TY - JOUR
T1 - Microstructure of alkoxy and alkyl substituted isocyanate copolymers determined by desorption chemical ionization mass spectrometry
AU - Chen, Guodong
AU - Cooks, R. Graham
AU - Jha, Salil K.
AU - Green, Mark M.
N1 - Funding Information:
The work at Purdue University was supported by the U.S. Department of Energy, Office of Basic Energy Sciences and by the National Science Foundation (CHE 92-23791) and at the Polytechnic University by the Chemistry and Materials Division of the National Science Foundation and by the Office of Naval Research.
PY - 1997/12/10
Y1 - 1997/12/10
N2 - Copolymers comprised of 3-(2-(2-methoxy)ethoxy)propyl isocyanate (monomer G) with 1-isocyanato-4,4,5,5,6,6,7,7,8,8,9,9,9-tridecafluorononane (monomer F) as well as copolymers of monomer G and n-hexylisocyanate (monomer H) were examined by desorption chemical ionization mass spectrometry (DCI-MS) to obtain information on the monomer distributions in the copolymers. The monomer distributions were deduced from the abundances of various protonated and ammoniated trimers in the ammonia DCI mass spectra using zero-order Markovian statistics. Both copolymers comprised of monomers G and F as well as monomers G and H were found to have random monomer distributions. This behavior is in contrast to copolymers comprised of monomers F and H whose dissimilar side chains resulted in non-random distributions.
AB - Copolymers comprised of 3-(2-(2-methoxy)ethoxy)propyl isocyanate (monomer G) with 1-isocyanato-4,4,5,5,6,6,7,7,8,8,9,9,9-tridecafluorononane (monomer F) as well as copolymers of monomer G and n-hexylisocyanate (monomer H) were examined by desorption chemical ionization mass spectrometry (DCI-MS) to obtain information on the monomer distributions in the copolymers. The monomer distributions were deduced from the abundances of various protonated and ammoniated trimers in the ammonia DCI mass spectra using zero-order Markovian statistics. Both copolymers comprised of monomers G and F as well as monomers G and H were found to have random monomer distributions. This behavior is in contrast to copolymers comprised of monomers F and H whose dissimilar side chains resulted in non-random distributions.
KW - Desorption chemical ionization
KW - Mass spectrometry
KW - Polymer analysis
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U2 - 10.1016/S0003-2670(97)00504-7
DO - 10.1016/S0003-2670(97)00504-7
M3 - Article
AN - SCOPUS:0031578859
SN - 0003-2670
VL - 356
SP - 149
EP - 154
JO - Analytica Chimica Acta
JF - Analytica Chimica Acta
IS - 2-3
ER -