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

被引：31
作者：
Guan, Qingbao [1 ]
Picken, Stephen J. [2 ]
Sheiko, Sergei S. [3 ]
Dingemans, Theo J. [1 ,4 ]
机构：
[1] Delft Univ Technol, Fac Aerosp Engn, Kluyverweg 1, NL-2629 HS Delft, Netherlands
[2] Delft Univ Technol, Fac Sci Appl, Julianalaan 136, NL-2628 BL Delft, Netherlands
[3] Univ North Carolina Chapel Hill, Dept Chem, Chapel Hill, NC 27599 USA
[4] Univ North Carolina Chapel Hill, Dept Appl Phys Sci, 1113 Murray Hall,121 South Rd, Chapel Hill, NC 27599 USA
来源：
MACROMOLECULES | 2017年 / 50卷 / 10期
基金：
美国国家科学基金会;
关键词：
MULTIPLE-SHAPE; POLYMERS; COMPOSITES; RECOVERY; BILAYERS; DESIGN;
D O I：
10.1021/acs.macromol.7b00569
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Thermoplastic and thermoset all-aromatic liquid crystal (LC) (AB)-multiblock copoly(ester imide)s based on N-(3'-hydroxyphenyptrimellitimide (IM), 4-hydroxybenzoic acid (HBA), and 6-hydroxy-2-naphthoic acid (HNA) were investigated as single-component high-temperature (>= 250 degrees C) shape memory polymers (SMPs). A high T-g (similar to 200 degrees C) HBA/IM block embedded in a low T-g (similar to 120 degrees C) HBA/HNA matrix creates a stable rubbery plateau that can be extended to similar to 240 degrees C by cross-linking. The shape fixation (Rf) and shape recovery efficiency. (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 similar to 100%) at 170 degrees C. After cross-linking the thermoplastic films a single component system as obtained that exhibited high-temperature (>= 250 degrees C) tunable triple SM and one-way reversible SM behavior.
引用
收藏
页码：3904 / 3911
页数：8
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