Characterization and physical properties of polymethylphenylsilsesquioxane (PMPSQ) and hydroxyl-functionalized polystyrene (PS-OH) hybrids

Seungpyo Hong, Soon Man Hong, Seung Sang Hwang, Byoung Chul Kim

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Polymethylphenylsilsesquioxane (PMPSQ-OH) and trimethylsilyl end-blocked PMPSQ (PMPSQ-EC) were prepared. The thermal decomposition behavior of these polymers was studied by thermogravimetric analysis (TGA) and FT-Raman spectroscopy. Hydroxyl-functionalized polystyrene (PS-OH) was also prepared by anionic living polymerization. Thin hybrid films of PMPSQ/PS-OH with various blend ratios were obtained by spin-coating on freshly cleaned glass. The surface morphology of the hybrid films was investigated by atomic force microscopy (AFM). In 80/20 PMPSQ/PS-OH hybrid film, the PS-OH component produced a very uniformly dispersed phase. This hybrid film contained small domains of PS-OH whose size ranged from 60 to 80 nm. As the content of PS-OH was increased, the domain morphology coarsened and phase inversion took place around 50 wt %. In the phase-inversed system, the PMPSQ-rich phase was uniformly distributed in the PS-OH-rich continuous phase. In addition, temperature-dependent dielectric properties of PMPSQ/PS-OH hybrids were investigated. Relaxation of the hybrids was observed with an increasing content of the PS-OH component due to the amorphous glass transition behavior of PS-OH.

Original languageEnglish
Pages (from-to)2801-2812
Number of pages12
JournalJournal of Applied Polymer Science
Volume90
Issue number10
DOIs
Publication statusPublished - 2003 Dec 5

Fingerprint

Polystyrenes
Hydroxyl Radical
Physical properties
Living polymerization
Anionic polymerization
Spin coating
Dielectric properties
Surface morphology
Raman spectroscopy
Thermogravimetric analysis
Glass transition
Atomic force microscopy
Polymers
Pyrolysis
Glass
Temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

Cite this

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title = "Characterization and physical properties of polymethylphenylsilsesquioxane (PMPSQ) and hydroxyl-functionalized polystyrene (PS-OH) hybrids",
abstract = "Polymethylphenylsilsesquioxane (PMPSQ-OH) and trimethylsilyl end-blocked PMPSQ (PMPSQ-EC) were prepared. The thermal decomposition behavior of these polymers was studied by thermogravimetric analysis (TGA) and FT-Raman spectroscopy. Hydroxyl-functionalized polystyrene (PS-OH) was also prepared by anionic living polymerization. Thin hybrid films of PMPSQ/PS-OH with various blend ratios were obtained by spin-coating on freshly cleaned glass. The surface morphology of the hybrid films was investigated by atomic force microscopy (AFM). In 80/20 PMPSQ/PS-OH hybrid film, the PS-OH component produced a very uniformly dispersed phase. This hybrid film contained small domains of PS-OH whose size ranged from 60 to 80 nm. As the content of PS-OH was increased, the domain morphology coarsened and phase inversion took place around 50 wt {\%}. In the phase-inversed system, the PMPSQ-rich phase was uniformly distributed in the PS-OH-rich continuous phase. In addition, temperature-dependent dielectric properties of PMPSQ/PS-OH hybrids were investigated. Relaxation of the hybrids was observed with an increasing content of the PS-OH component due to the amorphous glass transition behavior of PS-OH.",
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Characterization and physical properties of polymethylphenylsilsesquioxane (PMPSQ) and hydroxyl-functionalized polystyrene (PS-OH) hybrids. / Hong, Seungpyo; Hong, Soon Man; Hwang, Seung Sang; Kim, Byoung Chul.

In: Journal of Applied Polymer Science, Vol. 90, No. 10, 05.12.2003, p. 2801-2812.

Research output: Contribution to journalArticle

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AB - Polymethylphenylsilsesquioxane (PMPSQ-OH) and trimethylsilyl end-blocked PMPSQ (PMPSQ-EC) were prepared. The thermal decomposition behavior of these polymers was studied by thermogravimetric analysis (TGA) and FT-Raman spectroscopy. Hydroxyl-functionalized polystyrene (PS-OH) was also prepared by anionic living polymerization. Thin hybrid films of PMPSQ/PS-OH with various blend ratios were obtained by spin-coating on freshly cleaned glass. The surface morphology of the hybrid films was investigated by atomic force microscopy (AFM). In 80/20 PMPSQ/PS-OH hybrid film, the PS-OH component produced a very uniformly dispersed phase. This hybrid film contained small domains of PS-OH whose size ranged from 60 to 80 nm. As the content of PS-OH was increased, the domain morphology coarsened and phase inversion took place around 50 wt %. In the phase-inversed system, the PMPSQ-rich phase was uniformly distributed in the PS-OH-rich continuous phase. In addition, temperature-dependent dielectric properties of PMPSQ/PS-OH hybrids were investigated. Relaxation of the hybrids was observed with an increasing content of the PS-OH component due to the amorphous glass transition behavior of PS-OH.

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