volume 30 issue 2 pages 266-272

Side-Chain Liquid-Crystalline Polysiloxanes via Anionic Polymerization:  (n-Undecyloxy)arenecarboxylic Acid Mesogens Linked to Poly(dimethylsiloxane-co-methylvinylsiloxane)

Publication typeJournal Article
Publication date1997-01-01
scimago Q1
wos Q1
SJR1.352
CiteScore9.0
Impact factor5.2
ISSN00249297, 15205835
Materials Chemistry
Organic Chemistry
Inorganic Chemistry
Polymers and Plastics
Abstract
A novel, anionic route to well-defined side-chain liquid-crystalline polysiloxanes is described. The usual cationic approach to these polymers leads to polydisperse materials with uncontrolled microstructures. Ring-opening polymerization of pentamethylvinylcyclotrisiloxane yielded a poly(dimethylsiloxane-co-methylvinylsiloxane) with a low polydispersity (M w /M n = 1.16), a controlled molar mass, and a uniform distribution of pendant vinyl groups along the chain. Vinyl-containing mesogenic molecules could be attached to the polysiloxane vinyl groups in a two-step hydrosilylation reaction by means of the coupling agent 1,1,3,3-tetramethyldisiloxane, yielding polymers with regularly spaced side groups. The flexible disiloxane link increases the mobility of the mesogenic moieties. In this study, 4-(n-undecyloxy)benzoic acid and the novel side group 4'-(n-undecyloxy)-4-biphenylcarboxylic acid were used as mesogens. The thermal behavior of the side-chain liquid-crystalline polymers was investigated by means of differential scanning calorimetry and optical microscopy.
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Hempenius M. A., Lammertink R. G., Vancso G. J. Side-Chain Liquid-Crystalline Polysiloxanes via Anionic Polymerization: (n-Undecyloxy)arenecarboxylic Acid Mesogens Linked to Poly(dimethylsiloxane-co-methylvinylsiloxane) // Macromolecules. 1997. Vol. 30. No. 2. pp. 266-272.
GOST all authors (up to 50) Copy
Hempenius M. A., Lammertink R. G., Vancso G. J. Side-Chain Liquid-Crystalline Polysiloxanes via Anionic Polymerization: (n-Undecyloxy)arenecarboxylic Acid Mesogens Linked to Poly(dimethylsiloxane-co-methylvinylsiloxane) // Macromolecules. 1997. Vol. 30. No. 2. pp. 266-272.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1021/ma9608784
UR - https://doi.org/10.1021/ma9608784
TI - Side-Chain Liquid-Crystalline Polysiloxanes via Anionic Polymerization: (n-Undecyloxy)arenecarboxylic Acid Mesogens Linked to Poly(dimethylsiloxane-co-methylvinylsiloxane)
T2 - Macromolecules
AU - Hempenius, Mark A.
AU - Lammertink, Rob G.H.
AU - Vancso, G. J.
PY - 1997
DA - 1997/01/01
PB - American Chemical Society (ACS)
SP - 266-272
IS - 2
VL - 30
SN - 0024-9297
SN - 1520-5835
ER -
BibTex |
Cite this
BibTex (up to 50 authors) Copy
@article{1997_Hempenius,
author = {Mark A. Hempenius and Rob G.H. Lammertink and G. J. Vancso},
title = {Side-Chain Liquid-Crystalline Polysiloxanes via Anionic Polymerization: (n-Undecyloxy)arenecarboxylic Acid Mesogens Linked to Poly(dimethylsiloxane-co-methylvinylsiloxane)},
journal = {Macromolecules},
year = {1997},
volume = {30},
publisher = {American Chemical Society (ACS)},
month = {jan},
url = {https://doi.org/10.1021/ma9608784},
number = {2},
pages = {266--272},
doi = {10.1021/ma9608784}
}
MLA
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MLA Copy
Hempenius, Mark A., et al. “Side-Chain Liquid-Crystalline Polysiloxanes via Anionic Polymerization: (n-Undecyloxy)arenecarboxylic Acid Mesogens Linked to Poly(dimethylsiloxane-co-methylvinylsiloxane).” Macromolecules, vol. 30, no. 2, Jan. 1997, pp. 266-272. https://doi.org/10.1021/ma9608784.