Polymer paperIsotacticity determination of polypropylene using FT-Raman spectroscopy
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2019, Surfaces and InterfacesCitation Excerpt :It is noticed that the increase in the concentration of nanofiller broadens these lines and decreases their amplitude. The most intense line observed within this spectral range is located at 400 cm−1 and assigned to the polymeric matrix (CH2 wagging and CH vibrations) [15–17]. As noticed from the left panel of Fig. 3, the position of this line (for the pristine polymer) is displaced towards smaller wavenumbers as the integral dose is increased.
Morphological Raman analysis of short chain branched ethylene and propylene metallocenic copolymers
2018, Polymer TestingCitation Excerpt :Raman spectroscopy is a fast and nondestructive method to probe the conformational states of the polymer chains. Thus, differentiation in the vibrational spectrum of chains in crystals with unique conformations must be expected [1,2,20–30,33–46]. Contents of different configurational and conformational states, order and length distribution of sequences can be potentially identified and related to chains in specific ‘phases’ [37–39].
Evaluation of the temperature and molecular weight dependent migration of di(2-ethylhexyl) phthalate from isotactic polypropylene composites
2017, Reactive and Functional PolymersCitation Excerpt :In the second region, the peaks at 1376 cm− 1 and 1455 cm− 1 were attributed to the CH2 and CH3 deformation vibrations of the aliphatic group in the polymer chains [12]. The CH3 symmetric bending vibration peak was identified at around 1160 cm− 1, which can vary based on the molecular size and three-dimensional structure of PP [13]. The additional carbonyl stretching vibration at 1747 cm− 1, in the third region, was attributed to DEHP [14].
Effect of substrate temperature on the splat formation of flame sprayed polypropylene
2011, Surface and Coatings TechnologyCitation Excerpt :Micro-Raman scattering experiments were performed using an inVia Raman spectrometer (Renishaw plc, UK). Vibrational modes of the micro-Raman effect arise from inelastic photon scattering [38]. Analyses were conducted with an excitation wavelength of 532 nm at a spectral resolution of 1 cm− 1 within the range of 200 to 3200 cm− 1.