Spectra polymerized onto

Figure 10. Carbon Is spectrum from hexafluoroethane plasma polymerized onto polystyrene.

Figure lib. Carbon 7s spectrum of tetrafluoroethylene plasma polymerized onto wool. (Reproduced, with permission, from Ref. 42. Copyright 1976, Dekker.)... 

The possibility that the chromophores of structures I, II and III might be distinguishable by their visible-ultraviolet spectra was examined. As shown in Figure 2, the spectrum of a polybutadiyne thin film, obtained by vapor deposition polymerization onto a quartz cell, is a nearly featureless continuum from 800 to 190 nm. This suggests that neither structure predominates and is in general agreement with a polydispersity as indicated by the breath of the infrared spectrum s aromatic bands. 

The XPS survey spectrum of a 75 nm thick film of plasma polymerized acetylene that was deposited onto a polished steel substrate is shown in Fig. 18 [22]. This film consisted mostly of carbon and a small amount of oxygen. Thus, the main peaks in the spectrum were attributed to C(ls) electrons near 284.6 eV and 0(ls) electrons near 533.2 eV. Additional weak peaks due to X-ray-induced O(KVV) and C(KLL) Auger electrons were also observed. High-resolution C(ls) and 0(ls) spectra are shown in Fig. 19. The C(ls) peak was highly symmetric. 

Fig. 18. XPS survey spectrum of a plasma-polymerized acetylene film with a thickness of 75 nm that was deposited onto a polished steel substrate. Reproduced by ptermission of John Wiley and Sons from Ref. [22].

As an example, both monofunctional and multifunctional polymeric mercapto-esters were deposited onto optically smooth silicon wafers coated with vapor-deposited copper. The copper had been oxidized to Cu20, as verified by XPS. Infrared reflectance (RAIRS) at 81° (4 cm-1 resolution, 2000 scans) using an MCT detector yielded information on both the nature and the durability of the mercaptoester bond to the metal oxide film. A 16 cm l shift (1740— 1724 cm-1) was observed in the carbonyl absorption of stearyl thioglycolate (STG) deposited onto the Cu20 mirror. The absorption spectrum of the carbonyl region is illustrated in Fig. 11, both for the pure STG and the reacted monolayer. 

Poorer complexing ability of a surface site compared with polymer can account for the observed induction periods. There is evidence for an attraction between monomer and polymer. The infrared spectrum of a polymer film was obtained by polymerizing C3O2 onto the NaCl windows of a 100 mm gas cell at room temperature followed by pumping the monomer from the cell once sufficient polymer had formed. The most intense band of the monomer at 4.46p which is well resolved from the polymer s 4.6y ketenyl band, required 30 minutes of pumping with a mechanical pump to remove. This mechanism can accommodate the observed first order rate dependencies on monomer and polymer if it is assumed that either the complexation step of polymer with monomer is rate limiting, or alternatively, in the presence of excess monomer where essentially all of the polymer molecules are... 

For most textile uses, a DS <1 is desirable. Cyanoethylation can impart a wide variety of properties to the cotton fabric, such as rot resistance, heat and acid resistance, and receptivity to acid and acetate dyes. Acrylonitrile and acrylonitrile polymers (qv) has also been radiation-pol5unerized onto cotton with a °Co source. Microscopical examination of ultrathin sections of the product shows that the location of the polymer is within the fiber (120). Examination of the ir spectrum of cotton-containing polymerized acrylonitrile indicates that grafliing occurs at the hydroxyl site of the cellulose (121). Another monomer grafted onto cellulose by irradiation is styrene polymers (qv). Chemical properties, mechanisms, and textile properties of these grafted poisoners of cellulose have been summarized... 

Assuming that the nanocomposites obtained can be considered as oscillators transferring their oscillations onto the medium molecules, we can determine to what extent the IR spectrum of liquid medium will change, for example, polyethylene polyamine applied as a hardener in some polymeric compositions, when we introduce small and supersmall quantities of nanocomposite into it. 

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