BROWSE

Related Researcher

Author's Photo

Chae, Han Gi
Polymer nano-composites and Carbon Fiber Laboratory (P&C Lab)
Research Interests
  • Polymer Physics/ Processing, Carbon Nano-materials, Ultra high performance/ multifuctional nano-composites, Smart textile/ fiber

ITEM VIEW & DOWNLOAD

Investigation of polyacrylonitrile solution inhomogeneity by dynamic light scattering

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Investigation of polyacrylonitrile solution inhomogeneity by dynamic light scattering
Author
Raghavan, VijayGupta, MurariXiao, ZhiweiChae, Han GiLiu, TaoKumar, Satish
Keywords
SEMIDILUTE POLYMER-SOLUTIONS; CARBON-FIBER; SLOW MODE; STABILIZATION; POLYSTYRENE; CYCLOHEXANE; TEMPERATURE; BEHAVIOR; DIFFUSION
Issue Date
2015-06
Publisher
WILEY-BLACKWELL
Citation
POLYMER ENGINEERING AND SCIENCE, v.55, no.6, pp.1403 - 1407
Abstract
Dynamic light scattering (DLS) has been used to quantify nanoscale heterogeneity in the industrially significant polyacrylonitrile (PAN) polymer solution. The heterogeneity in polymer solution, traced by the ratio of amplitudes of the slow to fast mode, is observed to be related to various parameters, such as molecular weight of the polymer, the type of co-monomer, processing time, concentration of the solution, and the choice of the solvents. It has been identified that low molecular weight PAN homopolymer have the least heterogeneity issues. Amongst the chosen co-polymers for this study, similar degree of heterogeneity was observed at concentration slightly above the critical concentration at which the polymer chains begin to overlap. Whereas, at higher concentration, PAN-methacrylic acid (4 wt%) copolymer showed the least heterogeneity issue. The aggregate diffusion coefficient of PAN-methacrylic acid (4 wt%) copolymer solution in dimethylformamide (DMF) and N,N-dimethylacetamide (DMAc) are respectively determined to be approximate to 1.6 x 10(-12) cm(2)/s and approximate to 1.6 x 10(-13) cm(2)/s, which results in an estimated aggregate size of 9 nm and 90 nm. POLYM. ENG. SCI., 55:1403-1407, 2015. (c) 2015 Society of Plastics Engineers
URI
Go to Link
DOI
10.1002/pen.24084
ISSN
0032-3888
Appears in Collections:
MSE_Journal Papers
Files in This Item:
Raghavan_et_al-2015-Polymer_Engineering_&_Science.pdf Download

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU