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
·
聚合物化学
✓ 已验证
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
·
高分子化学
✓ 已验证
DOI
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
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）