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Smart polymer materials.

Bowling Green State University.

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Smart polymer materials.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Smart polymer materials./
Author:	Kuruwita-Mudiyanselage, Thilini Dhakshina.
Description:	128 p.
Notes:	Adviser: Douglas C. Neckers.
Contained By:	Dissertation Abstracts International69-10B.
Subject:	Chemistry, Polymer. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3334158
ISBN:	9780549868668

Smart polymer materials.
Kuruwita-Mudiyanselage, Thilini Dhakshina.

Smart polymer materials. - 128 p.

Adviser: Douglas C. Neckers.

Thesis (Ph.D.)--Bowling Green State University, 2008.

Photochromic superabsorbent polymers with a hydrophilic core and a photochromic shell were prepared by inverse suspension polymerization using acrylic acid (AA) and acrylamide (AM) as monomers, potassium-persulfate as the initiator, N, N'-methylene bisacrylamide (BIS) as a crosslinker, sorbitan monostearate (Span60) as the dispersant, cyclohexane as the solvent and bis(methacryloylamino)-azobenzene (AC) as the photochromic surface cross-linker. The polymer was characterized by NMR, infrared spectroscopy, thermogravimetric analysis and differential scanning calorimetry.

ISBN: 9780549868668Subjects--Topical Terms:

1018428
Chemistry, Polymer.

Smart polymer materials.
LDR:03200nam 2200289 a 45 001 852537
005 20100630
008 100630s2008 ||||||||||||||||| ||eng d
020 $a 9780549868668
035 $a (UMI)AAI3334158
035 $a AAI3334158
040 $a UMI $c UMI
100 1 $a Kuruwita-Mudiyanselage, Thilini Dhakshina. $3 1018459
245 1 0 $a Smart polymer materials.
300 $a 128 p.
500 $a Adviser: Douglas C. Neckers.
500 $a Source: Dissertation Abstracts International, Volume: 69-10, Section: B, page: 6134.
502 $a Thesis (Ph.D.)--Bowling Green State University, 2008.
520 $a Photochromic superabsorbent polymers with a hydrophilic core and a photochromic shell were prepared by inverse suspension polymerization using acrylic acid (AA) and acrylamide (AM) as monomers, potassium-persulfate as the initiator, N, N'-methylene bisacrylamide (BIS) as a crosslinker, sorbitan monostearate (Span60) as the dispersant, cyclohexane as the solvent and bis(methacryloylamino)-azobenzene (AC) as the photochromic surface cross-linker. The polymer was characterized by NMR, infrared spectroscopy, thermogravimetric analysis and differential scanning calorimetry.
520 $a The influence of the polymerization parameters on the properties of the SAPs, water absorption (Q), morphology of the SAPs, swelling kinetics, salt resistance, and the reversibility of water absorption were investigated. The prepared SAPs have excellent water absorption, rapid water uptake, and good resistance to NaCl solutions. Furthermore, they show better reversible water uptake than the previously reported SAPs. The average water absorbency is 2800 g/g and 181 g/g of liquid absorbance in 0.025 M NaCl solution. The initial water uptake rate is 1357 g/g/min and the reversibility of water absorption is 200 g/g in the repeated fourth cycle. The polymer is stable up to 210°C. When the sample is irradiated at 350 nm water expulsion from the swollen PSAPs was observed.
520 $a Two new easily polymerizable dithienylethene compounds have been synthesized, analyzed and tested in polymerization. The new materials 1,2-Bis(5-ethyleneyl-2-methylthien-3-yl)cyclopentene (DT1) and 1,2-Bis(5-(2-methylprop-2-enoyl)-2-methylthien-3-yl)cyclopentene (CT2) were obtained by incorporating polymerizable functional groups (ethyleneyl and methacryloyl) at the 5 and 5' positions of the thiophene rings in a diarylethene structure. Both compounds act as photochromic materials. Color occurs reversibly by irradiating with UV and with visible light respectively. Thermal stability, fatigue resistance and polymerizability for both compounds were analysed. Both derivatives can be easily incorporated into polymer matrixes by either photo-curing or radical polymerization. Polymer materials incorporating DT derivatives undergo reversible color changes upon irradiation with UV and visible light respectively. The photochromic films were applied in an erasable recording photon mode.
590 $a School code: 0018.
650 4 $a Chemistry, Polymer. $3 1018428
690 $a 0495
710 2 $a Bowling Green State University. $3 676285
773 0 $t Dissertation Abstracts International $g 69-10B.
790 $a 0018
790 1 0 $a Neckers, Douglas C., $e advisor
791 $a Ph.D.
792 $a 2008
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3334158