POLYMER BULLETIN
·
2024
·
IF 3.1
Zhu Rongli,Pu Zejun,Peng Qiuxia,Wang Xu,Zheng Pan,Wu Fang,Yu Dayang,Ni Wenlong,Chen Keli,Zhong Jiachun
Heat-resistant semi-aromatic poly (decamethylene terephthalamide) acid (PA10T) and a series of poly (decamethylene terephthalamide/decamethylene furanamide) (PA10T/10F) with a high content of bio-based carbon were synthesized by a cost-effective high-pressure solution polycondensation method. The chemical structures of the obtained samples were evaluated by Fourier infrared spectroscopy (FT-IR). Moreover, the effect of the addition of copolymer 2,5-furandicarboxylic acid (FDCA) and the copolymerization ratios of FDCA for PA10T on thermal performances, crystallization behaviors, and mechanical properties of PA10T and PA10T/10F were studied in detail. In addition, the results of DSC indicate that the melting points of PA10T/10F copolyamides can be adjusted appropriately by varying the feed ratios of FDCA, suggesting the improvement of processabilities. Besides, with increasing the copolymerization ratios of FDCA, the sizes of spherulites decreased gradually analyzed by POM. Furthermore, the results of XRD showed that the PA10T homopolymer and PA10T/10F copolyamides possess similar shapes around 2θ = 21°. In addition, compared with pure PA10T, the tensile strength, breaking elongation, bending strength, bending modulus, and izod impact strength all increased obviously when the feed ratio of FDCA and terephthalic acid (PTA) was 5:95. Therefore, the crystallization behaviors, processing performances, and mechanical characteristics of PA10T can be improved significantly by introducing FDCA, to improve the bio-based carbon content of PA10T and meet the increasing demand for environmentally friendly materials all over the world.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2024
·Vol. 31
·期 9
·1-8
·
IF 2.6
Meng Chihan,Zhong Jiachun,Pu Zejun,Wu Wenhui,Yang Yuhao
In this paper, the polycondensation kinetics of bio-based semi-aromatic high temperature polyamide PA10T/1010 was studied in a micro high-temperature and high-pressure reactor. The polycondensation experiment of PA10T/1010 salt solution with temperature of 235 ℃-295 ℃ and initial water content of 5 wt%-25 wt% was carried out. The change of end group content in the reaction process was investigated, and the relationship between polymer equilibrium molecular weight and temperature and water content was explored. The results showed that the end group concentration decreased rapidly at the beginning of the reaction, approached equilibrium after a period of time, and the higher the temperature, the higher the initial water content and the lower the equilibrium molecular weight, indicating that the polycondensation of PA10T/1010 was an exothermic reaction; on this basis, a kinetics model of polycondensation reaction was established based on the literature model, it was considered that the polycondensation reaction is an acid catalyzed third-order reaction, and the effects of temperature and water content on the equilibrium and rate of polycondensation reaction can be investigated; The kinetics model of polycondensation reaction was obtained, and the calculated results of the model were basically consistent with the experimental values.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 10
·e53603
·
IF 3
Rongli Zhu,Zejun Pu,Hongbo Hou,Xu Wang,Xianyong Li,Dayang Yu,Jiachun Zhong,Ying Song
In this work, the antistatic effect of antistatic agent (AA) on semi-aromatic poly (decamethylene terephthalamide) (PA10T) with 30 wt.% glass fiber (GF) was investigated. The PA10T/AGF antistatic composites with excellent thermal characteristics, balanced toughness, and notched impact strength were prepared through one-step melt blending, and added the AA and GF to the PA10T matrix. Meanwhile, the structure, morphology, thermal properties, and mechanical properties were examined in detail by FT-IR, SEM, TGA, DSC, and tensile and impulse testing. The results showed that the antistatic GF dispersed well in the PA10T matrix and interacted well with the PA10T matrix. The antistatic properties increased with the increase of AA content, and AA/GF-5 composites had the best antistatic effect when AA content was 25 wt.%. However, with the increase of AA content, the melt temperature of PA10T/AGF composites decreased, while the machining performance and thermal stability of PA10T/AGF composites increased. The composites' tensile strength and breaking elongation followed a rising and falling pattern with increasing AA concentration. Notwithstanding, the notched impact strength of PA10T/AGF composites decreased and then increased. Therefore, this work provides us with a deep understanding of the antistatic effect of AA on polymers.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 22
·e53903
·
IF 3
Rongli Zhu,Zejun Pu,Hongbo Hou,Xianyong Li,Xu Wang,Dayang Yu,Pan Zheng,Fang Wu,Jiachun Zhong
