Preparation and properties of colloidal silica-filled natural rubber grafted with poly(methyl methacrylate)

Thi, Thuong Nghiem; Van, Huong Dao; Hong, Ha Cao; Ha, Hanh Nguyen Thi; Hayati, Yusof Nurul; Kawahara, Seiichi

doi:10.1007/s00289-021-03786-8

Cited by 9 publications

(8 citation statements)

References 25 publications

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“…Moreover, the results show that the wear resistance was improved by 22%, 57.62, and 68.67% by adding 0.3, 0.9, and 1.2 DSNP wt%, respectively. These results agree with those reported by Elkhouly et al 29 , 36 , 37 , who found that good resistance wear can be obtained for polymers with date-seed nano-powder of 30 nm in nanoparticle diameter. In addition, the results demonstrate that the wear resistance was improved to 19.5%, 55.62, and 61.66% by adding 0.3, 0.9, and 1.2 TiO 2 NP wt%, respectively.…”

Section: Resultssupporting

confidence: 93%

“…Among the many advantages of using fillers such as date seed nanoparticles (DSNP) are their low density, cost savings, and mechanical qualities throughout the manufacturing process (DSNP). Because of their intrinsic qualities, such as high chemical inertness and outstanding mechanical properties 20 , 29 , date seed particle reinforcements are considered attractive for manufacturing polymer matrix composites 30 . According to Elkhouly et al 31 , the mechanical parameters of polymer composites augmented with DSNP fillers and two inorganic fillers were compared.…”

Section: Introductionmentioning

confidence: 99%

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An investigated organic and inorganic reinforcement as an effective economical filler of poly (methyl methacrylate) nanocomposites

Elkhouly

Ali

El-Sheikh

et al. 2022

Sci Rep

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Polymer matrix composites have garnered the interest of the dentistry sector. Nano-fillers are frequently used as reinforcements in these composites to enhance their characteristics. Poly (methyl methacrylate) was filled with date seed nanoparticles (DSNP) and titanium oxide nanoparticles (TiO2NP). In this work, two nanofillers (DSNP and TiO2NP) were analyzed using Fourier-transform infrared spectroscopy (FTIR). In addition, the features of the PMMA-nanofiller composite were experimentally evaluated via compression, micro-hardness, wear rate (WR), and coefficients of friction (µ) testing. Utilizing a scanning electron microscope (SEM), the microstructure of the PMMA-DSNP composite was examined. The results of the experiments on the nanocomposites demonstrated that the elastic modulus, microhardness, wear resistance, and friction resistance increased with an increase in DSNP content to 1.2 wt, in comparison to TiO2NP at the same concentration. Finally, according to the guidelines, the ideal weight was determined to be 1.2 wt%, filler in the form of DSNP, at a normal load of 10 N.

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Section: Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

An investigated organic and inorganic reinforcement as an effective economical filler of poly (methyl methacrylate) nanocomposites

Elkhouly

Ali

El-Sheikh

et al. 2022

Sci Rep

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“…Figure 8 presents the contact angle of the M0.50/P30-DPNR and M0.50/P30-DPNR/silica composites with various silica contents. The contact angle of DPNR was reported in the literature to be about 96.0° [ 42 ]. As can be seen from the result, the contact angle of M0.50/P30-DPNR was 20.2°, which was lower than that of DPNR.…”

Section: Resultsmentioning

confidence: 99%

Preparation of Crosslinked Poly(acrylic acid-co-acrylamide)-Grafted Deproteinized Natural Rubber/Silica Composites as Coating Materials for Controlled Release of Fertilizer

et al. 2023

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The crosslinked poly(acrylic acid-co-acrylamide)-grafted deproteinized natural rubber/silica ((PAA-co-PAM)-DPNR/silica) composites were prepared and applied as coating materials for fertilizer in this work. The crosslinked (PAA-co-PAM)-DPNR was prepared via emulsion graft copolymerization in the presence of MBA as a crosslinking agent. The modified DPNR was mixed with various contents of silica (10 to 30 phr) to form the composites. The existence of crosslinked (PAA-co-PAM) after modification provided a water adsorption ability to DPNR. The swelling degree values of composites were found in the range of 2217.3 ± 182.0 to 8132.3 ± 483.8%. The addition of silica in the composites resulted in an improvement in mechanical properties. The crosslinked (PAA-co-PAM)-DPNR with 20 phr of silica increased its compressive strength and compressive modulus by 1.61 and 1.55 times compared to the unloaded silica sample, respectively. There was no breakage of samples after 80% compression strain. Potassium nitrate, a model fertilizer, was loaded into chitosan beads with a loading percentage of 40.55 ± 1.03% and then coated with the modified natural rubber/silica composites. The crosslinked (PAA-co-PAM)-DPNR/silica composites as the outer layers had the ability of holding water in their structure and retarded the release of fertilizer. These composites could be promising materials for controlled release and water retention that would have potential for agricultural application.

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“…There were no significant changes observed in comparison to NR, implying the good compatibility of two components, NR and PMMA. 34 If NR-PMMA copolymers were incompatible to each other, some phase separation and irregular surface would be detected based on the previous report. 35 3.1.4.…”

Section: Effects Of the Types Of Initiators And The Raft Process In T...mentioning

confidence: 99%

Emulsion Polymerization of PMMA onto Natural Rubber

Lease,

Sahin,

Andou

2023

ACS Appl. Eng. Mater.

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PMMA-grafted natural rubber copolymers (NR-PMMA) are successfully synthesized by using emulsion polymerization. The effects of the two types of the radical initiator with or without a reversible addition-fragmentation chain transfer (RAFT) agent to polymerize methyl methacrylate (MMA)-grafted natural rubber are elucidated. In this work, a dibenzoyl peroxide (DBP) initiator shows a higher grafting rate (24.63%) as compared to a 2,2′-azobis(isobutyronitrile) (AIBN) initiator without a RAFT agent. The structural characterization of the obtained copolymers is conducted by proton nuclear magnetic resonance ( 1 H NMR) and attenuated total reflectance/Fourier transform infrared (ATR-FTIR). According to the GPC analysis, RAFT in the emulsion polymerization process is difficult to happen in this current system as a high PDI (4.72) and a low molecular weight (3.43 × 10 5 ) are acquired. Further investigation is needed to allow RAFT in the emulsion process to proceed more rapidly. The changes in the glass transition temperature (T g ) and degradation temperature (T d ) confirmed the improvement of the thermal properties of the graft copolymers. In addition, the mechanical properties of NR-PMMA copolymers increased with an increase of the grafting efficiency of PMMA. Thus, this approach is an effective way to produce natural rubber-based products.

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Preparation and properties of colloidal silica-filled natural rubber grafted with poly(methyl methacrylate)

Cited by 9 publications

References 25 publications

An investigated organic and inorganic reinforcement as an effective economical filler of poly (methyl methacrylate) nanocomposites

An investigated organic and inorganic reinforcement as an effective economical filler of poly (methyl methacrylate) nanocomposites

Preparation of Crosslinked Poly(acrylic acid-co-acrylamide)-Grafted Deproteinized Natural Rubber/Silica Composites as Coating Materials for Controlled Release of Fertilizer

Emulsion Polymerization of PMMA onto Natural Rubber

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