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Hierarchical organization in polymer...

Shin, Dongseok.

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Hierarchical organization in polymeric systems.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Hierarchical organization in polymeric systems./
Author:	Shin, Dongseok.
Description:	122 p.
Notes:	Adviser: Thomas P. Russell.
Contained By:	Dissertation Abstracts International68-11B.
Subject:	Chemistry, Polymer. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3289258
ISBN:	9780549330677

Hierarchical organization in polymeric systems.
Shin, Dongseok.

Hierarchical organization in polymeric systems. - 122 p.

Adviser: Thomas P. Russell.

Thesis (Ph.D.)--University of Massachusetts Amherst, 2007.

Hierarchical assembly of materials has attracted significant interest, since it provides opportunities to fabricate novel materials. In this thesis, we investigated three different systems where polymer chains organize hierarchically.

ISBN: 9780549330677Subjects--Topical Terms:

1018428
Chemistry, Polymer.

Hierarchical organization in polymeric systems.
LDR:03293nam 2200349 a 45 001 957405
005 20110630
008 110630s2007 ||||||||||||||||| ||eng d
020 $a 9780549330677
035 $a (UMI)AAI3289258
035 $a AAI3289258
040 $a UMI $c UMI
100 1 $a Shin, Dongseok. $3 1280757
245 1 0 $a Hierarchical organization in polymeric systems.
300 $a 122 p.
500 $a Adviser: Thomas P. Russell.
500 $a Source: Dissertation Abstracts International, Volume: 68-11, Section: B, page: 7604.
502 $a Thesis (Ph.D.)--University of Massachusetts Amherst, 2007.
520 $a Hierarchical assembly of materials has attracted significant interest, since it provides opportunities to fabricate novel materials. In this thesis, we investigated three different systems where polymer chains organize hierarchically.
520 $a First, a semicrystalline triblock copolymer, poly(L-lactic acid- b-ethylene oxide-b-L-lactic acid) (PLLA- b-PEO-b-PLLA), was prepared and the effect of the block-wise construction on the sequential crystallization was investigated by comparison to the corresponding homopolymer blend. In the resultant spherulitic morphology, the crystallization of PEO occurred within the framework established by the PLLA crystals. The preformed PLLA crystals biased the PEO chain orientation and the effect was more significant in the block copolymer system, where PEO chains were covalently anchored to PLLA.
520 $a Secondly, the influence of the microenvironment of multifunctional chains on their organization was studied. For this investigation, styrene-based linear polymers having two different pendant groups, a carboxylic acid and a neutral group, on every repeat unit were prepared. With alkyl (n-C 10H21-) groups as the neutral pendant, the linear macromolecules assembled into thermally reversible globular aggregates through non-covalent interaction with multifunctional tertiary amines. The aggregates had a structural hierarchy and remained stable without inter-particle crosslinking. In the absence of the alkyl pendant groups, control over the structure and properties of the aggregates was lost.
520 $a In a third system, the coupled self-assembly of bionanoparticles and block copolymers was investigated. A simple way to incorporate bionanoparticles into a thin film of water-insoluble block copolymer was developed by combining the bionanoparticle adsorption on a polymer film and subsequent annealing under solvent vapor. Through the use of a block copolymer having a positively charged component, the loading of bionanoparticles increased significantly. When highly loaded, a hierarchical co-assembly of the block copolymer and the bionanoparticle was observed where the microphase separation of the block copolymer forced a segregation of bionanoparticles to the grain boundaries, forming a much larger scale structure.
590 $a School code: 0118.
650 4 $a Chemistry, Polymer. $3 1018428
650 4 $a Engineering, Materials Science. $3 1017759
650 4 $a Physics, Condensed Matter. $3 1018743
690 $a 0495
690 $a 0611
690 $a 0794
710 2 $a University of Massachusetts Amherst. $b Polymer Science & Engineering. $3 1018485
773 0 $t Dissertation Abstracts International $g 68-11B.
790 $a 0118
790 1 0 $a Russell, Thomas P., $e advisor
790 1 0 $a Tew, Gregory N. $e committee member
790 1 0 $a Thayumanavan, Sankaran $e committee member
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3289258