Synthesis and thermal decomposition of poly(dodecamethylene terephthalamide)

Li, Kaifeng; Yang, Shuhua; Fu, Peizhen; Wang, Yudong; Zhao, Qian

doi:10.1002/app.34416

Cited by 32 publications

(21 citation statements)

References 29 publications

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“…FTIR spectra of PA10T/1012 samples with different 1012 contents are shown in Figure . The characteristic peaks of amide groups are found: the peaks at 3309 cm −1 are due to the NH stretching vibration, the sharp peaks at 1622 cm −1 are attributed to the CO stretching vibration (amide I), another sharp peaks at 1537 cm −1 are assigned to the CN stretching and CONH bending vibration (amide II), the peaks at 1290 cm −1 are assigned to the CN stretching and CH bending vibration (amide III), the peaks at 637 cm −1 are assigned to the NH in‐plane bending vibration (amide V), and the weak peaks at 3074 cm −1 are attributed to the overtone of the NH bending vibration. Because the chemical structure of PA10T/1012 is similar to PA10T homopolymer, they have same characteristic vibration bands in FTIR spectra.…”

Section: Resultsmentioning

confidence: 99%

Poly(decamethylene terephthalamide) copolymerized with long‐chain alkyl dodecanedioic acid: Toward bio‐based polymer and improved performances

Zou

Wang

Feng

et al. 2018

J of Applied Polymer Sci

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Poly(decamethylene terephthalamide) (PA10T), a bio‐based high‐performance semi‐aromatic polyamide, has been commercialized in recent years. However, there still are some weaknesses restricting its application range, such as narrow melt processing window and low ductility. In this study, we chose dodecanedioic acid (a potential bio‐based raw material) as the comonomer to prepare copolyamides [poly(decamethylene terephthalamide/decamethylene dodecanediamide), PA10T/1012] for solving these problems. The basic properties of these copolyamides were characterized by viscosity measurement, Fourier transform infrared spectrometer, proton nuclear magnetic resonance, wide‐angle X‐ray diffraction, differential scanning calorimetry, thermogravimetric analysis, dynamic mechanical analysis, and tensile measurement. Results show that, compared to PA10T, PA10T/1012 exhibits wider melt processing window and more outstanding elongation at break. Meanwhile, PA10T/1012 is still qualified for high temperature resistant material. Furthermore, Tg, Td,5%, Td,10%, and Td,max of PA10T/1012 show a linear dependence on 1012 content, which is helpful to design new bio‐based copolyamides for meeting the needs of various occasions. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46531.

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Section: Resultsmentioning

confidence: 99%

Poly(decamethylene terephthalamide) copolymerized with long‐chain alkyl dodecanedioic acid: Toward bio‐based polymer and improved performances

Zou

Wang

Feng

et al. 2018

J of Applied Polymer Sci

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“…The band at 3308 cm −1 is assigned to hydrogen bond and ν N–H in polyamide. The bands at 1622, 1537, 1495, 1288 and 637 cm −1 are assigned to amide Ⅰ ( ν C=O ), amide Ⅱ ( ν C–N and δ N–H ), amide Ⅲ ( ν C–N and δ C–H ), amide Ⅳ ( ν C–CO ) and amide Ⅴ ( δ N–H ), respectively [ 34 ]. And the intensity of these bands decrease with the content of 1014 units increasing, which attributed to the longer molecular chain of 1,12-dodecanedicarboxylic acid compared with terephthalic acid so that the amide bonds density of PA10T/1014 is lower than PA10T.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of semiaromatic copolyamide 10T/1014 with high performance and flexibility

