A study of the adsorption of block copolymers with respect to such variables as adsorption rate, concentration, molecular weight, relative block sizes, architecture, adsorption solvent, and temperature was conducted for the adsorption block copolymers to silanol surfaces. Poly(styrene-b-isoprene) and poly(styrene-b-1,2-butadiene) with precise molecular weight and narrow polydispersity were synthesized by anionic polymerization techniques. These block copolymers were then specifically modified to incorporate an organic moiety (sticky foot) which would promote adsorption. Hydrosilylation to incorporate trimethoxysilanes into the diene block was unsuccessful due to low reaction yields and crosslinking. Hydroboration/oxidation to incorporate alcohols into the diene block was used to prepare polymers for adsorption studies due to the high reaction yields with no crosslinking. Adsorption studies examining the effects of molecular weight, number of adsorbing segments, time, concentration, polymer architecture, and adsorption solvent were conducted for the adsorption to aerosil 130. Adsorptions were analyzed by UV spectroscopy and thermal gravimetric analysis. Adsorption studies examining the effects of molecular weight, relative block sizes, and temperature were conducted for the adsorption to glass slides. Adsorptions were analyzed by water contact angle and X-ray photoelectron spectroscopy. The competitive polymer adsorptions between two different polymers adsorbing to aerosil 130 were studied. Simultaneous adsorptions for two polymers with respect to concentration were examined for three separate sets of polymers. The polymers were adsorbed to aerosil 130 and analyzed by gel permeation chromatography. Sequential competitive adsorptions for these same polymer sets were also conducted using the same substrate and analysis technique. The effect of surface affinity on polymer adsorption was examined by adsorbing one polymer sample to a series of different surfaces. Poly(chlorotrifluoroethylene) polymers with carboxylic acid, alcohol, amine, and ethyl ester surfaces as well as glass slide and aminated glass slide surfaces were prepared and used for adsorptions. These adsorptions were analyzed by X-ray photoelectron spectroscopy.
| Identifer | oai:union.ndltd.org:UMASS/oai:scholarworks.umass.edu:dissertations-9007 |
| Date | 01 January 1994 |
| Creators | Kendall, Eric Warren |
| Publisher | ScholarWorks@UMass Amherst |
| Source Sets | University of Massachusetts, Amherst |
| Language | English |
| Detected Language | English |
| Type | text |
| Source | Doctoral Dissertations Available from Proquest |
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