Tailoring the Phase Behavior in Thermotropic Copolyesters

Martínez‐Gómez, Aránzazu; Pérez, Ernesto; Bello, A.

doi:10.1002/macp.201100141

Cited by 4 publications

(2 citation statements)

References 42 publications

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“…As mentioned in the Introduction, by simple variations in the spacer it is possible to prepare polybibenzoates exhibiting smectic mesophases with varying degrees of order and with thermal transitions in a wide temperature range, which may be even above 300 °C when using short methylenic spacers . Additionally, those parameters can be also tailored by copolymerization ,− (as it has been shown also in other polymer systems). For instance, transitions near room temperature are obtained by using triethylene glycol as spacer and different proportions of bibenzoate and naphthalate units (the latter ones being nonmesogenic).…”

Section: Discussionmentioning

confidence: 98%

“…13 Additionally, those parameters can be also tailored by copolymerization 17,32−34 (as it has been shown also in other polymer systems 35 ). For instance, transitions near room temperature are obtained 34 by using triethylene glycol as spacer and different proportions of bibenzoate and naphthalate units (the latter ones being nonmesogenic).…”

Section: Discussionmentioning

confidence: 99%

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Preparation and Properties of a Main-Chain Smectic Liquid-Crystalline Elastomer with Shape-Memory Ability

et al. 2016

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This article presents the preparation of a smectic liquid-crystalline elastomer from a main-chain polybibenzoate with cross-linkable methacrylate groups incorporated at the ends of the polymeric chains. The advantage of this functionalization is that it can be thermally cross-linked in the bulk state without initiator. Rheological experiments have established that temperatures around 20− 30 °C above the isotropization point were found to be the most appropriate for the preparation of the network, leading to excellent sheets with a superior crosslinking yield, and prepared in relatively short curing times. The DSC and X-ray diffraction experiments indicate that the network retains the liquid crystalline ability (with a slightly smaller order than that of the linear polymer). The shapememory behavior of the network has been determined from the well-known cyclic thermomechanical experiments. It follows that the investigated network shows a rather remarkable shape-memory behavior, with considerably good shape recovery and shape fixity values.

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