A Comparative Study of the Structure and Mechanical Properties of Uniaxially and Biaxially Stretched PA6-66/Montmorillonite Films

Liu, Xiaochao; Liu, Yuejun; Yang, Jian; Yi, Zhuwu; Long, Minnan; Zheng, Wei; Yang, Jun; Chen, Xi

doi:10.1166/nnl.2018.2618

Cited by 6 publications

(1 citation statement)

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“…The Toyota Company produced a nylon 6/clay nanocomposite, finding a significant enhancement in modulus and strength with the addition of clay (Kojima et al, 1993). The most commonly used clays include saponite, montmorillonite (Liu et al, 2018), and hectorite. Figure 1A shows a schematic of biaxial stretching modes including simultaneous and sequential biaxial stretching.…”

Section: Polymer/clay Nanocompositesmentioning

confidence: 99%

Biaxial Stretching of Polymer Nanocomposites: A Mini-Review

et al. 2021

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Polymer nanocomposites with excellent physical and chemical properties and multifunctional performance have been widely used in various fields. Biaxial stretching is not only an advanced film manufacturing process, but also a deformation mode in other processing methods such as blow film extrusion and thermoforming. In recent research, high-performance polymer nanocomposites have been fabricated via sequential and simultaneous biaxial stretching. This fabrication method enhances the mechanical properties, optical performance, and thermal properties of polymer nanocomposites by changing the structure or orientation of materials during the process of stretching. Therefore, it is particularly suitable for use in optimizing material performance and preparing thin films with excellent properties in the packaging industry. With the emergence of new materials and technologies, polymer nanocomposites prepared by biaxial stretching have demonstrated multifunctional properties and their range of applications has further expanded. In this mini-review, the effect of biaxial stretching on the structure and properties of nanocomposites based on various nanofillers is discussed and applications are summarized. In addition, the challenges and future prospects of this technology are analyzed. The presented work will be beneficial for improving preparation processes and improving future research for the production of high-performance polymer nanocomposites.

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Section: Polymer/clay Nanocompositesmentioning

confidence: 99%

Biaxial Stretching of Polymer Nanocomposites: A Mini-Review

et al. 2021

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Effects of the biaxial orientation on the mechanical and optical properties and shrinkage of polyamide 6‐66–montmorillonite–nanosilica nanocomposite films

Liu

Yang

et al. 2019

J of Applied Polymer Sci

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Polyamide 6-66 (PA6-66)-montmorillonite (MMT)-nanosilica (NS) nanocomposite films were fabricated through a cast film process and then biaxially stretched on a laboratory stretcher. Uniaxial or biaxial stretching induced the elongated conformation of MMT and NS. The b axis of the α crystals and the amorphous phase were revealed to align along the machine direction (MD) after stretching, with the uniaxial orientation playing a more significant role. Furthermore, the crystallinity of PA6-66 stretching increased with the stretching ratio. Uniaxial stretching gave rise to a significantly enhanced tensile strength along the MD, whereas it slightly decreased the mechanical properties along the transverse direction (TD). In contrast, the films subjected to biaxial stretching exhibited more balanced mechanical properties. Uniaxial and biaxial stretching led to decreased transmittance and increased haze in the PA6-66-MMT-NS films; this could have been due to the elongated nanostructure of the two nanofillers, which inhibited the transmission and facilitated the scattering of visible light. The thermal shrinkage of the films increased with increasing stretching ratio, and the biaxially oriented films presented nearly equal shrinkage in the MD and TD. The addition of nanofillers decreased the shrinkage attributed to the mobility inhibition of the polymer chains during heating.

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The linear tearing properties of biaxially oriented PA6/MXD6 blending films

Lin

Hao

Liu

et al. 2020

J of Applied Polymer Sci

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The main purpose of this work was to investigate the linear tearing properties of PA6/MXD6 films prepared by simultaneous biaxial stretching. The compatibility between PA6 and MXD6 and the thermal properties of the PA6/MXD6 composites were also investigated. The results showed that the tearing deviation of the blending films decreased from 100 to 3.8% when the MXD6 blend ratio increased from 0 to 25%, but the deviation increased when the MXD6 blend ratio continue to increase. It means that the PA6/MXD6 films with addition of 25 wt% MXD6 exhibited the best linear tearing properties. The differential scanning calorimetry results revealed that the addition of MXD6 reduced the melting temperature from 227.5 to 224.8°C and crystallization temperature of PA6 from 179.3 to 175°C due to the benzene ring structure of MXD6. The dynamic mechanical analysis results indicated that MXD6 exhibits favorable compatibility with PA6. In addition, it was found that the barrier properties of the biaxially oriented PA6/MXD6 films were extremely improved with the increase of MXD6 content.

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A Comparative Study of the Structure and Mechanical Properties of Uniaxially and Biaxially Stretched PA6-66/Montmorillonite Films

Cited by 6 publications

References 0 publications

Biaxial Stretching of Polymer Nanocomposites: A Mini-Review

Biaxial Stretching of Polymer Nanocomposites: A Mini-Review

Effects of the biaxial orientation on the mechanical and optical properties and shrinkage of polyamide 6‐66–montmorillonite–nanosilica nanocomposite films

The linear tearing properties of biaxially oriented PA6/MXD6 blending films

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