase-separated domain size rapidly increasing with temperature. To compare with theoretical phase diagrams, the temperature-dependent Flory-Huggins ¿ parameter was measured, and it was found that PnBA/PbnMA covalent diblock copolymers show unusual lower critical ordering (LCOT) behavior with ¿ slightly increasing with temperature (¿(T) = 0.036 - 0.56/T).

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DO - 10.1021/ma1003776

M3 - Article

VL - 43

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JF - Macromolecules

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