The influence of side-chain and main-chain spacer lengths on the thermal and structural properties of diethanolamine based side-chain polyesters

Vesel, Alenka; Žigon, Majda

doi:10.1007/s00289-004-0311-z

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2006

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Cited by 3 publications

(2 citation statements)

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“…Polycations can be prepared from, among other methods, derivatives of diethanol amine, which have been used in the synthesis of mesogenic or liquid crystalline polyesters [25] and polyurethanes [26,27]. Polyester hydrochlorides have also been formed but no synthesis of quaternary polyesters has been reported up to the present [28].…”

Section: Introductionmentioning

confidence: 98%

Modification of montmorillonite by quaternary polyesters

Vesel

Brnardić

Žigon

et al. 2008

Journal of Non-Crystalline Solids

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Section: Introductionmentioning

confidence: 98%

Modification of montmorillonite by quaternary polyesters

Vesel

Brnardić

Žigon

et al. 2008

Journal of Non-Crystalline Solids

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“…Polyesters have also been synthesized; some of these were liquid crystals [19] but most formed a crystal smectic phase [20,21].…”

Section: Introductionmentioning

confidence: 99%

Side chain liquid crystalline diethanolamine‐based polyesters with methoxy and/or nitroazobenzene mesogenic moieties

Vesel

Žigon

2006

Liquid Crystals

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Side-chain polyesters based on diethanolamine and 5-hydroxyisophthalic acid with mesogenic methoxyazobenzene and nitroazobenzene groups were synthesized and their liquid crystalline properties were examined.Four different types of polyesters were prepared by using various combinations of monomers differing in the mesogen group and the length of the spacer. The thermal and structural properties depend on the type of polyester as well as on the side chain length. The glass transition and isotropization temperatures increase when the methoxyazobenzene group is bound to a diol and decrease when it is bound to an isophthalic acid. Most of the polyesters are thermotropic liquid crystals and form a nematic phase on heating. Some polyesters exhibit shear induced isotropisation to nematic transition up to 25uC above the isotropization temperature.

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