PMID- 16010945
OWN - NLM
STAT- MEDLINE
DCOM- 20050908
LR  - 20191210
IS  - 1533-4880 (Print)
IS  - 1533-4880 (Linking)
VI  - 5
IP  - 5
DP  - 2005 May
TI  - In-situ synthesis and performance of titanium oxide/poly(methyl methacrylate) 
      nanocomposites.
PG  - 814-9
AB  - Polymer nanocomposites have elicited extensive research efforts due to their 
      potential to exhibit spectacular properties. They have immense potential and are 
      befitting materials to serve as an ideal and futuristic alternative for varied 
      applications. Poly(methyl methacrylate) (PMMA) and titanium oxide (TiO2) 
      nanocomposites used in this study were fabricated by an in-situ free radical 
      polymerization process. Three point bend tests were conducted with a modified 
      universal microtribometer to evaluate fracture toughness. The results indicated 
      that the stress intensity values increase as the concentration of titanium oxide 
      increases up to 1 vol% and subsequently decrease at higher concentrations. 
      Scanning electron microscopy (SEM) images of fracture surfaces afforded clues as 
      to the possible deformation mechanism. Ultraviolet-visible spectroscopy (UV-vis) 
      evaluated the degree of transparency of the nanocomposites. It was observed that 
      samples became opaque as the concentration was increased beyond 0.01% volume 
      fraction. X-ray diffraction characterized the TiO2 crystalline phase and 
      Scherrer's equation was used to calculate the crystallite size. Among the 
      concentrations considered the 3% volume fraction sample had the largest 
      crystallite size. Finally, microhardness measurements further characterized the 
      mechanical properties of the composites.
FAU - Bandugula, Uttam C
AU  - Bandugula UC
AD  - Nanomaterials and Nanomanufacturing Research Center, Department of Mechanical 
      Engineering, University of South Florida, Tampa, Florida 33620, USA.
FAU - Clayton, L M
AU  - Clayton LM
FAU - Harmon, J P
AU  - Harmon JP
FAU - Kumar, Ashok
AU  - Kumar A
LA  - eng
PT  - Evaluation Study
PT  - Journal Article
PT  - Research Support, U.S. Gov't, Non-P.H.S.
PL  - United States
TA  - J Nanosci Nanotechnol
JT  - Journal of nanoscience and nanotechnology
JID - 101088195
RN  - 15FIX9V2JP (titanium dioxide)
RN  - 9011-14-7 (Polymethyl Methacrylate)
RN  - D1JT611TNE (Titanium)
SB  - IM
MH  - Crystallization/*methods
MH  - Elasticity
MH  - Hardness
MH  - Materials Testing
MH  - Molecular Conformation
MH  - Nanostructures/analysis/*chemistry/*ultrastructure
MH  - Nanotechnology/*methods
MH  - Polymethyl Methacrylate/analysis/*chemistry
MH  - Surface Properties
MH  - Tensile Strength
MH  - Titanium/analysis/*chemistry
EDAT- 2005/07/14 09:00
MHDA- 2005/09/09 09:00
CRDT- 2005/07/14 09:00
PHST- 2005/07/14 09:00 [pubmed]
PHST- 2005/09/09 09:00 [medline]
PHST- 2005/07/14 09:00 [entrez]
AID - 10.1166/jnn.2005.088 [doi]
PST - ppublish
SO  - J Nanosci Nanotechnol. 2005 May;5(5):814-9. doi: 10.1166/jnn.2005.088.