Modification of poly(styrene-stat-acrylonitrile) to promote polymer blend miscibility through hydrogen-bonded (2,4-diamino-1,3,5-triazine)-maleimide interactions

J. M G Cowie, D. Cocton

Research output: Contribution to journalArticle

Abstract

The acrylonitrile units in poly(styrene-stat-acrylonitrile) (SAN) have been partially converted to the 2,4-diamino-1,3,5-triazine (DAT) moiety by the reaction with dicyandiamide in dry dimethyl sulfoxide, containing catalytic amounts of potassium hydroxide. This produced a range of terpolymers of poly(styrene-stat-acrylonitrile-stat-vinyl 2,4-diamino-1,3,5-triazine) with mol% composition in the range (54.3:43.0:2.7) to (54.3:25.0:20.7). Copolymers of methyl acrylate (MA) and maleimide (MI) were also synthesised and used to prepare blends with the modified SAN terpolymers. Here the triazine rings and the maleimide units can form complementary pairs of donor-acceptor-donor (DAD) and (ADA), triple hydrogen bonding sites. It was found that miscible, one-phase, polymer blends could be formed if the DAT content of the modified SAN terpolymers was = 10 mol% and the MI content of the (MA-MI) copolymers was > 22 mol%, or alternatively if the MI content was 9-14 mol% and the corresponding DAT content in the modified SAN was = 21 mol%. Once formed these secondary interactions were stable up to the onset of degradation of the blends and there was no evidence of a lower critical temperature for phase separation. © 1998 Elsevier Science Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)227-231
Number of pages5
JournalPolymer
Volume40
Issue number1
Publication statusPublished - Jan 1999

Fingerprint

Acrylonitrile
Triazines
Styrene
Polymer blends
Hydrogen
Solubility
Terpolymers
Copolymers
Dimethyl Sulfoxide
Phase separation
maleimide
Hydrogen bonds
Degradation
Chemical analysis

Keywords

  • (Styrene-acrylonitrile-vinyl triazine) terpolymers
  • Polymer blends
  • Site-specific interactions

Cite this

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title = "Modification of poly(styrene-stat-acrylonitrile) to promote polymer blend miscibility through hydrogen-bonded (2,4-diamino-1,3,5-triazine)-maleimide interactions",
abstract = "The acrylonitrile units in poly(styrene-stat-acrylonitrile) (SAN) have been partially converted to the 2,4-diamino-1,3,5-triazine (DAT) moiety by the reaction with dicyandiamide in dry dimethyl sulfoxide, containing catalytic amounts of potassium hydroxide. This produced a range of terpolymers of poly(styrene-stat-acrylonitrile-stat-vinyl 2,4-diamino-1,3,5-triazine) with mol{\%} composition in the range (54.3:43.0:2.7) to (54.3:25.0:20.7). Copolymers of methyl acrylate (MA) and maleimide (MI) were also synthesised and used to prepare blends with the modified SAN terpolymers. Here the triazine rings and the maleimide units can form complementary pairs of donor-acceptor-donor (DAD) and (ADA), triple hydrogen bonding sites. It was found that miscible, one-phase, polymer blends could be formed if the DAT content of the modified SAN terpolymers was = 10 mol{\%} and the MI content of the (MA-MI) copolymers was > 22 mol{\%}, or alternatively if the MI content was 9-14 mol{\%} and the corresponding DAT content in the modified SAN was = 21 mol{\%}. Once formed these secondary interactions were stable up to the onset of degradation of the blends and there was no evidence of a lower critical temperature for phase separation. {\circledC} 1998 Elsevier Science Ltd. All rights reserved.",
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Modification of poly(styrene-stat-acrylonitrile) to promote polymer blend miscibility through hydrogen-bonded (2,4-diamino-1,3,5-triazine)-maleimide interactions. / Cowie, J. M G; Cocton, D.

In: Polymer, Vol. 40, No. 1, 01.1999, p. 227-231.

Research output: Contribution to journalArticle

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AB - The acrylonitrile units in poly(styrene-stat-acrylonitrile) (SAN) have been partially converted to the 2,4-diamino-1,3,5-triazine (DAT) moiety by the reaction with dicyandiamide in dry dimethyl sulfoxide, containing catalytic amounts of potassium hydroxide. This produced a range of terpolymers of poly(styrene-stat-acrylonitrile-stat-vinyl 2,4-diamino-1,3,5-triazine) with mol% composition in the range (54.3:43.0:2.7) to (54.3:25.0:20.7). Copolymers of methyl acrylate (MA) and maleimide (MI) were also synthesised and used to prepare blends with the modified SAN terpolymers. Here the triazine rings and the maleimide units can form complementary pairs of donor-acceptor-donor (DAD) and (ADA), triple hydrogen bonding sites. It was found that miscible, one-phase, polymer blends could be formed if the DAT content of the modified SAN terpolymers was = 10 mol% and the MI content of the (MA-MI) copolymers was > 22 mol%, or alternatively if the MI content was 9-14 mol% and the corresponding DAT content in the modified SAN was = 21 mol%. Once formed these secondary interactions were stable up to the onset of degradation of the blends and there was no evidence of a lower critical temperature for phase separation. © 1998 Elsevier Science Ltd. All rights reserved.

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