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Toward Sustainable and Strong ABA‐Type Thermoplastic Elastomers with Poly(ε‐Caprolactone‐co‐4‐Methyl‐ε‐Caprolactone) Soft Midblock and Polystyrene Hard End Blocks
Macromolecular Chemistry and Physics ( IF 2.5 ) Pub Date : 2021-02-01 , DOI: 10.1002/macp.202000385 Qi Yang 1 , Xiaohua Wang 2, 3 , Beibei Wang 2, 3 , Yingjun Liu 1 , Yu Sun 1 , Lihua Na 1 , Feng Wang 1, 4 , Chunyu Zhang 1 , Heng Liu 1 , Xuequan Zhang 1
Macromolecular Chemistry and Physics ( IF 2.5 ) Pub Date : 2021-02-01 , DOI: 10.1002/macp.202000385 Qi Yang 1 , Xiaohua Wang 2, 3 , Beibei Wang 2, 3 , Yingjun Liu 1 , Yu Sun 1 , Lihua Na 1 , Feng Wang 1, 4 , Chunyu Zhang 1 , Heng Liu 1 , Xuequan Zhang 1
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An array of ABA‐type thermoplastic elastomers (TPEs), that is, poly(styrene‐b‐(ε‐caprolactone‐co‐4‐methyl‐ε‐caprolactone)‐b‐styrene) (SCSs), with controlled molecular weights and narrow distributions, are synthesized by ring opening copolymerization of 4‐methyl‐ε‐caprolactone and ε‐caprolactone and subsequent atom transfer radical polymerization of styrene. Thermal and mechanical analyses indicate that the molecular weights of middle and end blocks have significant effect on both the thermal and mechanical performances. It is worth noting that the target polymer SCS(155, 0.33) shows tensile strength of up to ≈42 MPa and impressive ultimate elongations of up to 1100% which is much higher than common styrenic TPEs. Additionally, SCS(155, 0.33) also displays an elastic recovery value of 91.5% after 19 stress‐strain cycles, suggesting that a good elastic recovery property therein.
中文翻译：
寻求具有聚（ε-己内酯-co-4-甲基-ε-己内酯）软质中嵌段和聚苯乙烯硬质端基的可持续且坚固的ABA型热塑性弹性体
ABA型热塑性弹性体（TPE）的阵列，即，聚（苯乙烯- b - （ε-己内酯共-4-甲基ε己内酯） - b通过控制4-甲基-ε-己内酯和ε-己内酯的开环共聚反应以及随后的苯乙烯原子转移自由基聚合反应来合成分子量可控且分布窄的ε-苯乙烯）（SCSs）。热和机械分析表明，中间和末端嵌段的分子量对热和机械性能均具有显着影响。值得注意的是，目标聚合物SCS（155，0.33）的拉伸强度高达≈42MPa，极限伸长率高达1100％，远高于普通的苯乙烯TPE。此外，SCS（155，0.33）在19个应力-应变循环后也显示出91.5％的弹性回复值，表明其中具有良好的弹性回复特性。
更新日期：2021-02-18
中文翻译：
寻求具有聚（ε-己内酯-co-4-甲基-ε-己内酯）软质中嵌段和聚苯乙烯硬质端基的可持续且坚固的ABA型热塑性弹性体
ABA型热塑性弹性体（TPE）的阵列，即，聚（苯乙烯- b - （ε-己内酯共-4-甲基ε己内酯） - b通过控制4-甲基-ε-己内酯和ε-己内酯的开环共聚反应以及随后的苯乙烯原子转移自由基聚合反应来合成分子量可控且分布窄的ε-苯乙烯）（SCSs）。热和机械分析表明，中间和末端嵌段的分子量对热和机械性能均具有显着影响。值得注意的是，目标聚合物SCS（155，0.33）的拉伸强度高达≈42MPa，极限伸长率高达1100％，远高于普通的苯乙烯TPE。此外，SCS（155，0.33）在19个应力-应变循环后也显示出91.5％的弹性回复值，表明其中具有良好的弹性回复特性。
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