Synthesis and characteristics of thermoplastic elastomer based on polyamide‐6

Here, we report the successful preparation of PA6/GO composite fibers through in situ polymerization and the melting spinning method. The results suggest that graphene has induced only minor changes on the relative viscosity yet exhibits significant effects on the crystallization characteristics. The SEM images of the fibers have shown several expended borders as a consequence of graphene addition. The maximum strength of the composite fibers (5.3 cN/dtex) has been reached 0.05 wt % graphene added to the system; the draw ratio was equaled to 3.8. Compared to the neat PA6 fiber, the fibers with graphene displayed superior creep resistance features; the creep rate constant was 0.38 at a 0.05 graphene concentration, with a draw ratio of 3.5. The approach employed in this research paves the way towards PA6/graphene nanocomposites have been prepared through in situ polymerization using caprolactam and graphene oxide/water pulp as starting materials. In situ polymerization approach facilitated a superior interaction between PA6 and graphene. Compared to graphene oxide powder, the graphene oxide in water pulp has prevented the agglomeration when added to the caprolactam melt, leading to its enhanced dispersion within the system. PA6/graphene as‐spun fiber has been produced by the mean of melt‐spinning strategy using a melt‐spinning machine, obtaining products with different draw ratios after drawing at 120 °C. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45834.

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“… Relative viscosity of composites measured at 25 °C in 96% sulfuric acid solution using a Ubbelohde viscometer …”

Section: Resultsmentioning

confidence: 99%

Preparation and characterization of graphene reinforced PA6 fiber

Tang

Chen

et al. 2017

J of Applied Polymer Sci

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“…[1][2][3][4][5] The polyether soft segment of the low glass transition temperature (T g ) or low melting temperature (T m ) will endow the PEBA with the ductility or elasticity even at low temperature [6][7][8] ; the polyamide hard segment of high T m can ensure the mechanical strength and the physical cross-linking even at high temperature. [9][10][11] Based on this, the PEBA has the potential application in such fields as clothing industry, membrane materials, and automobile industry. [12][13][14] The polyamide-based multiblock copolymers have been synthesized based on the different combination of reactive groups in the polyether block and polyamide block by solvent polymerization.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of a high performance polyamide‐6 elastomer based on poly(ether‐block‐amide) multiblock copolymer by reactive processing in torque rheometer

Yuan

et al. 2017

Adv Polym Technol

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The polyamide-6 based poly(ether-block-amide) (PEBA) multiblock copolymers were reactively prepared in typical processing equipment, torque rheometer. The reactive processing conditions of PEBA were discussed in details on the base of the tensile strength as the main quantization parameter and the torque rheological curves.The optimized reaction temperature, reaction time, and rotational speed were 150°C, 10 min, and 40 rpm respectively. The chemical structure, tensile properties, thermal transition, thermal stability, water absorption, and solubility in organic solvents of PEBA prepared in optimized reaction conditions were characterized by Fourier transform infrared spectroscopy, tensile testing, differential scanning calorimetry, thermogravimetric analysis, and soaking testing in water and organic solvents. The tensile strength and elongation at break of PEBA are 35.9 MPa and 580% respectively. The glass transition temperature and melting temperature of soft segment of PEBA are −50 and 15°C, respectively; the glass transition temperature and melting temperature of hard segment of PEBA are 50 and 140°C respectively. Meanwhile, the PEBA has low water absorption, robust organic solvent resistance, and good thermal stability. The optimization process of PEBA will give the deep understanding of reactive processing of polymer materials. K E Y W O R D Scondition optimization, environmentally friendness, multiblock copolymer, reactive preparation, torque rheometer

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“…Lots of interests in TPEs have been focusing on the commercial field as well as with scientific and applied researches [1][2][3][4][5][6][7][8][9][10]. Ionomers are polymers with a small mole fraction of ionic groups bonded to the polymer backbone [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%