Micro-FTIR Study of Molecular Orientation at Crack Tip in Nylon 6/Clay Nanocomposite: Insight into Fracture Mechanism

2009 ◽  
Vol 113 (29) ◽  
pp. 9664-9668 ◽  
Author(s):  
Wenfei Xu ◽  
Ruihua Lv ◽  
Bing Na ◽  
Nana Tian ◽  
Zhujun Li ◽  
...  
Keyword(s):  
Fracture Mechanism ◽  
Molecular Orientation ◽  
Crack Tip ◽  
Nylon 6 ◽  
Ftir Study ◽  
Insight Into

scholarly journals Infrared vibrational nanocrystallography and nanoimaging

2016 ◽  
Vol 2 (10) ◽  
pp. e1601006 ◽  
Author(s):  
Eric A. Muller ◽  
Benjamin Pollard ◽  
Hans A. Bechtel ◽  
Peter van Blerkom ◽  
Markus B. Raschke
Keyword(s):  
Ion Mobility ◽  
Molecular Orientation ◽  
Hybrid Imaging ◽  
Defect Formation ◽  
Near Field ◽  
Molecular Solids ◽  
Optical Antenna ◽  
Molecular Bond ◽  
Low Symmetry ◽  
Insight Into

Molecular solids and polymers can form low-symmetry crystal structures that exhibit anisotropic electron and ion mobility in engineered devices or biological systems. The distribution of molecular orientation and disorder then controls the macroscopic material response, yet it is difficult to image with conventional techniques on the nanoscale. We demonstrated a new form of optical nanocrystallography that combines scattering-type scanning near-field optical microscopy with both optical antenna and tip-selective infrared vibrational spectroscopy. From the symmetry-selective probing of molecular bond orientation with nanometer spatial resolution, we determined crystalline phases and orientation in aggregates and films of the organic electronic material perylenetetracarboxylic dianhydride. Mapping disorder within and between individual nanoscale domains, the correlative hybrid imaging of nanoscale heterogeneity provides insight into defect formation and propagation during growth in functional molecular solids.

A polarised μ-FTIR study on a model system for nylon 6 6: implications for the nylon Brill structure

Polymer ◽  
2001 ◽  
Vol 42 (26) ◽  
pp. 10119-10132 ◽  
Author(s):  
Sharon J. Cooper ◽  
Mike Coogan ◽  
Neil Everall ◽  
Ian Priestnall
Keyword(s):  
Nylon 6 ◽  
Model System ◽  
Ftir Study

Molecular Orientation and Crystalline Structure of Aligned Electrospun Nylon 6 Nanofibers: Effect of Gap Size

2011 ◽  
Vol 175-176 ◽  
pp. 333-336
Author(s):  
Naotaka Kimura ◽  
Jong Chul Park ◽  
Byoung Suhk Kim ◽  
Ick Soo Kim
Keyword(s):  
Crystalline Structure ◽  
Molecular Orientation ◽  
Nylon 6 ◽  
Polymer Chains ◽  
Fiber Axis ◽  
Fiber Direction ◽  
Gap Size ◽  
Metal Plates ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

We studied the effect of gap size on molecular orientation and crystalline structure of theuniaxially well-aligned nylon 6 nanofibers produced in the gap of the negatively charged metal plates. As evidenced by polarized FT-IR spectroscopy, relative intensity in several absorbance bands, including the N-H stretching, amide I, II, and III vibrations were found to be different in the parallel and perpendicular polarized FT-IR spectra. Moreover, X-ray analysis indicated that the metastable γ-form was predominant in the as-spun nylon 6 nanofiber, and was transformed into the thermodynamically stable α-form by increasing the cap size. These results suggested that the polymer chains were oriented perpendicular to the fiber direction. Molecular orientation to the fiber axis was enhanced as increasing the gap size.

New insight into the flocculation behavior of hydrophilic silica in styrene butadiene rubber composites

RSC Advances ◽  
2015 ◽  
Vol 5 (111) ◽  
pp. 91262-91272 ◽  
Author(s):  
Juqiao Su ◽  
Qi Yang ◽  
Dahang Tang ◽  
Yajiang Huang ◽  
Zhongguo Zhao ◽  
...  
Keyword(s):  
Crack Growth ◽  
Crack Tip ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Rubber Composites ◽  
Modified Silica ◽  
Filled Rubber ◽  
Styrene Butadiene ◽  
Insight Into

We propose that modified silica filled rubber composites with moderate silica flocculation possesses preferable resistance to crack growth by the crack tip deflection mechanism.

Molecular Orientation and Crystalline Structure of Aligned Electrospun Nylon-6 Nanofibers: Effect of Gap Size

2010 ◽  
Vol 295 (12) ◽  
pp. 1090-1096 ◽  
Author(s):  
Naotaka Kimura ◽  
Han-Ki Kim ◽  
Byoung-Suhk Kim ◽  
Keun-Hyung Lee ◽  
Ick-Soo Kim
Keyword(s):  
Crystalline Structure ◽  
Molecular Orientation ◽  
Nylon 6 ◽  
Gap Size
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