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首页> 外文期刊>Journal of Applied Polymer Science >Shape memory and self-healing behavior of styrene-butadiene-styrene/ethylene-methacrylic acid copolymer (SBS/EMAA) elastomers containing ionic interactions
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Shape memory and self-healing behavior of styrene-butadiene-styrene/ethylene-methacrylic acid copolymer (SBS/EMAA) elastomers containing ionic interactions

机译：苯乙烯 - 丁二烯 - 苯乙烯/乙烯 - 甲基丙烯酸共聚物（SBS / EMAA）弹性体的形状记忆和自愈合行为含离子相互作用的弹性体

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摘要

Ionic interactions were introduced to styrene-butadiene-styrene (SBS) through blending with ethylene-methacrylic acid copolymer (EMAA) and zinc oxide (ZnO), and a following in situ neutralization reaction between the carboxyl groups of EMAA and ZnO. The resultant SBS/EMAA (60/40 wt %) blends containing zinc carboxylate crosslinks exhibited high modulus and strong long-time relaxation characteristics. With 74% of the carboxyl groups neutralized (zinc cation fraction of 1.7 wt %), the tensile strength of the blends was increased from 14.6 to 16.6 MPa, and the stress at 100% extension was increased from 4.8 to 8.1 MPa. The melting temperature of EMAA was utilized to trigger the shape memory behavior of SBS/EMAA, and the reversible ionic bonds endowed SBS with better shape memory and self-healing performance. The shape-fixing ratio and recovery ratio of SBS were increased from 90.2 and 56.5% up to 93.3 and 84.2%, respectively. When the cut surfaces of SBS/EMAA/Zn samples were brought back into contact and annealed at 100 degrees C for 1 h, the strength and the elongation at break were recovered by 36 and 21%, respectively. This introduction of ionic interactions through the EMAA-ZnO neutralization reactions imparts new functions to SBS thermoplastic elastomers. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 137, 48666.
机译：将离子相互作用引入苯乙烯 - 丁二烯 - 苯乙烯（SBS），并通过与乙烯 - 甲基丙烯酸共聚物（EMAA）和氧化锌（ZnO）共混，以及在Emaa和ZnO的羧基之间的原位中和反应。含有锌羧酸锌交联的所得的SBS / EMAA（60/40wt％）表现出高模量和强的长时间弛豫特性。含有74％的羧基中和（1.7wt％的锌阳离子分数），共混物的拉伸强度从14.6增加到16.6MPa，并且100％延伸的应力从4.8增加到8.1MPa。利用EMAA的熔化温度来触发SBS / EMAA的形状记忆行为，可逆离子键赋予SBS，具有更好的形状记忆和自愈合性能。 SB的形状固定率和恢复比率均分别从90.2增加到93.3和84.2％。当SBS / Emaa / Zn样品的切割表面被带回接触并在100℃下退火1小时时，分别回收36和21％的断裂强度和伸长率。通过EMAA-ZnO中和反应引入离子相互作用的新功能对SBS热塑性弹性体赋予新功能。 （c）2019 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,137,48666。

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