Microfibrillation structure evolution and mechanical properties of MS@PMHNTs reinforced polymethyl methacrylate composite fiber

Song, Ling; Ji-cheng, Wang; Yan, Xiaofei; Cui, Zhonglan; Li, Jiawei; Qi, Dongming

doi:10.1016/j.coco.2022.101108

Cited by 5 publications

(3 citation statements)

References 39 publications

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“…In this case, the encapsulated fillers may be released or migrate to the interface thus lead to decline of mechanical properties of composites, as reported in previous literature. 29 Therefore, crosslink density and mass ratio were evaluated and optimized in this work to obtain highly oriented nanofibrils, as shown in Figure S2, S3. The appropriate mass ratio was 20:80 and gel rate for PAcr was selected around 43%, which means the mol number of crosslinker was 6.33 Â 10 À4 mol.…”

Section: Mechanical Properties Of Pmma/ Pacr Composite Fibersmentioning

confidence: 99%

In situ nanofibrillar composite fiber: A model system for understanding the structural evolution of crosslinked nanofibrils

Wang

Zhang

et al. 2023

J of Applied Polymer Sci

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In situ formed nanofibrils, which are formed from the deformation of dispersed phase polymer during the shearing/stretching process, offer exciting opportunities for large scale manufacture of materials with high strength and toughness. However, how the topological structure, especially crosslinking network structure of dispersed phase polymer, affects the structural evolution of nano/microfibrils is remaining unclear. Here, the nanofibrillar morphology of nanofibrillar composite fibers is manipulated via controlling the crosslinking network structure of dispersed phase. By changing the length of crosslinker and mol ratio of crosslinkers, the diameter of nanofibrils can be controlled. The rheological property of the crosslinked microspheres and corresponding morphology of in situ formed nanofibrils confirm that the inhomogeneous crosslinking network shows lower storage modulus and consistency coefficient, leading to higher deformation adaptability of crosslinking network and smaller diameter of the nanofibrils. The distribution of nanofibrils along the axial direction of composite fiber greatly improved the tensile strength and toughness of composite fiber to 74 MPa and 719 MJ/m3, which are 45% and 180% increasement compared with the counterpart pure PMMA fiber. The findings in current study provide a new strategy to control the nanofibrillar morphology by increasing the heterogeneity of crosslinking network structure of the dispersed phase polymer.

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Section: Mechanical Properties Of Pmma/ Pacr Composite Fibersmentioning

confidence: 99%

In situ nanofibrillar composite fiber: A model system for understanding the structural evolution of crosslinked nanofibrils

Wang

Zhang

et al. 2023

J of Applied Polymer Sci

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“…The Mg(OH) 2 dispersant was prepared by adding B phase to A phase at the design certain rate. 24,26 A certain amount of monomer (mass ratio of St to MMA is 8:2), BPO, PEGDMA-550, and PMHNTs (All mass fractions in this paper are based on the total amount of monomers) were dispersed uniformly by the ultrasound. The monomer dispersion was added to the Mg(OH) 2 dispersant, sheared at 10000 rpm for 5 min, poured into a jacketed reactor, reacted at 70 C for 12 h and matured at 80 C for 1 h. The reaction product was washed with dilute hydrochloric acid to neutral, and magnesium hydroxide particles were removed to obtain poly (styrene-methyl methacrylate) microspheres coated with PMHNTs (PSM@PMHNTs).…”

Section: Preparation Of Psm@pmhnts Copolymer Microspheresmentioning

confidence: 99%

Preparation of poly (styrene‐methyl methacrylate)@grafted halloysite microspheres and the properties of its composite fibers