This work synthesized the pure poly (decamethylene terephthalamide) acid (PA10T) and a series of PA10T/10I through an efficient one-pot melt polymerization method. The structures, thermal behavior, crystallization performance, and mechanical properties of PA10T and PA10T/10I were investigated by FT-IR, DSC, TGA, POM, XRD, and mechanics performance testing, respectively. The thermal analysis demonstrates that the melting temperature of PA10T/10I gradually decreased with the increase of isophthalic acid (IPA) copolymerization proportions. Specifically, it was observed that, the T m1 of pure PA10T was 299.5°C, while the T m1 of PA10T/10I-4 with a linear downward trend was 284.7°C. And the introduction of IPA copolymerization has an obvious beneficial effect on the thermal stability of PA10T/10I ( T d,5 varied from 429.5 to 434.5°C) with a wider temperature range of processing, which could potentially be applied in high-temperature scenes. POM and XRD were used to characterize the crystallization behavior of all samples further. It was discovered that although adding IPA did not alter the crystal structure of PA10T, it dramatically reduced the size of crystalline grains and increased the number of crystal nuclei. In addition, the copolyamides possess excellent mechanical properties, and the tensile strength of PA10T/10I varied between 42.91 and 46.89 MPa, the bending strength varied between 76.69 and 85.83 MPa, and the izod impact strength varied between 25.41 and 29.82 kJ m −2 . Moreover, the influence of the IPA comonomer of copolyamides PA10T/10I on melting points, thermal stability, crystallization behavior, and mechanical characteristics was investigated. This work provides a reference for preparing biobased semi-aromatic copolyamides PA10T/10I with outstanding processing performance, excellent thermal characteristics, and adjustable mechanical properties.
研究领域:
材料科学
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聚合物化学
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DOI
高影响因子
Nano Materials Science
·
2021
·
IF 0
Xiao-bo Fu,Xin Tong,Jia-cao Yang,Gang Zhang,Mei-lin Zhang,Xiao-jun Wang,Jie Yang
Poly (decamethylene terephthalamide/decamethylene isophthalamide)-block-polyvinyl alcoho) (PA10T/10I-PEG) copolymer/graphene oxide (GO) composites were prepared via in-situ melt polymerization and two different nano-filler addition approaches were compared. The relationship between the micro-structure and performance of the elastomer composites prepared by one-step and two-step methods was explored. The results show that the two-step method significantly promoted the dispersion of the GO in a polymer matrix, and facilitated the grafting of more hard molecular chains. Thus, the elastic modulus and tensile strength of the nano-composite have been significantly improved by the presence of GO. This was because of the strong interaction between the functional groups on the surface of the GO and the hard molecular chains. This would be also be favorable to load transfer across the interface. Additionally, the elongation at the break of composites increased by 10% with the addition of a small amount of GO (0.2% wt). This is because hard domains tend to be enriched on the surface of GO in composites and act as a lubricating layer at the interface between the GO and matrix, leading to increased deformation ability. This work provides an effective strategy to prepare elastomer composites with high strength and toughness.
研究领域:
材料科学
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高分子化学
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DOI
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Wutong Feng,Guangji Zou,Yue Ding,Tianhao Ai,Pingli Wang,Zhonglai Ren,Junhui Ji
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 Tm and Tc 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.
研究领域:
高分子科学
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材料科学
·
理论化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2026
·Vol. 33
·期 5
·213
·
IF 3.5
Meng Chihan,Li Hongjiao,Feng Xiao,Zhao Yuanbo,Zhong Jiachun,Pu Zejun,Luo Yuxiu,Zhang Gaoping
In this paper, long carbon chain bio-based semi-aromatic polyamide PA9T, PA10T and PA12T were synthesized by using bio-based monomers nonenediamine, decamethylene diamine and dodecane diamine as raw materials. Materials studio software, universal testing machine, impact testing machine and other software and instruments were used, the physical and chemical properties of PA9T, PA10T and PA12T were studied in detail from both micro and macro perspectives. The results show that in the single-molecule model, PA12T exhibits the largest Poisson’s ratio, but the smallest bulk modulus, shear modulus, and Young’s modulus; PA9T shows the opposite trend, while PA10T is intermediate between the two, indicating that the less methylene in the single molecule model, the better the mechanical properties. From the macroscopic point of view, with the increase of methylene content, the tensile strength and bending strength decreased, while the elongation at break and the impact strength increased. The density also showed a gradual decreasing trend, and the oil absorption rate and water absorption rate gradually decreased. At the same time, with the increase of carbon chain, the solvent resistance is gradually enhanced, and the performance retention rate is gradually increased.
