2002年4月1日 · A method to estimate the degree of crystallinity in isotactic polypropylene has been developed. The method is based on integrated intensities of the Raman bands at 808 and 841 cm −1. From the observation of correlation splitting, Raman bands related to different conformational states were identified.

2018年11月10日 · FTIR spectroscopy, Raman spectroscopy and wide-angle X-ray scattering are utilised for the detailed study of the neat PP, neat COC and PP/COC blends. FTIR and Raman spectra are widely useful to study PP/COC blends, since the physical properties of blends are affected by the structures of molecular chains.

1999年1月1日 · Infrared (IR) and Raman spectroscopy probe the vibrational spectrum by absorption and inelastic scattering, respectively. In many cases these two techniques are complementary. For a...

2022年5月8日 · Raman spectroscopy is a characterization technique that detects bond vibrations that change the polarizability of the molecule. It is therefore a non-destructive technique and is suitable for examining both polymers and their additives.

Stable coated polypropylene (PP) surgical suture with spherical AgNPs (PP/Ag nanocomposite) was prepared using an optimized aqueous dipping method. Homogenous and linear distribution of AgNPs...

2000年1月1日 · The Raman spectral mapping of photo-oxidised polypropylene that was performed demonstrated that oxidation was heterogeneous at a microscopic scale. Furthermore, catalyst residues were detected and their distribution …

The present study is aimed at investigating the molecular structure, crystallinity, and morphology of polyethylene (PE) and polypropylene (PP) blends by using Raman mapping, scanning electron...

1995年11月16日 · Measurements of the relative band intensity changes with orientation can be made in the FT Raman spectrometer on a wide range of isotactic polypropylene specimens. The usefulness of these changes in estimating orientation at the sampled point is considered.

Infrared (IR) and Raman spectroscopy probe the vibrational spectrum by absorption and inelastic scattering, respectively. In many cases these two techniques are complementary. For a noncentrosymmetric molecule, such as isotactic PP (iPP) in a 3 1 helix, bands which are strong with one technique are often weak with the other.

2022年11月5日 · In this paper, we demonstrate a systematic comparison of IR (FTIR and O-PTIR) and Raman spectra (collected via simultaneous O-PTIR + Raman and standalone Raman) and their reliability as the...