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Hydrogen bonding and thermoplastic elastomers - a nice couple with temperature-adjustable mechanical properties
被引:0
作者:
Wittenberg, Elisabeth
[1
]
Meyer, Andreas
[1
]
Eggers, Steffen
[1
]
Abetz, Volker
[1
,2
]
机构:
[1] Univ Hamburg, Dept Phys Chem, Martin Luther King Pl 6, D-20146 Hamburg, Germany
[2] Zentrum Mat & Kustenforsch GmbH, Helmholtz Zentrum Geesthacht, Inst Polymer Sci, Max Planck Str 1, D-21502 Geesthacht, Germany
来源:
关键词:
COOPERATIVE STRUCTURE FORMATION;
ASSOCIATION CHAIN POLYMERS;
PI-PI STACKING;
MOLECULAR-WEIGHT;
COPOLYMER;
NETWORKS;
COVALENT;
RUBBER;
COMBINATION;
COMPLEXES;
D O I:
10.1039/c8sm00296g
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
Styrene-butadiene copolymers are modified with varying fractions of benzoic acid moieties being able to perform hydrogen bonding. This is done by using a simple synthetic approach which utilizes click chemistry. Temperature-dependent dynamic mechanical properties are studied, and it turns out that even the apparently rather simple hydrogen bonding motif has a marked impact on the material properties due to the fact that it facilitates the formation of a supramolecular polymer network. Besides a glass transition, the investigated functionalized copolymers exhibit a second endothermic transition, known as a quasi-melting. This is related to the opening of the hydrogen bonding complexes. Additionally to dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC), temperature-dependent infrared (IR) spectroscopy and small angle X-ray scattering (SAXS) are used to understand the structure-property relationships.
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页码:2701 / 2711
页数:11
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