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Characterization of mesogen‐jacketed liquid crystalline polymers by matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry
Author(s) -
He Meiyu,
He Jiangtao,
Mi Qiding,
Zhou Qifeng
Publication year - 2000
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/1097-0231(20001015)14:19<1806::aid-rcm97>3.0.co;2-6
Subject(s) - dispersity , chemistry , mass spectrometry , polymer , sample preparation , mesogen , analytical chemistry (journal) , desorption , matrix assisted laser desorption/ionization , matrix (chemical analysis) , chromatography , polymer chemistry , organic chemistry , adsorption , liquid crystalline
For synthetic polymers, a proper sample preparation method is essential for successful characterization by matrix‐assisted laser desorption/ionization time‐of‐flight (MALDI‐TOF) mass spectrometry. In this work, six synthetic mesogen‐jacketed liquid crystalline polymers (MJLCPs) with different main‐chain, spacer and mesogenic units were investigated by MALDI‐TOF mass spectrometry. Several factors that affect the analysis of these polymers were examined. These factors include matrices used, cationization salts used, the concentration of polymers, and the ratio of sample to matrix. After testing different conditions, we found a suitable sample preparation method for these six polymers. The number average molecular weight (M n ), weight average molecular weight (M w ) and polydispersity (PD) were calculated using data obtained in the linear mode. The end groups of the polymers were proposed using data obtained in reflectron mode. Copyright © 2000 John Wiley & Sons, Ltd.