P(N‐phenylmaleimide‐alt‐styrene) as a heat‐resistant agent in the application of nylon 6

Liu, Yufei; He, Min; Yan, Wei; Zhang, Daohai; Zhao, Qian; Qin, Shuhao; Yu, Jie

doi:10.1002/app.47689

Cited by 10 publications

(9 citation statements)

References 22 publications

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“…Furthermore, referring to the previous studies, [ 45 ] the heat‐treatment would change the crystallinity of the semi‐crystalline composites so that the mechanical properties were influenced. The crystallinity could be calculated as follows [ 46 ] :

X_{c} = \frac{italicΔH}{φ \times Δ H^{°}} \times 100 %

where ΔH was the melting enthalpy of samples. The ΔH ° was the melting enthalpy of a 100% crystalline PA material (which was taken as 230 J/g [ 47 ] ).…”

Section: Resultsmentioning

confidence: 99%

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Aheat‐press‐treatmentmethod for3Dprintedthin‐walledcomposite structures with improved interfacial and compressive properties

et al. 2022

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3D printed thin-walled composite structures suffered from the inherent low interlayer bonding, which limited the mechanical properties and influenced compressive behaviors. This work focused on effects of the postprocess on interfacial properties and compressive behaviors of thin-walled composite structures made by fused deposition modeling. To improve the interfacial properties, a heat-press-treatment method was proposed. Compared to the nontreated thin-walled structures, the energy absorption (EA) of the heatpress-treated structures increased from 61 to 90 J. It was found that both heat and pressure were indispensable conditions. The heat-press-treated thinwalled structures presented a stable progressive collapse mode, while the heattreated structures without pressure collapsed in an unstable buckling manner due to the brittle fractures. The heat-press-treated structures presented higher crushing force efficiency (CFE) and EA than the heat-treated structures. The difference was more significant with the increase of the treatment temperature from 50 to 200 C. Finally, the mechanisms of the improvement by the heatpress-treatment on interfacial bonding were analyzed. The findings of this research offered new insights on improving the EA for 3D printed thin-walled composite structures.

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X_{c} = \frac{italicΔH}{φ \times Δ H^{°}} \times 100 %

where ΔH was the melting enthalpy of samples. The ΔH ° was the melting enthalpy of a 100% crystalline PA material (which was taken as 230 J/g [ 47 ] ).…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, referring to the previous studies, [45] the heat-treatment would change the crystallinity of the semi-crystalline composites so that the mechanical properties were influenced. The crystallinity could be calculated as follows [46] :…”

Section: Heat-press-treatment Mechanismmentioning

confidence: 99%

Aheat‐press‐treatmentmethod for3Dprintedthin‐walledcomposite structures with improved interfacial and compressive properties

et al. 2022

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“…The equation is given by X c = ∆H c /(ω × ∆H m 0 ), where ∆H c is the crystallization enthalpy of the samples (J/g); ∆H m 0 is the enthalpy value of the melting of a 100% crystalline form of PA6, which is 230 J/g; 35 ω is the weight percentage of PA6 in the blend.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and application of new macromolecular hindered phenol antioxidants of polyamide 6

Jiang

Liu

Zou

et al. 2021

J of Applied Polymer Sci

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The two macromolecular antioxidants, P(3,5-di-tert-butyl-4-hydroxy cinnamic acid-alt-N-phenylmaleimide) (PCN) and P(3-butene-1-yl-3,5-ditert-butyl À4-hydroxyphenyl propionate-alt-N-phenylmaleimide) (PPN) were designed and synthesized via free radical copolymerization. The structures of the resulting PCN and PPN antioxidants were characterized by Fourier transform infrared spectroscopy, nuclear magnetic resonance spectroscopy ( 1 H NMR), and gel permeation chromatography. In addition, the effect of the two macromolecular antioxidants on the thermal oxidation aging resistance of polyamide 6 (PA6) was studied. According to the analysis of differential scanning calorimetry, thermogravimetric analysis, dynamic mechanical analysis, dynamic viscosity, and the mechanical property of PA6 and its blends, these two types of macromolecular antioxidants protected the molecular chain of PA6 from breaking, protected the crystallization of PA6 and maintained the stability of PA6 crystal form, improved the activation energy of thermal degradation and thermal stability of PA6, enhanced the strength and elasticity of PA6 and maintained the mechanical properties of PA6 during aging to a certain extent.

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“…However, its disadvantages, such as poor heat-deflection temperature (HDT: 50 °C for neat PLA) and slow crystallization rate, limit its application [ 8 , 9 , 10 , 11 , 12 , 13 ]. HDT is a crucial physical quantity used to characterize the heat resistance of polymeric materials [ 14 , 15 ]. Therefore, extensive research has been conducted to improve the heat resistance of PLAs [ 16 ] ( Table 1 ).…”

Section: Introductionmentioning

confidence: 99%

Crystallization Morphology Regulation on Enhancing Heat Resistance of Polylactic Acid

et al. 2020

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To expand the use of polylactic acid (PLA) in high-temperature environments, crystallization morphology regulation was studied to enhance the heat resistance of PLA. PLA crystallinity was controlled using heat treatment and nucleating agent (zinc phenylphosphonate, brand TMC). The heat deflection temperatures of PLAs with same crystallinities considerably varied using different treatments. The crystallization morphology of PLA (4032D) and PLA/TMC composites was studied using X-ray diffraction (XRD) and polarized optical microscopy. XRD test results show that TMC can improve the crystallization rate and heat treatment can enhance the crystallinity and thickness of PLA, suggesting that the crystallization morphology improved after heat treatment. Nucleating agents can increase the crystallinity of PLA but cannot improve its crystallization morphology. The findings indicate that at the same crystallinity, PLAs exhibit improved crystallization morphology and high heat resistance; these results can provide guidance for improving the heat resistance of PLAs and facilitate the design of new nucleating agents.

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P(N‐phenylmaleimide‐alt‐styrene) as a heat‐resistant agent in the application of nylon 6

Cited by 10 publications

References 22 publications

Aheat‐press‐treatmentmethod for3Dprintedthin‐walledcomposite structures with improved interfacial and compressive properties

Aheat‐press‐treatmentmethod for3Dprintedthin‐walledcomposite structures with improved interfacial and compressive properties

Synthesis and application of new macromolecular hindered phenol antioxidants of polyamide 6

Crystallization Morphology Regulation on Enhancing Heat Resistance of Polylactic Acid

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