Structure and Dynamics of a Colloidal Silica−Poly(methyl methacrylate) Composite by13C and29Si MAS NMR Spectroscopy

1996 ◽  
Vol 29 (4) ◽  
pp. 1305-1312 ◽  
Author(s):  
Roychen Joseph ◽  
Shanmin Zhang ◽  
Warren T. Ford
Keyword(s):  
Nmr Spectroscopy ◽  
Methyl Methacrylate ◽  
Colloidal Silica ◽  
Mas Nmr ◽  
Poly Methyl Methacrylate ◽  
Structure And Dynamics

scholarly journals Introduction of Stilbene Derivatives and Cinnamate Ester Derivatives at the ω-End Groups of Poly(Methyl Methacrylate) Prepared via RAFT Polymerization

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2449
Author(s):  
Martyn Dobinson ◽  
Philip Hodge ◽  
Trevor Wear
Keyword(s):  
Nmr Spectroscopy ◽  
Methyl Methacrylate ◽  
Raft Polymerization ◽  
19F Nmr ◽  
19F Nmr Spectroscopy ◽  
Poly Methyl Methacrylate ◽  
End Groups ◽  
Stilbene Derivatives

The capping of “living” poly(methyl methacrylate) (PMMA) and “living” polystyrene (PS), both prepared by the RAFT technique, with various olefins was screened using 19F-NMR spectroscopy. The capping of “living” PMMA with a labeled stilbene was as high as 63% and with certain cinnamate esters was essentially quantitative, but the capping of “living” polystyrene with all the olefins investigated was generally poor.

End-Group Analysis of Poly(methyl methacrylate) Prepared with Benzoyl Peroxide by 750 MHz High-Resolution1H NMR Spectroscopy

1997 ◽  
Vol 30 (22) ◽  
pp. 6754-6759 ◽  
Author(s):  
Koichi Hatada ◽  
Tatsuki Kitayama ◽  
Koichi Ute ◽  
Yoshio Terawaki ◽  
Takatsune Yanagida
Keyword(s):  
Nmr Spectroscopy ◽  
Methyl Methacrylate ◽  
Benzoyl Peroxide ◽  
Group Analysis ◽  
Poly Methyl Methacrylate ◽  
End Group

Structure and dynamics of starch crosslinked with urea-formaldehyde polymers by carbon-13 CP/MAS NMR spectroscopy

1992 ◽  
Vol 25 (10) ◽  
pp. 2746-2751 ◽  
Author(s):  
Parshuram G. Shukla ◽  
Swaminathan Sivaram ◽  
Baijayantimala Mohanty
Keyword(s):  
Nmr Spectroscopy ◽  
Urea Formaldehyde ◽  
Mas Nmr ◽  
Structure And Dynamics ◽  
Cp Mas Nmr

scholarly journals Preparation of Oleyl Phosphate-Modified TiO2/Poly(methyl methacrylate) Hybrid Thin Films for Investigation of Their Optical Properties

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Masato Fujita ◽  
Naokazu Idota ◽  
Kimihiro Matsukawa ◽  
Yoshiyuki Sugahara
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Methyl Methacrylate ◽  
Rayleigh Scattering ◽  
Volume Fraction ◽  
Mas Nmr ◽  
Ex Situ ◽  
Hybrid Thin Film ◽  
Poly Methyl Methacrylate ◽  
Hybrid Thin Films

TiO2nanoparticles (NPs) modified with oleyl phosphate were synthesized through stable Ti–O–P bonds and were utilized to prepare poly(methyl methacrylate)- (PMMA-) based hybrid thin films via theex situroute for investigation of their optical properties. After surface modification of TiO2NPs with oleyl phosphate, IR and13C CP/MAS NMR spectroscopy showed the presence of oleyl groups. The solid-state31P MAS NMR spectrum of the product revealed that the signal due to oleyl phosphate (OP) shifted upon reaction, indicating formation of covalent Ti–O–P bonds. The modified TiO2NPs could be homogeneously dispersed in toluene, and the median size was 16.1 nm, which is likely to be sufficient to suppress Rayleigh scattering effectively. The TEM images of TiO2/PMMA hybrid thin films also showed a homogeneous dispersion of TiO2NPs, and they exhibited excellent optical transparency even though the TiO2content was 20 vol%. The refractive indices of the OP-modified TiO2/PMMA hybrid thin films changed higher with increases in TiO2volume fraction, and the hybrid thin film with 20 vol% of TiO2showed the highest refractive index (n = 1.86).

scholarly journals Temperature dependent structure and dynamics in smectite interlayers: 23Na MAS NMR spectroscopy of Na-hectorite

RSC Advances ◽  
2019 ◽  
Vol 9 (22) ◽  
pp. 12755-12765 ◽  
Author(s):  
Raju Nanda ◽  
Geoffrey M. Bowers ◽  
Narasimhan Loganathan ◽  
Sarah D. Burton ◽  
R. James Kirkpatrick
Keyword(s):  
Nmr Spectroscopy ◽  
Mas Nmr ◽  
Temperature Dependent ◽  
Dynamical Processes ◽  
Structure And Dynamics ◽  
Hydration State

23Na MAS NMR spectroscopy of the smectite mineral hectorite acquired at temperature from −120 °C to 40 °C shows the presence of complex dynamical processes in the interlayer galleries that depend significantly on their hydration state.

Sign in / Sign up

Export Citation Format

Share Document