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- W1992074083 abstract "Abstract Quantitative analysis of the components of rubber vulcanizates is a difficult, yet very important, process in industrial polymer chemistry. Infrared (IR) and nuclear magnetic resonance (NMR) spectroscopy are the techniques most often used. These methods generally involve time consuming pretreatment steps, but in favorable cases these methods yield results with 1–5% accuracy. In a preliminary study, we acquired Curie-point pyrolysis-mass spectra for several uncured rubber blends as well as some compounded vulcanizates. Qualitative examination of the data indicated the potential for the derivation of quantitative data from the spectra. Now we have examined a series of rubber triblend samples by pyrolysis-mass spectrometry (Py-MS) to assess the quantitative aspects. The three components were styrene-butadiene rubber (SBR), cis-polybutadiene rubber (BR), and natural (polyisoprene) rubber (NR). The blends were analyzed in triplicate or quadruplicate by Curie-point Py-MS from toluene suspensions of samples obtained by prolonged grinding under liquid nitrogen. The spectra were normalized with the NORMA program and subsequently analyzed by target rotation factor analysis using the SPSS program. Finally, response factors were calculated for each of the components, and these were used to predict the concentrations of the individual rubber components in various training or test sets of data. The response factors were found to be relatively constant for each of the blends, indicating that interactions between components were minimal. The average errors for the three components were in the 2–5% range. The error for BR was slightly larger since the butadiene monomer is common to both SBR and BR. The results demonstrate the feasibility of the Py-MS approach to polymer blend analysis. The results are comparable in accuracy to those obtained by IR and NMR spectroscopy." @default.
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- W1992074083 date "1985-04-01" @default.
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- W1992074083 title "Quantitative analysis of rubber triblends by pyrolysis-mass spectrometry" @default.
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- W1992074083 doi "https://doi.org/10.1016/0165-2370(85)80018-8" @default.
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