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 136
·期 13
·47305
·
IF 1.901
Guangji Zou,Pingli Wang,Wutong Feng,Zhonglai Ren,Junhui Ji
Transparent polyamide (TPA) is a type of optically transparent material with high performance, and poly(decamethylene terephthalamide) (PA10T) is an emerging bio-based opaque polyamide. With the purpose of preparing bio-based and low-cost TPA based on PA10T, we chose dodecanedioic acid and isophthalic acid as comonomers, and successfully obtained a series of transparent PA10T/10I/1012. The basic properties of these copolyamides were characterized by intrinsic viscosity measurement, Fourier transform infrared spectrometer, proton nuclear magnetic resonance, X-ray diffraction, differential scanning calorimetry, thermogravimetric analysis, dynamic mechanical analysis, ultraviolet–visible spectrophotometer, solvent resistance test, water absorption measurement, and tensile measurement. Results show that PA10T/10I/1012 copolymers are amorphous and have high optical transparency. Moreover, these copolymers exhibit high thermal stability, low water absorption, and good solvent resistance, and they also show better mechanical properties compared to some commercial TPAs. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 136 , 47305.
研究领域:
材料科学
·
聚合物化学
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产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 30
·期 11
·1-10
·
IF 2.8
Zhu Rongli,Pu Zejun,Peng Qiuxia,Wang Xu,Wu Fang,Zheng Pan,Yu Dayang,Chen Keli,Ni Wenlong,Zhong Jiachun
In this study, the semi-aromatic poly (decamethylene terephthalamide) acid (PA10T) and an array of PA10T/1010 with various copolymerization content of the third monomer 1,10-decanedioic acid (DCA) were synthesized using a productive one-step melt polycondensation method. Importantly, the addition of DCA’s effect for PA10T on crystallization behaviors, thermal properties, and mechanical performances were extensively investigated. Additionally, the results of DSC demonstrate that all the melting temperature of PA10T/1010 copolyamides are significantly lower than PA10T by introducing the third monomer DCA, and the heat stability has been not significantly affected according to the results of TGA, suggesting the improvement of processing properties. Besides, compared with PA10T, the bending modulus, breaking elongation, tensile strength, and izod impact strength of PA10T/1010-1 all increase obviously, when the feed ratio of DCA and terephthalic acid (PTA) is 10:90. Thus, introducing bio-based DCA for copolymerization is a promising method to enhance both the processing and mechanical properties of PA10T.
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产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 30
·期 6
·1-8
·
IF 2.8
Zhu Rongli,Pu Zejun,He Gang,Peng Qiuxia,Zheng Pan,Wu Fang,Yu Dayang,Wang Xu,Hou Hongbo,Li Xianyong,Zhong Jiachun
Bio-based semi-aromatic poly (decamethylene terephthalamide) acid (PA10T) and a series of poly (decamethylene terephthalamide/hexamethylene terephthalamide) (PA10T/6 T) were synthesized by an efficient one-pot melt polymerization reaction. The chemical structures of the obtained samples were evaluated by fourier infrared spectroscopy (FT-IR). And the influence of addition of 1,6-hexanediamine (HAD) for copolyamides PA10T/6 T on melting points, thermal behaviors, crystallization performances, and mechanical characteristics of PA10T and PA10T/6 T were also analyzed thoroughly. The thermal analysis demonstrates that PA10T/6 T possess excellent thermal stability, and the melting temperatures can be tuned effectively by adding a suitable copolymerization content of the third monomer HAD to improve the processing properties appropriately. POM and XRD were used to research the crystallization behaviors showing that the addition of HAD did not alter the crystalline structure of PA10T essentially. Mechanical properties such as bending modulus and tensile strength of PA10T/6 T remarkably improved with increased HAD content. Moreover, this work provides an approach for preparing plant-derived semi-aromatic copolyamides PA10T/6 T, and these copolyamides exhibit outstanding processing performances, wider processing temperature range, high thermal stability, adjustable mechanical characteristics, and excellent comprehensive properties.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
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