High-Temperature Shape Memory Behavior of Novel All-Aromatic (AB)n-Multiblock Copoly(ester imide)s

Qingbao Guan; Stephen J. Picken; Sergei S. Sheiko; Theo J. Dingemans

doi:10.1021/acs.macromol.7b00569

High-Temperature Shape Memory Behavior of Novel All-Aromatic (AB)_n-Multiblock Copoly(ester imide)s

Qingbao Guan
, Stephen J. Picken
, Sergei S. Sheiko
, Theo J. Dingemans^*

^*Corresponding author for this work

ChemE/Advanced Soft Matter

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

32 Citations (Scopus)

Abstract

Thermoplastic and thermoset all-aromatic liquid crystal (LC) (AB)_n-multiblock copoly(ester imide)s based on N-(3′-hydroxyphenyl)trimellitimide (IM), 4-hydroxybenzoic acid (HBA), and 6-hydroxy-2-naphthoic acid (HNA) were investigated as single-component high-temperature (≥250 °C) shape memory polymers (SMPs). A high T_g (∼200 °C) HBA/IM block embedded in a low T_g (∼120 °C) HBA/HNA matrix creates a stable rubbery plateau that can be extended to ∼240 °C by cross-linking. The shape fixation (R_f) and shape recovery efficiency (R_r) of the thermoplastic and thermoset films were investigated using a rheometer in torsion mode. Thermoplastic LC copoly(ester imide) films showed excellent dual SM behavior (R_f and R_r ∼ 100%) at 170 °C. After cross-linking the thermoplastic films a single component system as obtained that exhibited high-temperature (≥250 °C) tunable triple SM and one-way reversible SM behavior.

Original language	English
Pages (from-to)	3903-3910
Number of pages	8
Journal	Macromolecules
Volume	50
Issue number	10
DOIs	https://doi.org/10.1021/acs.macromol.7b00569
Publication status	Published - 23 May 2017

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title = "High-Temperature Shape Memory Behavior of Novel All-Aromatic (AB)n-Multiblock Copoly(ester imide)s",

abstract = "Thermoplastic and thermoset all-aromatic liquid crystal (LC) (AB)n-multiblock copoly(ester imide)s based on N-(3′-hydroxyphenyl)trimellitimide (IM), 4-hydroxybenzoic acid (HBA), and 6-hydroxy-2-naphthoic acid (HNA) were investigated as single-component high-temperature (≥250 °C) shape memory polymers (SMPs). A high Tg (∼200 °C) HBA/IM block embedded in a low Tg (∼120 °C) HBA/HNA matrix creates a stable rubbery plateau that can be extended to ∼240 °C by cross-linking. The shape fixation (Rf) and shape recovery efficiency (Rr) of the thermoplastic and thermoset films were investigated using a rheometer in torsion mode. Thermoplastic LC copoly(ester imide) films showed excellent dual SM behavior (Rf and Rr ∼ 100\%) at 170 °C. After cross-linking the thermoplastic films a single component system as obtained that exhibited high-temperature (≥250 °C) tunable triple SM and one-way reversible SM behavior.",

author = "Qingbao Guan and Picken, \{Stephen J.\} and Sheiko, \{Sergei S.\} and Dingemans, \{Theo J.\}",

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doi = "10.1021/acs.macromol.7b00569",

language = "English",

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T1 - High-Temperature Shape Memory Behavior of Novel All-Aromatic (AB)n-Multiblock Copoly(ester imide)s

AU - Guan, Qingbao

AU - Picken, Stephen J.

AU - Sheiko, Sergei S.

AU - Dingemans, Theo J.

PY - 2017/5/23

Y1 - 2017/5/23

N2 - Thermoplastic and thermoset all-aromatic liquid crystal (LC) (AB)n-multiblock copoly(ester imide)s based on N-(3′-hydroxyphenyl)trimellitimide (IM), 4-hydroxybenzoic acid (HBA), and 6-hydroxy-2-naphthoic acid (HNA) were investigated as single-component high-temperature (≥250 °C) shape memory polymers (SMPs). A high Tg (∼200 °C) HBA/IM block embedded in a low Tg (∼120 °C) HBA/HNA matrix creates a stable rubbery plateau that can be extended to ∼240 °C by cross-linking. The shape fixation (Rf) and shape recovery efficiency (Rr) of the thermoplastic and thermoset films were investigated using a rheometer in torsion mode. Thermoplastic LC copoly(ester imide) films showed excellent dual SM behavior (Rf and Rr ∼ 100%) at 170 °C. After cross-linking the thermoplastic films a single component system as obtained that exhibited high-temperature (≥250 °C) tunable triple SM and one-way reversible SM behavior.

AB - Thermoplastic and thermoset all-aromatic liquid crystal (LC) (AB)n-multiblock copoly(ester imide)s based on N-(3′-hydroxyphenyl)trimellitimide (IM), 4-hydroxybenzoic acid (HBA), and 6-hydroxy-2-naphthoic acid (HNA) were investigated as single-component high-temperature (≥250 °C) shape memory polymers (SMPs). A high Tg (∼200 °C) HBA/IM block embedded in a low Tg (∼120 °C) HBA/HNA matrix creates a stable rubbery plateau that can be extended to ∼240 °C by cross-linking. The shape fixation (Rf) and shape recovery efficiency (Rr) of the thermoplastic and thermoset films were investigated using a rheometer in torsion mode. Thermoplastic LC copoly(ester imide) films showed excellent dual SM behavior (Rf and Rr ∼ 100%) at 170 °C. After cross-linking the thermoplastic films a single component system as obtained that exhibited high-temperature (≥250 °C) tunable triple SM and one-way reversible SM behavior.

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DO - 10.1021/acs.macromol.7b00569

M3 - Article

AN - SCOPUS:85019832270

SN - 0024-9297

VL - 50

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JO - Macromolecules

JF - Macromolecules

IS - 10

ER -

High-Temperature Shape Memory Behavior of Novel All-Aromatic (AB)_n-Multiblock Copoly(ester imide)s

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