Feng

Wang

Zou

et al. 2018

Designed Monomers and Polymers

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Poly (decamethylene terephthalamide) (PA10T) is a kind of engineering plastics with high strength and high modulus, but one of its disadvantages is its low elongation at break. In order to improve the flexibility of PA10T, one aliphatic comonomer with a long alkyl chain is introduced to the molecular chain of PA10T. Then long chain semiaromatic copolyamides 10T/1014 were synthesized with different contents of 1014 units by polycondensation reaction of 1,10-diaminodecane, terephthalic acid and 1,12-dodecanedicarboxylic acid in deionized water. The intrinsic viscosities of the resultant polyamides ranged from 0.90 to 1.03 dL/g were obtained. The chemical and crystal structures of the copolymers were characterized by FTIR, 1H-NMR and WAXD. These copolyamides exhibited outstanding thermal properties with melting points range of 306–295 °C and degradation temperatures range of 479–472 °C at maximum degradation rate, and also have a wider processing window than PA10T. The tensile strength of PA10T/1014 copolymers decreased gradually from 80.02 to 72.95 MPa as the content of 1014 units increasing from 5 to 20 mol %, while the elongation at break increased significantly from 57 to 150%. The moisture content of 10T/1014 copolyamides decreased with increasing the 1014 unit contents. It suggests that 10T/1014 copolyamides could be a kind of promising heat-resistant engineering thermoplastic in the future applications.

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“…The coupled absorption band at 2857 (symmetric) and 2952 cm −1 (asymmetric) are attributed to the stretching vibration of V C–H . The signals at 1630, 1536, 1460, 1255, and 686 cm −1 are attributed to amide-I (V C=O ), amide-II (V C –N stretch and V N –H band), amide-III (V C–N and δ C–H ), amide-IV (V C–C=O ), and amide-V (V N–H , out-of-plane bonding vibration), respectively [37]. Nonetheless, for the copolyamides with an increasing weight ratio of BABT/SA, these amide absorption bands appeared weaker, which denotes a reduction in the crystallinity order.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Low Melting Temperature Aliphatic-Aromatic Copolyamides Derived from Novel Bio-Based Semi Aromatic Monomer

et al. 2018

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This work investigated the synthesis of a novel low melting temperature polyamide 6 (PA6) copolyamide (PA6-BABT/SA) with different aliphatic/aromatic units weight content using a melt poly-condensation process. The bio-based aromatic N1,N4-bis(4-aminobutyl) terephthalamide diamine (BABT) and long-chain aromatic polyamide salt (BABT/SA, salt of BABT, and sebacic acid), components used for the synthesis of copolyamides, were obtained from bio-based monomers. For the first time, the pertinent BABT/SA aromatic polyamide salt was isolated as a white solid and completely characterized. By varying the weight ratio of BABT/SA salt, a series of copolyamides with different molecular weights and physical properties were prepared. The aromatic BABT/SA salt disrupted crystallization of the final copolyamides and lowered the onset of melting. The Fourier transform infrared spectroscopy and X-ray diffraction results indicated a steady decrease in the degrees of crystallinity with increasing BABT/SA salt segment ratio. Furthermore, compared to neat PA6, the obtained PA6-BABT/SA copolymers possessed a similar thermal stability and high transparency, but lower glass transition temperature around human body temperature. The PA6-BABT/SA copolymers with number-average molecular weight ≥30,000 Da presented good mechanical properties, specifically showing excellent tensile strength and elongation at break up to 105.2 MPa and 218.3%, respectively.

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Synthesis and thermal decomposition of poly(dodecamethylene terephthalamide)

Cited by 32 publications

References 29 publications

Poly(decamethylene terephthalamide) copolymerized with long‐chain alkyl dodecanedioic acid: Toward bio‐based polymer and improved performances

Poly(decamethylene terephthalamide) copolymerized with long‐chain alkyl dodecanedioic acid: Toward bio‐based polymer and improved performances

Synthesis and characterization of semiaromatic copolyamide 10T/1014 with high performance and flexibility

Synthesis of Low Melting Temperature Aliphatic-Aromatic Copolyamides Derived from Novel Bio-Based Semi Aromatic Monomer

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