Yan

Song

Zhu

et al. 2022

J of Applied Polymer Sci

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It has become a hotspot that microfibrils with a high aspect ratio have a good reinforcement effect on the composite fibers. To prepare the micro‐fibrillation composite fibers with excellent performance and good dispersity, poly (styrene‐methyl methacrylate)@grafted halloysite nanotubes(PSM@PMHNTs) microspheres were prepared by suspension polymerization method, and the PSM@PMHNTs reinforced composite fibers were prepared by simple blending with polymethylmethacrylate (PMMA). The structure and mechanical properties of the composite fibers were studied by transmission electron microscopy, scanning electron microscopy, dynamic thermo‐mechanical analysis, and universal material testing machine. The results showed that polystyrene grafted halloysite nanotubes (PMHNTs) had good hydrophobicity and were successfully embedded in poly (styrene‐methyl methacrylate) (PSM). The mechanical performance of microfibril composite fiber with PSM@PMHNTs is better when compared that with PMHNTs and PSM, and the elongation at break of the composite fiber has dramatically increased by 120.90% compared to that of pure PMMA. In addition, the mechanical properties of the composite fibers were increased firstly and then decreased with the increase of PMHNTs contents and draft ratios, while the glass transition temperature of the composite fibers had no obvious changes. The composite fiber has the best mechanical properties when the content of PMHNTs is 1.0 wt% and the draft ratio is 6, and the tensile strength and elongation at break were 26.94% and 256.36% higher than that of pure PMMA, respectively.

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“…High-performance ceramics, composite materials, and high-temperature, high-pressure alloys are being considered for extruder heads to enhance their durability and performance. Future research and development in extruder heads will focus on improving their performance, reducing energy consumption, and minimizing environmental impact [ 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 ]. In conclusion, the study and development of extruder heads are crucial for enhancing production efficiency, product quality, and sustainability.…”

Section: Introductionmentioning

confidence: 99%

Effects of Different Die Metals on the Performance and Friction and Wear of Composite Materials during the Extrusion Process

Liu,

Wang

2023

Polymers

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Extrusion technology is widely utilized in the rubber processing industry, with the extruder serving as the core equipment. As mixed rubber enters the extruder, it undergoes conveyance and plasticization, ultimately forming specific shapes and dimensions upon extrusion. The extruder head is a crucial component, playing a key role in achieving the final product’s required size and shape. Factors such as its structure, materials, and manufacturing processes significantly impact the efficiency, product quality, and sustainability of the extrusion process. However, prolonged operation leads to severe wear of the extruder head, adversely affecting rubber product quality. Additionally, extruder head processing poses challenges, with maintenance and repair being complex procedures. Therefore, exploring a wear-resistant, long-lasting metal material for the extruder head without compromising mixed rubber performance is essential. This study focuses on severely worn extruder head metal materials, comparing wear levels after friction with STELLITE 6 alloy, Hastelloy C-276 alloy, 38CrMoAlA, and tungsten carbide with composite rubber. Results show that compared to the NR/BR composite material after Hastelloy C-276 alloy friction, rubber Payne effect increased by 4.4% (38CrMoAl), 3.2% (STELLITE 6), and 4.6% (tungsten carbide). Similarly, rubber dispersion decreased by 9.4% (38CrMoAl), 4.7% (STELLITE 6), and 9.8% (tungsten carbide). Rolling resistance increased by 18.1% (38CrMoAl), 16% (STELLITE 6), and 23.4% (tungsten carbide). Friction coefficient increased by 3.5% (38CrMoAl), 2.8% (STELLITE 6), and 4.3% (tungsten carbide). Wear volume increased by 39.3% (38CrMoAl), 45.3% (STELLITE 6), and 48.9% (tungsten carbide). Specifically, using Hastelloy C-276 alloy as the extruder head metal material yields the best NR/BR composite material dispersion, highest ten times tear strength, excellent anti-wet skid resistance, and minimum rolling resistance. Conversely, using the other alloys results in varying reductions in the physical and mechanical properties of NR/BR composite materials. This research is crucial for improving rubber product quality and extending extruder head lifespan.

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Microfibrillation structure evolution and mechanical properties of MS@PMHNTs reinforced polymethyl methacrylate composite fiber

Cited by 5 publications

References 39 publications

In situ nanofibrillar composite fiber: A model system for understanding the structural evolution of crosslinked nanofibrils

In situ nanofibrillar composite fiber: A model system for understanding the structural evolution of crosslinked nanofibrils

Preparation of poly (styrene‐methyl methacrylate)@grafted halloysite microspheres and the properties of its composite fibers

Effects of Different Die Metals on the Performance and Friction and Wear of Composite Materials during the Extrusion Process

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