Synthesis and properties of bio‐based poly(pentamethylene oxamide)

Mutua, Fredrick Nzioka; Cheng, Cong; Dong, Yusheng; Zheng, Chuyu; Zhu, Bo; He, Yong

doi:10.1002/pen.24596

Cited by 13 publications

(11 citation statements)

References 30 publications

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“…Recently, polyoxamide (POA) has attracted much attention as high heat resistance polyamide . POA (‐[NH(CH 2 ) x NHCOCO] n ‐) is a kind of special polyamide with the shortest diacid‐unit in the main chain.…”

Section: Introductionmentioning

confidence: 99%

Preparation and properties of poly(hexamethylene oxamide) copolymers containing ether moiety

Dong

Chen

Mutua

et al. 2017

Polymer Engineering & Sci

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To modify the properties of poly(hexamethylene oxamide) (PA62), amine-terminated polyoxypropylene glycols (PGs) were introduced into the polyoxamide main chain as soft segments. A series of PA62/PG2 copolymers were synthesized successfully by a two-step method. Fourier transform infrared spectroscopy, solution proton nuclear magnetic resonance spectroscopy ( 1 H-NMR), differential scanning calorimetry, thermogravimetric analysis, and wide-angle X-ray diffraction were used to analyze the structures and to investigate the properties of these copolymers. The saturated water absorption was also evaluated by gravimetric analysis for PA62/PG2 copolymers. The results revealed the incorporation of PG2 effectively modified the properties of PA62 and the copolymers with PG2 content of 10-20 mol% possessed high melting point (2938C-3148C), good thermal stability and low saturated water absorption. POLYM. ENG. SCI., 00:000-000, 2017.T 5 : the decomposition temperature corresponding to 5% mass loss. b T 50 : the decomposition temperature corresponding to 50% mass loss. c T max : the decomposition temperature corresponding to the maximum mass loss rate.

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Section: Introductionmentioning

confidence: 99%

Preparation and properties of poly(hexamethylene oxamide) copolymers containing ether moiety

Dong

Chen

Mutua

et al. 2017

Polymer Engineering & Sci

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“…However, 1,5‐pentamethylene diamine is expensive and unstable in supply in present, limiting its large‐scale application. Preliminary study confirmed that the properties of poly (hexamethylene oxamide) (PA62) copolymers are comparable with PA52, and it is far better than PA46 . The raw materials of PA62 are cheap and easy to obtain.…”

Section: Introductionmentioning

confidence: 85%

“…Recently, a novel bio‐based POA, poly (penta methylene oxamide) (PA52), possessing high melting point (~300°C) and low saturated water absorption (<3 wt %), has been developed. Its comprehensive performance is far superior to the existing high heat‐resistant polyamide.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of poly (1,6‐hexamethylene oxamide‐co‐m‐xylene oxamide) copolymers

Yang

Mutua

Gao

et al. 2018

Polymers for Advanced Techs

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To modify the properties of poly (hexamethylene oxamide) (PA62), m-xylylene diamine (MXD) was introduced into the polyamide main chain. A series of high molecular weight PA62/MXD2 were synthesized via a two-step method. The chemical structure of polymer was analyzed by Fourier transform infrared spectroscopy and proton nuclear magnetic resonance spectroscopy, and the results confirmed the formation of PA62/MXD2. DSC test showed that the T m of the copolymers were decreased as the molar contents of MXD in the range of 10 to 50 mol %. TGA analysis revealed that the thermal stability of the copolymers compared well with commercial PA6. Wide-angle X-ray diffraction studies suggested the copolymers with MXD content of 0 to 10 mol % possessed high crystallinity. The water uptake measurements were monitored, and the saturated water absorptions were found to be lower than 2.5 wt %. These properties gave them a competitive edge for application where precise dimensional stability and high thermal resistanceproperties are required.

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“…In this method, polyoxamides with η int = 1.9 were prepared. Recently, much research on polyoxamides has been reported by utilizing this two‐step polymerization method, and high‐performance polyoxamides have been successfully synthesized 24–29 …”

Section: Introductionmentioning

confidence: 99%

“…Recently, much research on polyoxamides has been reported by utilizing this two-step polymerization method, and high-performance polyoxamides have been successfully synthesized. [24][25][26][27][28][29] Comonomers are commonly utilized in polyamides to change the melt temperature and improve the processability. In this way, random copolyamides can be easily prepared.…”

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confidence: 99%

Synthesis and characterization of poly(hexamethylene terephthalate/hexamethylene oxamide) alternating copolyamide (alt‐PA6T/62)

Gao

Yang

Wang

et al. 2020

J of Applied Polymer Sci

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As a representative polyoxamide, poly(hexamethylene oxamide) (PA62) has good comprehensive performance. However, the high T m (330 C) creates an obstacle for processing. To improve the processability of PA62, poly(hexamethylene terephthalate/hexamethylene oxamide) alternating copolyamide (alt-PA6T/62) was synthesized by hexamethylene diamine-terminated 6T6-diamine and dibutyl oxalate via solution/solid state polycondensation. Random copolyamide (ran-PA6T/62) was also synthesized for comparison. The structure and properties of the copolymer were analyzed by Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance (NMR) spectroscopy, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), Wide-angle X-ray diffraction (WAXD) and the saturated water absorption test. The NMR results confirm the alternating structure of alt-PA6T/62. The DSC and TGA results demonstrate that the novel alternating copolyamide alt-PA6T/62 (T m = 321 C, T 5 = 420 C) exhibited better thermal properties than those of ran-PA6T/62 (T m = 294 C, T 5 = 412 C). The saturated water absorption of alt-PA6T/62 was found to be 3.2 wt%. These results revealed that the novel alt-PA6T/62 had an alternating sequence distribution, showed a high melting point as well as good processability and thermal stability, and possessed low saturated water absorption and excellent dimensional stability.

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Synthesis and properties of bio‐based poly(pentamethylene oxamide)

Cited by 13 publications

References 30 publications

Preparation and properties of poly(hexamethylene oxamide) copolymers containing ether moiety

Preparation and properties of poly(hexamethylene oxamide) copolymers containing ether moiety

Synthesis and characterization of poly (1,6‐hexamethylene oxamide‐co‐m‐xylene oxamide) copolymers

Synthesis and characterization of poly(hexamethylene terephthalate/hexamethylene oxamide) alternating copolyamide (alt‐PA6T/62)

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