Light Scattering from Multicomponent Polymer Systems in Shear Fields: Real-time, In Situ Studies of Dissipative Structures in Open Nonequilibrium Systems

2012 ◽  
Keyword(s):  
Light Scattering ◽  
Real Time ◽  
Dissipative Structures ◽  
Nonequilibrium Systems ◽  
Polymer Systems ◽  
In Situ Studies ◽  
Multicomponent Polymer ◽  
Shear Fields

In situ real‐time study of chemical etching process of Si(100) using light scattering

1996 ◽  
Vol 69 (2) ◽  
pp. 221-223 ◽  
Author(s):  
Y.‐P. Zhao ◽  
Y.‐J. Wu ◽  
H.‐N. Yang ◽  
G.‐C. Wang ◽  
T.‐M. Lu
Keyword(s):  
Light Scattering ◽  
Real Time ◽  
Chemical Etching ◽  
Etching Process ◽  
Time Study

scholarly journals EXPRESS: Visualization of Inter- and Intramolecular Interactions in Poly(3-hydroxybutyrate)/Poly(L-lactic acid) (PHB/PLLA) Blends During Isothermal Melt Crystallization Using Attenuated Reflection Fourier Transform infrared (ATR FT-IR) Spectroscopic Imaging

2021 ◽  
pp. 000370282110102
Author(s):  
Huiqiang Lu ◽  
Harumi Sato ◽  
Sergei G Kazarian
Keyword(s):  
Spatial Distribution ◽  
Intermolecular Interactions ◽  
Spectral Band ◽  
Spectroscopic Imaging ◽  
Peak Position ◽  
Intramolecular Interactions ◽  
Melt Crystallization ◽  
Polymer Systems ◽  
Multicomponent Polymer

Inter- and intramolecular interactions in multicomponent polymer systems influence their physical and chemical properties significantly and thus have implications on their synthesis and processing. In the present study, chemical images were obtained by plotting the peak position of a spectral band from the datasets generated by in-situ ATR-FTIR spectroscopic imaging. This approach was successfully used to visualize changes in intra- and intermolecular interactions in Poly(3-hydroxybutyrate)/Poly(L-lactic acid) (PHB/PLLA) blends during the isothermal melt crystallization. The peak position of ν (C=O) band, which reflects the nature of the intermolecular interaction, shows that the intermolecular interactions between PHB and PLLA in the miscible state (1733 cm-1) changes to the inter- and intramolecular interaction (CH3∙∙∙O=C, 1720 cm-1) within PHB crystal during the isothermal melt crystallization. Compared with spectroscopic images obtained by plotting the distribution of absorbance of spectral bands, which reveals the spatial distribution of blend components, the approach of plotting the peak position of a spectral band reflects the spatial distribution of different intra- and intermolecular interactions. With the process of isothermal melt-crystallization, the disappearance of the intermolecular interaction between PHB and PLLA and the appearance of the inter- and intramolecular interactions within the PHB crystal were both visualized through the images based on the observation of the band position. This work shows the potential of using in-situ ATR-FTIR spectroscopic imaging to visualize different types of inter- or intramolecular interactions between polymer molecules or between polymer and other additives in various types of multicomponent polymer systems.  

scholarly journals Real-time evaluation of thin film drying kinetics using an advanced, multi-probe optical setup

2016 ◽  
Vol 4 (11) ◽  
pp. 2178-2186 ◽  
Author(s):  
Nusret S. Güldal ◽  
Thaer Kassar ◽  
Marvin Berlinghof ◽  
Tayebeh Ameri ◽  
Andres Osvet ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Light Scattering ◽  
Real Time ◽  
White Light ◽  
Bulk Heterojunction ◽  
Optical Setup ◽  
Time Evaluation ◽  
Drying Chamber

A portable in situ drying chamber, equipped with white light reflectometry, photoluminescence and light scattering, is used to fully characterize the thermodynamic and kinetic changes of P3HT- and DPP-TT-T-based organic bulk-heterojunction thin films during drying.

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