Conformation crystalline

The infoiination obtained from an application of IR spectroscopy to a surface investigation includes the molecular structure, orientation, chemical reaction, conformation, crystallinity, and so on. 

Parallel studies on PAMAM dendrimers, the Frechet type polyether den-drons, and other dendrimer families have generated an extensive list of unique properties driven by the dendritic state/ Figure 1.18 compares several significant physical property differences between the linear and dendritic topologies related to conformations, crystallinity, solubilities, intrinsic viscosities, entanglement, diffusion/mobility and electronic conductivity. 

Le Bail, P., Rondeau, C. and Bul6on, A. (2005) Structural investigation of amylose complexes with small ligands helical conformation, crystalline structure and thermostability. Internationl Journal of Biological Macromolecules, 35, 1-7. 

FT-IR is a powerful and reliable technique for description of chemical characterization of graphene and also study of the structure and properties relationships in PVDF/PMMA/graphene polymer blend nanocomposite. The interactions between these three components including PVDF, PMMA and graphene sheets can be revealed and described by using this technique. As well, exploration of PVDF chains conformations (crystalline structures) are affected by presence of graphene sheets and PMMA chains can be done which is very important in order to design the new material with special properties. 

Quantification requires knowledge of the beam path through the sample. Hence, the sample often needs to be modified to allow for a known geometry. Spectral subtraction, least square regression analysis, PLS and spectral deconvolution are some of the spectroscopic techniques widely used to quantify constituents in a multicomponent sample. For almost any type of spectroscopic analysis, this is usually the first step. It is especially important for polymers given the variations in spectra for the same polymer due to molecular weight, conformation, crystallinity, sample preparation, age and sampling method. 

No. 10, 6th May 1996, p.3515-20 RAMAN VIBRATIONAL STUDIES OF SYNDIOTACTIC POLYSTYRENE. 1. ASSIGNMENTS IN A CONFORMATIONAL/ CRYSTALLINITY SENSITIVE SPECTRAL REGION... 

Due to the reasons discussed earlier, the NIR spectrum may contain information on the following set of process parameters composition of complex chemical solutions, molecular configuration and conformation, crystallinity of solid (polymer) samples, anisotropy (from polarization measurements), size and shape of heterogeneous domains. 

Commercial ETFE is an equimolar copolymer of ethylene and tetrafluoroethylene (1 1 ratio) and is isomeric with polyvinylidene fluoride. ETFE has a higher melting point than PVDF and a lower dissipation fac-torl l because of its special chain conformation. Crystalline density was 1.9 g/cm for a polymer containing 12% head-to-head defect, The unit cell of the crystal is expected to be orthorhombic or monoclinic with cell dimensions of a = 0.96 nm, b = 0.925 nm, c = 0.50 nm and 7= 96°. 

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