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Chain dynamics in binary polymer mix...

Wang, Shanfeng.

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Chain dynamics in binary polymer mixtures.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Chain dynamics in binary polymer mixtures./
Author:	Wang, Shanfeng.
Description:	203 p.
Notes:	Source: Dissertation Abstracts International, Volume: 64-10, Section: B, page: 4970.
Contained By:	Dissertation Abstracts International64-10B.
Subject:	Chemistry, Polymer. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3108230
ISBN:	0496557777

Chain dynamics in binary polymer mixtures.
Wang, Shanfeng.

Chain dynamics in binary polymer mixtures. - 203 p.

Source: Dissertation Abstracts International, Volume: 64-10, Section: B, page: 4970.

Thesis (Ph.D.)--The University of Akron, 2003.

In disagreement with the previous theories, the new experimental data indicate that the terminal relaxation time associated with the long chains decreases systematically with the short chain length and with the weight fraction &phis; of the long chains. These experimental observations have inspired the proposal of a new reptation theory to account for (1) the tube dilation due to the constraint release by short chains, (2) impedance of the long chain's curvilinear diffusion and (3) enhanced contour length fluctuation, all resulting from the incorporation of the short chains of length NS.

ISBN: 0496557777Subjects--Topical Terms:

1018428
Chemistry, Polymer.

Chain dynamics in binary polymer mixtures.
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020 $a 0496557777
035 $a (UnM)AAI3108230
035 $a AAI3108230
040 $a UnM $c UnM
100 1 $a Wang, Shanfeng. $3 1935401
245 1 0 $a Chain dynamics in binary polymer mixtures.
300 $a 203 p.
500 $a Source: Dissertation Abstracts International, Volume: 64-10, Section: B, page: 4970.
500 $a Adviser: Shi-Qing Wang.
502 $a Thesis (Ph.D.)--The University of Akron, 2003.
520 $a In disagreement with the previous theories, the new experimental data indicate that the terminal relaxation time associated with the long chains decreases systematically with the short chain length and with the weight fraction &phis; of the long chains. These experimental observations have inspired the proposal of a new reptation theory to account for (1) the tube dilation due to the constraint release by short chains, (2) impedance of the long chain's curvilinear diffusion and (3) enhanced contour length fluctuation, all resulting from the incorporation of the short chains of length NS.
520 $a Furthermore, we have studied the diffusion and rheological behavior of binary mixtures over the full composition using pulse-gradient NMR and oscillatory shear measurements. These experimental observations along with additional theoretical analyses have allowed a clear identification of different regimes in a dynamic "phase" diagram where the two axes are the probe chain's molecular weight NP and matrix molecular weight N M respectively.
520 $a In the dilute limit of the long chains, we focuses on the comparison between the theoretical predictions and rheological measurements of mixtures made of the entangling long chains dissolved in matrices of short chains of length NM with either NM > Ne or NM < Ne, where Ne is the critical chain length for entanglement. This investigation allows us to establish the trace chain dynamics in the various regimes.
590 $a School code: 0003.
650 4 $a Chemistry, Polymer. $3 1018428
690 $a 0495
710 2 0 $a The University of Akron. $3 1018399
773 0 $t Dissertation Abstracts International $g 64-10B.
790 1 0 $a Wang, Shi-Qing, $e advisor
790 $a 0003
791 $a Ph.D.
792 $a 2003
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3108230