Effect of Aliphatic Diacid Chain Length on Properties of Semiaromatic Copolyamides Based on PA10T and Their Theoretical Study

Effect of Aliphatic Diacid Chain Length on Properties of Semiaromatic Copolyamides Based on PA10T and Their Theoretical Study

A series of 10T/10X (X = 6, 8, 10, 12, 14, 16) copolyamides was synthesized, and the thermal and mechanical properties were investigated. The effects of the lengths of alkyl chains of diacids on their resultant properties were studied, and we found that the introduction of a small amount of aliphati...

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Veröffentlicht in:Industrial & engineering chemistry research 2019-05, Vol.58 (17), p.7217-7226
Hauptverfasser: Feng, Wutong, Zou, Guangji, Ding, Yue, Ai, Tianhao, Wang, Pingli, Ren, Zhonglai, Ji, Junhui
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container_end_page 7226
container_issue 17
container_start_page 7217
container_title Industrial & engineering chemistry research
container_volume 58
creator Feng, Wutong
Zou, Guangji
Ding, Yue
Ai, Tianhao
Wang, Pingli
Ren, Zhonglai
Ji, Junhui
description A series of 10T/10X (X = 6, 8, 10, 12, 14, 16) copolyamides was synthesized, and the thermal and mechanical properties were investigated. The effects of the lengths of alkyl chains of diacids on their resultant properties were studied, and we found that the introduction of a small amount of aliphatic diacid hardly changed the lattice parameters of the copolyamides. The T m and T c values of the 10T/10X copolyamides decreased and had a zigzag oscillation behavior as the lengths of alkyl chains on the diacids increased. A density functional theory study showed that the observed behaviors were related to the change in hydrogen bond strength and the length mismatches of the diacids in the copolymer chains. The tensile strength decreased slightly, while the elongation at break increased significantly with an increase in the chain length of the aliphatic diacid; further, the notched impact strength decreased but was still higher than PA10T.
doi_str_mv 10.1021/acs.iecr.9b01041
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