文献类型：期刊文献

英文题名：Structure and Morphology of Thermoplastic Polyamide Elastomer Based on Long-Chain Polyamide 1212 and Renewable Poly(trimethylene glycol)

作者：Jiang, Jie[1];Tang, Qiuyu[1];Pan, Xun[2];Xi, Zhenhao[1];Zhao, Ling[1,3];Yuan, Weikang[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Sch Chem Engn, Shanghai 200237, Peoples R China;[2]Flinders Univ S Australia, Flinders Inst Nanoscale Sci & Technol, Bedford Pk, SA 5042, Australia;[3]Xinjiang Univ, Coll Chem & Chem Engn, Urumqi 830046, Xinjiang, Peoples R China

年份：2020

卷号：59

期号：39

起止页码：17502

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20204509461071);WOS:【SCI-EXPANDED(收录号:WOS:000577113500058)】；

基金：This work was financially supported by the National Natural Science Foundation of China (21978089 and 21878256), the National Key Research and Development Program of China (2016YFB0303001), the Fundamental Research Funds for the Central Universities (22221818010), and the Taicang Outstanding Academic Leader Program.

语种：英文

外文关键词：Temperature - Elastomers - Reinforced plastics - Scanning electron microscopy - Differential scanning calorimetry - Nuclear magnetic resonance spectroscopy - High resolution transmission electron microscopy - Glycols - Morphology - Fourier transform infrared spectroscopy - Thermodynamic stability

摘要：Novel biobased thermoplastic polyamide elastomers (TPAEs) were synthesized using a long-chain polyamide 1212 (PA1212) oligomer and 100% renewably resourced poly-(trimethylene glycol) (PPDO) via a facile "two-step" melt polycondensation. The TPAEs are lightweight, with a density of 1.04 similar to 1.0S g cm(-1). The structure and morphology of the TPAEs with high biocontent were investigated by nuclear magnetic resonance (NMR), Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD), atomic force microscopy (AFM), transmission electron microscopy (TEM), and dynamic thermome-chanical analysis (DMA). The results show that the new biobased TPAEs have a clearly microphase-separated structure comprising quite low crystalline PA1212 segments and an amorphous PPDO segment at room temperature. The spherical rigid PA1212 domains for PA624-PPDO with a diameter of about 100 nm can well disperse in the amorphous PPDO phase. Moreover, the rigid PA1212 segments mutually interconnect with the increasing molecular weight of the PA1212 oligomer, and the typical PA1212 spherulites about 200 nm with lamellae structures have been found in PA2200-PPDO, filled with amorphous PPDO in the interlayer. Since the structure and morphology characteristics, the storage modulus (E') of TPAEs quickly decreases from about 3000 MPa in a glassy state to 400 MPa in a rubbery state. Furthermore, long-chain PA1212 segments contribute to the outstanding thermal stability; i.e., the initial decomposition temperatures of all TPAEs are over 360 degrees C. The novel biobased TPAEs with good low-temperature elastic, high elastic recovery, and good thermally stable properties are expected to have potential applications in CO2 separation and breathable dressing.