Preparation of SiO2@EVA core–shell particles via post-emulsification method with polydisperse SiO2 particle sizes and the critical thickness-to-diameter ratio in PA6/SiO2@EVA system

Zou, Mo; Chen, Jingzhi; Wei, Zhaoyang; Lei, Weiwei; You, Jun; Liu, Jie; Zhang, Qunchao; Shi, Dean

doi:10.1016/j.apsusc.2022.156051

Cited by 2 publications

(3 citation statements)

References 35 publications

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“…Toughening modification of PA6 has always been a research hotspot because PA6 is sensitive to notch, which leads to low impact strength. To enhance its toughness, the utilization of tougheners is a common and effective method, such as core-shell particles, [7][8][9][10] rubbers, [11][12][13][14] and thermoplastic elastomers, [15][16][17] but the rigidity of modified PA6 is prone to be compromised. For example, with the addition of polyolefin elastomer-graft-maleic anhydride (POE-MAH), the modified PA6 showed a nearly 11-fold increase in impact strength compared to the original PA6, meanwhile, the yield stress dropped by nearly 50%.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of robust polyamide 6 with local cross‐linked structure via dynamic vulcanization

Ye,

Yuan,

Liu

et al. 2024

Polymer Engineering & Sci

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Polyamide 6 (PA6) is a widely used thermoplastic engineering polymer, and the toughening modification for PA6 is always a main research topic. Meanwhile, the rigidity and heat resistance of PA6 usually deteriorate. To address this conflict, an epoxy compound (EGDE‐GA) was designed and synthesized and used to modify PA6 by dynamic vulcanization in twin‐screw extruder. EGDE‐GA is a linear molecule with a flexible molecular structure, which is favorable to toughening of PA6, and epoxy groups of EGDE‐GA can form local cross‐linked structure to improve the rigidity and retain the heat resistance of PA6. At the loading of 20 wt% of EGDE‐GA, the modified PA6 (PA6/EGDE‐GA 20) exhibited very high elongation at break and notched impact strength, which were increased by 413% and 520%, respectively, compared to those of PA6. The tensile strength was 61.4 MPa, which was higher than that of PA6. The heat deflection temperature remained almost unchanged. The results showed that the modified polymers may possess the high toughness without sacrificing the original rigidity by building the local crosslinked structure using dynamic vulcanization. The findings provide a feasible method for reusing and upcycling PA6 and other polymers with higher value and wider use in the industry.Highlights The polyamide 6 (PA6) is toughened via dynamic vulcanization. The toughness of modified PA6 is increased by 520% compared with pure PA6. The toughened PA6 exhibits higher tensile strength than that of pure PA6. The toughened PA6 maintains its rigidity and heat resistance.

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Section: Introductionmentioning

confidence: 99%

Fabrication of robust polyamide 6 with local cross‐linked structure via dynamic vulcanization

Ye,

Yuan,

Liu

et al. 2024

Polymer Engineering & Sci

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“…The core–shell structure particles have received widespread attention due to different physical and chemical properties of external and internal structures. The preparation of the core–shell structure is a technology of special structure particles developed by seeded emulsion polymerization. , Polymer particles with a core–shell structure can be obtained after different stages of polymerization using the mechanisms of polymer deposition, particle bonding, grafting, and seed surface polymerization. , The advantage of the core–shell structure is the superimposition of shell and core functions, which do not affect each other. For example, Li et al prepared the core–shell latex particles using polyacrylate as a core for film formation and SiO 2 as a shell to improve the weather fastness of the film, which achieved the combination of core and shell functions.…”

Section: Introductionmentioning

confidence: 99%

“…11,12 Polymer particles with a core−shell structure can be obtained after different stages of polymerization using the mechanisms of polymer deposition, 13 particle bonding, 14 grafting, 15 and seed surface polymerization. 16,17 The advantage of the core−shell structure is the superimposition of shell and core functions, which do not affect each other. For example, Li et al 18 prepared the core−shell latex particles using polyacrylate as a core for film formation and SiO 2 as a shell to improve the weather fastness of the film, which achieved the combination of core and shell functions.…”

Section: Introductionmentioning

confidence: 99%

Ink-Jet Printing of Colored Latex Inks with a “Soft” Core–“Hard” Shell Structure

Yang

Yin

Sheng

et al. 2023

ACS Appl. Polym. Mater.

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Colored latex particles (CLPs) as a novel colorant have been widely applied to salt-free dyeing and printing due to their adjustable composition, brilliant colors, excellent durability, and small particle size. In this paper, the effects of glass-transition temperatures (T g) on the filterability of CLP inks were first studied, and the results showed that the CLP inks can be successfully filtered and ejected when the T g’s of CLP inks exceeded 48 °C. Based on our previous research, CLP (T g = 25 °C)-printed fabrics had excellent color fastness and a soft hand feel, while a stiff hand feel occurred with the increase of the T g. Herein, the CLPs with a core–shell structure (CLP@PS) were designed using CLPs (T g = 25 °C) as a “soft” core for ensuring the color fastness of printed fabrics and PS as a “hard” core for ensuring excellent filterability of inks. Transmission electron microscopy and dynamic light scattering indicated that the prepared particles had an obvious core–shell structure, and the particle size was 96 nm. To balance the filterability of inks and color fastness of printed fabrics, the encapsulated thickness was optimized at 20 nm by adjusting the amounts of styrene (St) and 2,2′-azobis(2-methylpropionamidine) dihydrochloride (AIBA). The flow rate and filtration time of CLP@PS inks were 8.9 mL/s, and 11 s, respectively. Finally, the CLP@PS inks were applied to ink-jet printing of cotton fabric. Compared with pigment ink-jet printing, CLP@PS-printed fabrics had a softer hand feel and better rubbing and washing fastness.

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Preparation of SiO2@EVA core–shell particles via post-emulsification method with polydisperse SiO2 particle sizes and the critical thickness-to-diameter ratio in PA6/SiO2@EVA system

Cited by 2 publications

References 35 publications

Fabrication of robust polyamide 6 with local cross‐linked structure via dynamic vulcanization

Fabrication of robust polyamide 6 with local cross‐linked structure via dynamic vulcanization

Ink-Jet Printing of Colored Latex Inks with a “Soft” Core–“Hard” Shell Structure

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