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Design and interfacial activity of c...

Semler, James J.

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Design and interfacial activity of copolymers with controlled monomer sequence distributions.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Design and interfacial activity of copolymers with controlled monomer sequence distributions./
作者:	Semler, James J.
面頁冊數:	156 p.
附註:	Source: Dissertation Abstracts International, Volume: 64-11, Section: B, page: 5645.
Contained By:	Dissertation Abstracts International64-11B.
標題:	Engineering, Chemical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3112806
ISBN:	049660302X

Design and interfacial activity of copolymers with controlled monomer sequence distributions.
Semler, James J.

Design and interfacial activity of copolymers with controlled monomer sequence distributions. - 156 p.

Source: Dissertation Abstracts International, Volume: 64-11, Section: B, page: 5645.

Thesis (Ph.D.)--North Carolina State University, 2004.

We study the bulk and interfacial behavior of A-B copolymers. Emphasis is placed upon addressing the role of the monomer sequence distribution in A-B copolymers on the copolymer's mobility in confined geometries and its ability to recognize chemical patterns on surfaces.

ISBN: 049660302XSubjects--Topical Terms:

1018531
Engineering, Chemical.

Design and interfacial activity of copolymers with controlled monomer sequence distributions.
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100 1 $a Semler, James J. $3 1925715
245 1 0 $a Design and interfacial activity of copolymers with controlled monomer sequence distributions.
300 $a 156 p.
500 $a Source: Dissertation Abstracts International, Volume: 64-11, Section: B, page: 5645.
500 $a Chair: Jan Genzer.
502 $a Thesis (Ph.D.)--North Carolina State University, 2004.
520 $a We study the bulk and interfacial behavior of A-B copolymers. Emphasis is placed upon addressing the role of the monomer sequence distribution in A-B copolymers on the copolymer's mobility in confined geometries and its ability to recognize chemical patterns on surfaces.
520 $a Monte Carlo simulations are used to study the ability of block (A-b-B) and alternating (A-alt-B) copolymers to recognize chemical patterns on flat, impenetrable surfaces comprising two distinct chemical sites, C and D. Our simulations reveal that A-b-B and A-alt-B copolymers are capable of recognizing surface patterns and increasing the B-D attraction enhances the partitioning of A and B segments at the surface. Commensurability between the copolymer's monomer sequence distribution and the size and spatial distribution of the surface heterogeneities affects the ability of A-b-B and A-alt-B copolymers to recognize surface chemical patterns. When the adsorbing domain size exceeds the size of the copolymer's parallel component to the radius of gyration, A-b-B copolymers are found to transfer the surface pattern, while A-alt-B copolymers are able to replicate the surface pattern when heterogeneous domain sizes are smaller.
520 $a We introduce a novel "coloring" scheme to synthesize polystyrene-polybromostyrene (PS-co-PBrS) copolymers with statistically random (r-(PS-co-PBrS)) and random-blocky (b-(PS-co-PBrS)) monomer sequence distributions. Our results show that r-(PS-co-PBrS) and b-(PS-co-PBrS) copolymers with equivalent bromine contents possess different intrinsic viscosities and radii of gyration in solution. The interfacial behavior of the r-(PS-co-PBrS) and b-(PS-co-PBrS) copolymers is also found to differ. Thin films of r-(PS-co-PBrS) deposited onto flat, silica substrates covered with a semifluorinated self-assembled monolayer are found to dewet at a faster rate than b-(PS-co-PBrS) of comparable thickness at the same T-Tg, where Tg is the bulk glass transition temperature of the PS-co-PBrS copolymer.
520 $a Molecular insights into the "coloring" reaction are provided by Monte Carlo simulations of the experimental reaction scheme. The likelihood of chemically altering expanded homopolymer coils is found to be equal for all units along the length of the chain. In contrast, "coloring" of collapsed homopolymer coils reveals that the probability of modification is widely distributed.
590 $a School code: 0155.
650 4 $a Engineering, Chemical. $3 1018531
650 4 $a Chemistry, Polymer. $3 1018428
690 $a 0542
690 $a 0495
710 2 0 $a North Carolina State University. $3 1018772
773 0 $t Dissertation Abstracts International $g 64-11B.
790 1 0 $a Genzer, Jan, $e advisor
790 $a 0155
791 $a Ph.D.
792 $a 2004
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3112806