Star branched polystyrenes: an evaluation of solvent and temperature influences on unperturbed chain dimensions

Jimmy W. Mays; Nikos Hadjichristidis; Lewis J. Fetters

doi:10.1016/0032-3861(88)90084-5

Star branched polystyrenes: an evaluation of solvent and temperature influences on unperturbed chain dimensions

Jimmy W. Mays^*, Nikos Hadjichristidis, Lewis J. Fetters

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

Temperature coefficients of unperturbed dimensions of three high molecular weight polystyrene stars have been evaluated from intrinsic viscosity measurements in six theta solvents and two solvent/nonsolvent mixtures over a temperature range of 10 to 70°C. Larger values of unperturbed dimensions were found in cyclic aliphatic solvents than in chloroalkanes at similar temperatures. Negative values of the temperature coefficient of unperturbed dimensions were found in both solvent series, values which were in essential agreement with those found for linear polystyrene. The values of the branching index, g′, were found to be independent of both temperature and solvent type.

Original language	English (US)
Pages (from-to)	680-685
Number of pages	6
Journal	Polymer
Volume	29
Issue number	4
DOIs	https://doi.org/10.1016/0032-3861(88)90084-5
State	Published - Apr 1988
Externally published	Yes

Keywords

branching index
intrinsic viscosities
star polystyrenes
theta temperature
unperturbed dimensions

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Materials Chemistry

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10.1016/0032-3861(88)90084-5

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@article{59c676a91d354da5a159476a635d0a12,

title = "Star branched polystyrenes: an evaluation of solvent and temperature influences on unperturbed chain dimensions",

abstract = "Temperature coefficients of unperturbed dimensions of three high molecular weight polystyrene stars have been evaluated from intrinsic viscosity measurements in six theta solvents and two solvent/nonsolvent mixtures over a temperature range of 10 to 70°C. Larger values of unperturbed dimensions were found in cyclic aliphatic solvents than in chloroalkanes at similar temperatures. Negative values of the temperature coefficient of unperturbed dimensions were found in both solvent series, values which were in essential agreement with those found for linear polystyrene. The values of the branching index, g′, were found to be independent of both temperature and solvent type.",

keywords = "branching index, intrinsic viscosities, star polystyrenes, theta temperature, unperturbed dimensions",

author = "Mays, {Jimmy W.} and Nikos Hadjichristidis and Fetters, {Lewis J.}",

year = "1988",

month = apr,

doi = "10.1016/0032-3861(88)90084-5",

language = "English (US)",

volume = "29",

pages = "680--685",

journal = "Polymer",

issn = "0032-3861",

publisher = "Elsevier",

number = "4",

}

TY - JOUR

T1 - Star branched polystyrenes

T2 - an evaluation of solvent and temperature influences on unperturbed chain dimensions

AU - Mays, Jimmy W.

AU - Hadjichristidis, Nikos

AU - Fetters, Lewis J.

PY - 1988/4

Y1 - 1988/4

N2 - Temperature coefficients of unperturbed dimensions of three high molecular weight polystyrene stars have been evaluated from intrinsic viscosity measurements in six theta solvents and two solvent/nonsolvent mixtures over a temperature range of 10 to 70°C. Larger values of unperturbed dimensions were found in cyclic aliphatic solvents than in chloroalkanes at similar temperatures. Negative values of the temperature coefficient of unperturbed dimensions were found in both solvent series, values which were in essential agreement with those found for linear polystyrene. The values of the branching index, g′, were found to be independent of both temperature and solvent type.

AB - Temperature coefficients of unperturbed dimensions of three high molecular weight polystyrene stars have been evaluated from intrinsic viscosity measurements in six theta solvents and two solvent/nonsolvent mixtures over a temperature range of 10 to 70°C. Larger values of unperturbed dimensions were found in cyclic aliphatic solvents than in chloroalkanes at similar temperatures. Negative values of the temperature coefficient of unperturbed dimensions were found in both solvent series, values which were in essential agreement with those found for linear polystyrene. The values of the branching index, g′, were found to be independent of both temperature and solvent type.

KW - branching index

KW - intrinsic viscosities

KW - star polystyrenes

KW - theta temperature

KW - unperturbed dimensions

UR - http://www.scopus.com/inward/record.url?scp=0023984970&partnerID=8YFLogxK

U2 - 10.1016/0032-3861(88)90084-5

DO - 10.1016/0032-3861(88)90084-5

M3 - Article

AN - SCOPUS:0023984970

SN - 0032-3861

VL - 29

SP - 680

EP - 685

JO - Polymer

JF - Polymer

IS - 4

ER -

Star branched polystyrenes: an evaluation of solvent and temperature influences on unperturbed chain dimensions

Abstract

Keywords

ASJC Scopus subject areas

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