Hydrophilic modification of engineering polymers |
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| Affiliation: | 1. Department of Physics, Deogiri College, Aurangabad, 431001 India;2. Department of Physics, Shri Muktanand college, Gangapur, Aurangabad, 431109 India;3. Department of Physics, Shri Shivaji Science College, Amaravati, 444603 India;4. Department of Physics, Vivekanand Arts, Sardar Dalipsingh commerce and science college, Aurangabad 431001 India;5. Department of Physics, Yashvantrao Chavan college of science, Sillod, Aurangabad 431112, India;6. Department of Physics, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad 431001 India;1. Faculty of Science, Universiti Brunei Darussalam, Tungku Link, Gadong, BE 1410, Brunei Darussalam;2. Human Performance Lab, Performance Optimisation Centre, Ministry of Defence, Bolkiah Garrison, BB 3510, Brunei Darussalam;1. College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei 050018, China;2. School of Sciences, Hebei University of Science and Technology, Shijiazhuang 050018, China |
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| Abstract: | Water-soluble carboxylated polymers were synthesized from engineering polymers via the metallation of poly(oxy-1,4-phenylenesulphonyl-1,4-phenyleneoxy-1,4-phenyleneisopropylidene-1, 4-phenylene) and poly(oxy-2,6-dimethyl-1,4-phenylene) with n-butyllithium followed by reaction with carbon dioxide. Interactions between lithium sites on the polymer backbones cause the precipitation of highly metallated polymers. Precipitation of PPO occurs at approximately 15% metallation based on polymer repeat unit. Reproducibility problems are encountered with highly metallated, precipitated polymers. An ester-functional comb-type graft copolymer is synthesized via the anionic polymerization of methyl methacrylate (MMA) from metallated sites on PPO. The ester functionalities can be transesterified with hydroxy functional reagents to yield well-defined comb-type graft terpolymers. Transesterification of oligomeric polyethylene glycol onto PPO-MMA yields a comb-type graft terpolymer with nonionic hydrophiles. |
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