Determination and Comparison of Molar Mass Distributions of Substituted Polystyrenes and Block Copolymers Using Thermal Field-Flow Fractionation, Size Exclusion Chromatography and Light Scattering

Ritva Dammert, Matti Jussila, Pertti Vastamäki, Marja-Liisa Riekkola, Franciska Sundholm

Research output: Contribution to journalArticleScientificpeer-review

16 Citations (Scopus)

Abstract

Anionic polymerisations of p-methoxystyrene, p-methylstyrene, p-chlorostyrene and p-cyanostyrene were carried out in tetrahydrofuran (THF) and methylcyclohexane. The block copolymers poly(styrene-b-p-methoxystyrene-b-styrene), poly(styrene-b-p-methylstyrene-b-styrene) and poly(styrene-b-p-cyanostyrene) were also polymerised by using THF as solvent. The initiators included n-butyllithium (n-BuLi) and sodium naphthalenide. The use of both n-BuLi and sodium naphthalenide usually produced higher values of M̄n than were calculated. In the former case this could be explained by the lower reactivity of the initiator, which has been found to aggregate in THF. The molar masses were determined by thermal field-flow fractionation (ThFFF), size exclusion chromatography (s.e.c.) and light scattering (LS). ThFFF and the s.e.c. were used for determining the molar mass distributions. The agreement between the three methods was satisfactory.
Original languageEnglish
Pages (from-to)6273-6280
Number of pages8
JournalPolymer
Volume38
Issue number26
DOIs
Publication statusPublished - 1997
MoE publication typeA1 Journal article-refereed

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Styrene
Size exclusion chromatography
Molar mass
Polystyrenes
Fractionation
Light scattering
Block copolymers
Flow fields
Sodium
Anionic polymerization
Hot Temperature
tetrahydrofuran

Keywords

  • synthesis
  • block copolymers
  • control of molar masses

Cite this

@article{8003df567c864e66af05cb3788ed7a90,
title = "Determination and Comparison of Molar Mass Distributions of Substituted Polystyrenes and Block Copolymers Using Thermal Field-Flow Fractionation, Size Exclusion Chromatography and Light Scattering",
abstract = "Anionic polymerisations of p-methoxystyrene, p-methylstyrene, p-chlorostyrene and p-cyanostyrene were carried out in tetrahydrofuran (THF) and methylcyclohexane. The block copolymers poly(styrene-b-p-methoxystyrene-b-styrene), poly(styrene-b-p-methylstyrene-b-styrene) and poly(styrene-b-p-cyanostyrene) were also polymerised by using THF as solvent. The initiators included n-butyllithium (n-BuLi) and sodium naphthalenide. The use of both n-BuLi and sodium naphthalenide usually produced higher values of M̄n than were calculated. In the former case this could be explained by the lower reactivity of the initiator, which has been found to aggregate in THF. The molar masses were determined by thermal field-flow fractionation (ThFFF), size exclusion chromatography (s.e.c.) and light scattering (LS). ThFFF and the s.e.c. were used for determining the molar mass distributions. The agreement between the three methods was satisfactory.",
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author = "Ritva Dammert and Matti Jussila and Pertti Vastam{\"a}ki and Marja-Liisa Riekkola and Franciska Sundholm",
year = "1997",
doi = "10.1016/S0032-3861(97)00207-3",
language = "English",
volume = "38",
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Determination and Comparison of Molar Mass Distributions of Substituted Polystyrenes and Block Copolymers Using Thermal Field-Flow Fractionation, Size Exclusion Chromatography and Light Scattering. / Dammert, Ritva; Jussila, Matti; Vastamäki, Pertti; Riekkola, Marja-Liisa; Sundholm, Franciska.

In: Polymer, Vol. 38, No. 26, 1997, p. 6273-6280.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Determination and Comparison of Molar Mass Distributions of Substituted Polystyrenes and Block Copolymers Using Thermal Field-Flow Fractionation, Size Exclusion Chromatography and Light Scattering

AU - Dammert, Ritva

AU - Jussila, Matti

AU - Vastamäki, Pertti

AU - Riekkola, Marja-Liisa

AU - Sundholm, Franciska

PY - 1997

Y1 - 1997

N2 - Anionic polymerisations of p-methoxystyrene, p-methylstyrene, p-chlorostyrene and p-cyanostyrene were carried out in tetrahydrofuran (THF) and methylcyclohexane. The block copolymers poly(styrene-b-p-methoxystyrene-b-styrene), poly(styrene-b-p-methylstyrene-b-styrene) and poly(styrene-b-p-cyanostyrene) were also polymerised by using THF as solvent. The initiators included n-butyllithium (n-BuLi) and sodium naphthalenide. The use of both n-BuLi and sodium naphthalenide usually produced higher values of M̄n than were calculated. In the former case this could be explained by the lower reactivity of the initiator, which has been found to aggregate in THF. The molar masses were determined by thermal field-flow fractionation (ThFFF), size exclusion chromatography (s.e.c.) and light scattering (LS). ThFFF and the s.e.c. were used for determining the molar mass distributions. The agreement between the three methods was satisfactory.

AB - Anionic polymerisations of p-methoxystyrene, p-methylstyrene, p-chlorostyrene and p-cyanostyrene were carried out in tetrahydrofuran (THF) and methylcyclohexane. The block copolymers poly(styrene-b-p-methoxystyrene-b-styrene), poly(styrene-b-p-methylstyrene-b-styrene) and poly(styrene-b-p-cyanostyrene) were also polymerised by using THF as solvent. The initiators included n-butyllithium (n-BuLi) and sodium naphthalenide. The use of both n-BuLi and sodium naphthalenide usually produced higher values of M̄n than were calculated. In the former case this could be explained by the lower reactivity of the initiator, which has been found to aggregate in THF. The molar masses were determined by thermal field-flow fractionation (ThFFF), size exclusion chromatography (s.e.c.) and light scattering (LS). ThFFF and the s.e.c. were used for determining the molar mass distributions. The agreement between the three methods was satisfactory.

KW - synthesis

KW - block copolymers

KW - control of molar masses

U2 - 10.1016/S0032-3861(97)00207-3

DO - 10.1016/S0032-3861(97)00207-3

M3 - Article

VL - 38

SP - 6273

EP - 6280

JO - Polymer

JF - Polymer

SN - 0032-3861

IS - 26

ER -