Mechanical properties of carbon fiber/polypropylene composites using carboxylic-acid-modified polypropylene without and with oxazoline-containing polymer coated on carbon fiber

Yokoi, Daichi; Takamura, Masumi; Takahashi, Tatsuhiro

doi:10.1016/j.compscitech.2023.110213

Cited by 9 publications

(4 citation statements)

References 36 publications

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“…This indicates that as-received MgO contains a significant amount of adsorbed water. In the absence of MgO, the initial mass loss of PP/EPDM recorded at around 300 °C is attributed to one-step thermal degradation processes of both PP and EPDM [47,48]. As the MgO is added to PP/EPDM, the hydroxyl groups translate into a sharp FTIR absorption band at 3696/cm, especially with increasing amounts of MgO.…”

Section: Discussionmentioning

confidence: 99%

“…Since the addition of MAH worsens MgO dispersion at low MgO loadings, this is attributed to excessive MAH used for modification purposes, where the complex SEM morphology of the nanocomposites becomes dominated by excessive MAH. MAH, having reactive sites called carboxylic acid groups, presumably complicates the structure of the materials through the reaction of hydrogen groups, e.g., hydroxyl functional groups [47]. As the amount of MgO increases to 3 wt%, MAH's reactions in modifying MgO and PP/EPDM interactions become more effective [47].…”

Section: Discussionmentioning

confidence: 99%

“…MAH, having reactive sites called carboxylic acid groups, presumably complicates the structure of the materials through the reaction of hydrogen groups, e.g., hydroxyl functional groups [47]. As the amount of MgO increases to 3 wt%, MAH's reactions in modifying MgO and PP/EPDM interactions become more effective [47]. The equilibrium strength of polarity in MAH and MgO results in MAH easily interacting with MgO, thus facilitating interfacial bonding between MgO and PP/EPDM [48].…”

Section: Discussionmentioning

confidence: 99%

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Effects of nanomagnesia and polypropylene-graft-maleic anhydride on the dielectric breakdown properties of polypropylene/ethylene propylene diene monomer blend

Johari,

Lau,

Abdul Malek

et al. 2024

Phys. Scr.

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Thermoplastic polypropylene (PP) has garnered a significant attention in power cable insulation research because of its exceptional thermal tolerance and dielectric properties. Due to its poor impact strength at room temperature, PP has been blended with various elastomers, including ethylene-propylene-diene monomer (EPDM), to improve the mechanical stiffness of the final material. This, however, comes with compromised dielectric properties of the material. Recently, the addition of nanofillers to polymers has demonstrated promising properties that can be tailored for various dielectric applications, provided that nanofiller and polymer interactions are appropriately formulated. Nevertheless, the effect of nanostructuration in PP/elastomer blends, especially from the perspective of dielectrics, have yet to be systematically explored. In the current work, magnesia (MgO) nanofiller is added to a model PP/EPDM blend system to determine the effect of MgO on the breakdown properties of PP/EPDM. The results show that adding 0.5 wt% of MgO to PP/EPDM reduces the AC and DC breakdown strengths by 7% and 16%, respectively. As the amount of MgO increases to 3 wt%, the AC and DC breakdown strength reduces further by 25% and 29%, respectively. Significantly, appropriate modification of the nanocomposites with polypropylene-graft-maleic anhydride (PP-g-MAH) can result in 5% higher breakdown strength of the nanocomposites with respect to comparable nanocomposites without modification. The mechanisms surrounding these breakdown effects are discussed with the aid of materials structure interpretations. Overall, the results demonstrate that appropriate modification of nanocomposites with PP-g-MAH is crucial in tailoring breakdown properties of PP blend nanocomposites.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Effects of nanomagnesia and polypropylene-graft-maleic anhydride on the dielectric breakdown properties of polypropylene/ethylene propylene diene monomer blend

