Microstructure and properties of 3,3 ',4,4 '-biphenyltetracarboxylic dianhydride (BPDA)-p-phenylene diamine (PDA) polyimide/poly(vinylsilsesquioxane) hybrid nanocomposite films

Wahab, Mohammad A., Kim, Il and Ha, Chang-Sik (2004) Microstructure and properties of 3,3 ',4,4 '-biphenyltetracarboxylic dianhydride (BPDA)-p-phenylene diamine (PDA) polyimide/poly(vinylsilsesquioxane) hybrid nanocomposite films. Journal of Polymer Science Part A-Polymer Chemistry, 42 20: 5189-5199. doi:10.1002/pola.20312


Author Wahab, Mohammad A.
Kim, Il
Ha, Chang-Sik
Title Microstructure and properties of 3,3 ',4,4 '-biphenyltetracarboxylic dianhydride (BPDA)-p-phenylene diamine (PDA) polyimide/poly(vinylsilsesquioxane) hybrid nanocomposite films
Journal name Journal of Polymer Science Part A-Polymer Chemistry   Check publisher's open access policy
ISSN 0887-624X
1099-0518
Publication date 2004-10
Sub-type Article (original research)
DOI 10.1002/pola.20312
Volume 42
Issue 20
Start page 5189
End page 5199
Total pages 11
Place of publication Hoboken, NJ, United States
Publisher John Wiley & Sons
Language eng
Abstract Hybrid nanocomposite films of poly(vinylsilsesquioxane) (PVSSQ) and polyimide (PI) (PI/PVSSQ) were prepared via sol-gel process from triethoxyvinylsilane (VSSQ) and thermal imidization from 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA)-p-phenylene diamine (PDA) polyamic acid (BPDA-PDA PAA). We investigated the microstructure; interfacial interaction; and optical, thermal, dielectric, and mechanical properties of the hybrid films. The phase morphologies and degree of surface roughness were evaluated by scanning electron microscope (SEM) and atomic force microscope (AFM), respectively. It was found that the surface topography was influenced by the composition of PVSSQ. Hydrogen bonding interactions between polyimide (PI) matrix and PVSSQ domains were proved with FT-IR spectroscopy. The transparency of the hybrid films was found to be dependent on the PVSSQ content. Incorporating of the PVSSQ in the hybrid composites increased the glass transition temperature of PI. Dielectric constants of the hybrid films were in the range of 2.37–3.59. Properties of the PI films were also significantly enhanced by adding 5–30 wt % of PVSSQ. For comparison, we also prepared the hybrid composites of PI and mixtures of VSSQ and tetraethoxysilane (TEOS) and the PI/silica hybrid composite containing 30 wt % of silica obtained from TEOS.
Keyword Dielectric constant
Polyimide
Hybrid
Nanocomposites
Silsesquioxane
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
 
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