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SYNTHESIS AND PROPERTIES OF THERMOSENSITIVE AMPHIPHILIC COMPOLYMER HPAM-g-P(NIPA-co-DMAM-co-C12AM)
Ort / Verlag
ProQuest Dissertations & Theses
Erscheinungsjahr
2008
Link zum Volltext
Quelle
ProQuest Dissertations & Theses A&I
Beschreibungen/Notizen
The graft copolymers HPAM-g-P(NIPA-co-DMAM-co-C12AM) with different side chain composition and molecular mass were synthesized by macromonomer method. Firstly, amino-end P(NIPA-co-DMAM-co-C12AM) was prepared by copolymerization of N-dodecylacrylamide(C12AM), N-isopropylacrylamide (NIPA) and N,N-dimethylacrylamide(DMAM) by using 2-aminoethanethiol hydrochloride as chain transfer agent and then macromonomers P(NIPA-co-DMAM-co-C12AM) with acrylamido-end group were obtained by reacting with acryloyl chloride; Secondly, macromonomers were copolymerized with acrylamide and then hydrolysized under base condition. The compositions of the side chain and graft copolymers were characterized by 1H-NMR. The cloud point temperatures of side chain polymers were studied as a function of composition, concentration and added salt concentration. The rheological characters of the graft copolymers were studied by RS600 Rheometer under different temperature, shear rate, polymer and salt concentrations. The results show that the gr