Premium
Various‐sized stearyl poly(ethylene oxide) coupling‐polymer blending poly(ether urethane) material for surface study and biomedical applications
Author(s) -
Wang Dongan,
Ji Jian,
Feng Linxian
Publication year - 2000
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20000901)201:14<1574::aid-macp1574>3.0.co;2-b
Subject(s) - ethylene oxide , polymer chemistry , contact angle , materials science , polymer , ethylene glycol , polymerization , monomer , chemical engineering , ether , oxide , copolymer , chemistry , organic chemistry , composite material , engineering , metallurgy
Three types of stearyl poly(ethylene oxide) (SPEO) with different values of M n , 2 300, 6 000 and 12 000, were synthesized by an anion polymerization from the ethylene oxide (EO) monomer with the initiator, sodium salt of stearyl alcohol. Consequently the amphiphilic coupling polymers of 4,4′‐diphenylmethane diisocyanate (MDI)‐SPEO (SPEO‐MDI‐SPEO, MSPEO 2 300, 6 000 and 12 000) were synthesized and the blended poly(ether urethane) samples of PEL‐MSPEOs (PEL‐MSPEO 2 300, 6 000 and 12 000) were prepared via a solution process. The surface analysis with ATR‐FTIR, angle‐dependent XPS and two methods of contact angle measurements (sessile drop and captive bubble) were performed. The results of the analysis indicate that the dominant factor for the monoblock behavior of long‐chained MSPEO 12 000 is the PEO chain. However, for short‐chained MSPEO the factor is C 18 and the dominant effect is not so overwhelming compared to that of PEO for long‐chained MSPEO. Simultaneously, the size of the molecule will also dramatically affect MSPEOs' kinetic behavior including the monoblock mobility and the reconstructing of the surface conformation, i. e. the smaller the size, the faster the movement. The static test of clotting time, PRT, was also performed. The results indicated that the modified surface could resist the clotting much more effectively than that of the untreated surface.