Johari,

Lau,

Abdul Malek

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

show abstract

“…Therefore, to better leverage the advantages of the material, it is necessary to consider better bonding between multiphase interfaces. PP-g-MAH played the following role as a 1 compatibilizer: on the one hand, the maleic anhydride on its chain segment underwent a chemical reaction with the CF surface, which may be explained by the small amount of oxygen-containing functional groups such as carbonyl (-C=O) or hydroxyl (-OH) remaining on the untreated CF surface [36]. On the other hand, the PP part of PP-g-MAH fused with the substrate R-PP, and it is interesting that the short-branched chain structure of POE was α-Olefins, while PP was a typical α-Olefins; therefore, PP-g-MAH is more likely to fuse with POE simultaneously, and CF is fully integrated with R-PP/POE.…”

Section: Mechanical and Surface Profilementioning

confidence: 99%

Carbon Fiber Reinforced Recycled Polypropylene/Polyolefin Elastomer Composites with High Mechanical Properties

Wei,

Abdurexit,

Jamal

et al. 2024

Polymers

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The treatment of waste plastics has gradually become a hot topic in the current scientific community. In response to the needs for high-impact performance R-PP-based composites, carbon fiber (CF)-reinforced polyolefin elastomer (POE)/recycled polypropylene (R-PP) composite (CF/POE/R-PP) was prepared by the mechanical blending method, and its mechanical and thermal properties were systematically studied. It was found that the CF could effectively improve the bending and notch impact strength as well as enhance the thermal stability of POE/R-PP. Furthermore, a stable and dispersed composite interface formed by the combination of maleic anhydride-grafted polypropylene (PP-g-MAH) with the surface of CF and the fusion alkyl chains in R-PP and POE further enhanced the CF’s reinforcing effect. As a result, the addition of 9 wt.% CF successfully improved the heat resistance of the composite material, and the residual carbon content increased by 97.84% after sintering. The composite toughening of POE and CF effectively improved the impact strength of the composite material, with a maximum increase of over 1000%. This study ultimately resulted in a high-impact-resistant composite material.

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Self‐emulsifying anionic polyester sizing agents for enhancing the interfacial and mechanical properties of carbon fiber/vinyl ester resin composites

Geng,

Wang,

Niu

et al. 2024

J of Applied Polymer Sci

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With the increasing emphasis on environmental protection, there is a growing focus on the synthesis of water‐solvent self‐emulsifying sizing agents. In this study, five types of anionic polyester sizing agents with varying molecular weights were synthesized to explore the effect of molecular weight on the interfacial bonding strength of carbon fiber (CF) reinforced vinyl resin composites. The results demonstrated that the molecular weights of the synthesized sizing agents were precise; the particles in the sizing agents were nanometer‐sized, monodisperse, and exhibited high thermal stability. When the molecular weight was 8000, it exhibited optimal wettability for CF, leading to a substantial improvement in the interlaminar shear strength, reaching 71.8 MPa, which represents a significant increase of 22.7% compared with commercial CFs (CFF). Additionally, the interfacial shear strength was maximized at 13.23 MPa, which was significantly increased by 14.2% compared with CCF. These significant improvements in surface properties and mechanical performance were attributed to the excellent wettability of the CF surface, effective spreading performance of the sizing agent, the presence of double bonds in the sizing agent facilitating reactions with free radicals on the CF surface, and the residual double bonds further undergoing curing with the vinyl resin, promoting the reinforcement of interface bonding.

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Mechanical properties of carbon fiber/polypropylene composites using carboxylic-acid-modified polypropylene without and with oxazoline-containing polymer coated on carbon fiber

Cited by 9 publications

References 36 publications

Effects of nanomagnesia and polypropylene-graft-maleic anhydride on the dielectric breakdown properties of polypropylene/ethylene propylene diene monomer blend

Effects of nanomagnesia and polypropylene-graft-maleic anhydride on the dielectric breakdown properties of polypropylene/ethylene propylene diene monomer blend

Carbon Fiber Reinforced Recycled Polypropylene/Polyolefin Elastomer Composites with High Mechanical Properties

Self‐emulsifying anionic polyester sizing agents for enhancing the interfacial and mechanical properties of carbon fiber/vinyl ester resin composites

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