scholarly journals Polymer Characterization

2021 ◽  
pp. 89-121
Author(s):  
Christopher Taudt
Keyword(s):  
Refractive Index ◽  
Spatial Distribution ◽  
Polymeric Material ◽  
Cross Linking ◽  
Lorenz Equation ◽  
Polymer Characterization ◽  
Link Type ◽  
Micro Optics ◽  
The Cross

AbstractAs discussed in section 10.1007/978-3-658-35926-3_2, the characterization of cross-linking and especially its spatial distribution is crucial for the fabrication of micro optics, MEMS, and semiconductors. Some studies have found that the measurement of the refractive index over the cross-linking process can be used as an indicator for the degree of cross-linking of a sample. According to Kudo et al., [130], the cross-linking of a polymeric material leads to a densification which can be directly related to an increase in refractive index using the Lorentz-Lorenz equation.

scholarly journals Characterization of the Cross-Linking Nylon-6,6 Blended Reactive Types of Flame Retardants with .GAMMA.-Ray Irradiation by Solid State NMR

2006 ◽  
Vol 63 (12) ◽  
pp. 799-804 ◽  
Author(s):  
Yuko MIWA ◽  
Hiroyuki ISHIDA ◽  
Toshiyuki KANNO ◽  
Hiromasa YANASE ◽  
Kiyotaka SHIGEHARA
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Flame Retardants ◽  
Gamma Ray ◽  
Cross Linking ◽  
Nylon 6,6 ◽  
Gamma Ray Irradiation ◽  
The Cross

Characterization of Thermal Reversible Cross-Linking Agents for Flexible Poly(vinyl chloride)

2014 ◽  
Vol 900 ◽  
pp. 3-6 ◽  
Author(s):  
Jing Wang ◽  
Wei Fang ◽  
Yuan Yuan ◽  
Xiao Ming Liu
Keyword(s):  
Thermal Stability ◽  
Vinyl Chloride ◽  
Congo Red ◽  
Cross Linking ◽  
Gel Content ◽  
Ethyl Mercaptan ◽  
Poly Vinyl Chloride ◽  
The Cross ◽  
Thermal Stability Of

In order to improve thermal stability of Poly (Vinyl Chloride), a kind of thermal reversible cross-linking agents, the end cyclopentadienyl ethanethiol salts, sodium cyclopentadienyl ethyl mercaptan (CPD-C2H4SNa) was synthesized in this paper. The DSC results proved that the prepared CPD-C2H4SNa has obvious thermal reversible characteristics and the thermal reversible temperature was at 177 °C. The effects of cross-linking agent amount, cross-linking reactive time and temperature on flexible PVC compounds were evaluated through gel content testing. It was showed that the cross-linking agent with 3 Phr is optimum for PVC compounds. Moreover, both the cross-linking reactive time and temperature has effects on gel content of PVC compounds. The gel content of CPD-C2H4SNa cross-linked PVC compounds reaches maximum at 76% for 20 min at 160 °C.The static thermal stability of flexible PVC was measured according to congo red method. The results showed that the thermal stability of PVC compounds was enhanced with increasing cross-linking agent amount.

scholarly journals The photoacoustic spectroscopy applied in the characterization of the cross-linking process in polymeric materials

2002 ◽  
Vol 32 (2b) ◽  
pp. 523-530 ◽  
Author(s):  
D. T. Dias ◽  
A. N. Medina ◽  
M. L. Baesso ◽  
A. C. Bento ◽  
M. F. Porto ◽  
...  
Keyword(s):  
Photoacoustic Spectroscopy ◽  
Polymeric Materials ◽  
Cross Linking ◽  
The Cross

scholarly journals Fast Cross-Linking-Characterization of Waveguide-Polymers on Wafers by Imaging Low-Coherence Interferometry

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 1046
Author(s):  
Christopher Taudt ◽  
Bryan Nelsen ◽  
Sandra Schlögl ◽  
Edmund Koch ◽  
Peter Hartmann
Keyword(s):  
Refractive Index ◽  
Cross Linking ◽  
Imaging Spectrometer ◽  
Low Coherence ◽  
Spatially Resolved ◽  
Low Coherence Interferometry ◽  
Novel Method ◽  
Phase Data

This work introduces a novel method to characterize cross-linking differences in spincast polymers for waveguide applications. The method is based on a low-coherence interferometer which utilizes an imaging spectrometer to gather spatially resolved data along a line without the need for scanning. The cross-linking characterization is performed by the determination of the wavelength-dependent optical thickness. In order to do this, an algorithm to analyze the wrapped phase data and extract refractive index information is developed. Finally, the approach is tested on photo-lithographically produced samples with lateral refractive index differences in pitches of 50 μm.

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