Regulation on dual-interface of core–shell dispersed phases and mechanical properties of PP blends by rotary evaporation-assisted melt grafted EPDM-g-MAH

Qiu, Biwei; Qi, Pengfei; Qian, Zhongjian; Fang, Wenhang; Zou, Hua; Huang, Xi-ying

doi:10.1016/j.jcomc.2020.100065

Cited by 5 publications

(5 citation statements)

References 50 publications

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“…The peak at 720 cm −1 can be related to in plane swing vibrations of (CH 2 ) n ( n ≥ 5) of polyethylene chain. In comparison with EPDM, EPDM‐ g ‐MA showed distinct peaks at 1783 and 1856 cm −1 that were related to the symmetric and asymmetric stretching vibrations of carbonyl group (CO) 55,56 . Investigating the spectra attentively could prove the fact that the surface area under the two characteristic peaks was higher for 3 phr MA than other MA contents.…”

Section: Resultsmentioning

confidence: 96%

“…In comparison with EPDM, EPDM-g-MA showed distinct peaks at 1783 and 1856 cm À1 that were related to the symmetric and asymmetric stretching vibrations of carbonyl group (C O). 55,56 Investigating the spectra attentively could prove the fact that the surface area under the two characteristic peaks was higher for 3 phr MA than other MA contents. 57 Also, the characteristic peaks of anhydride group in EPDM-g-MA were presented at 1785 and 1856 cm À1 that were related to anhydride carbonyl groups, Figure 2B.…”

Section: Ft-ir Spectroscopymentioning

confidence: 99%

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Silicone rubber/benzoxazine resin‐based nanocomposites: A study on compatibility and thermal stability

Faghihi,

Arefazar,

Khonakdar

et al. 2024

Polymer Engineering & Sci

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In this study, blends of silicone rubber (SR) and benzoxazine (BZ) were prepared accompanied by ethylene propylene diene monomer grafted with maleic anhydride (EPDM‐g‐MA) as the compatibilizing agent. A total of 3 phr MA grafted EPDM showed the most favorable grafting efficiency and relatively lower gel content. Results showed that 8 phr (EPDM‐g‐MA) was the optimal compatibilizer content in the 85/15 SR/BZ blend, which was used for further studies. Morphological studies proved that the greatest reduction in the dispersed droplet size (from 1.32 to 0.23 μm) occurred at this optimal compatibilizer loading (8 phr). The lowest difference between the glass transition temperatures of the blend components was observed at the 8 phr compatibilizer content, which was confirmed by DMTA. The mechanical and curing characteristics of compatibilized and uncompatibilized blends were also studied. The results evinced that the tensile strength of the compatibilized samples was higher than that of the uncompatibilized blends. Thermal studies on the 85/15 SR/BZ blend and nanocomposites containing 1, 3, and 5 phr polyhedral oligomeric silsesquioxane (POSS) nanoparticles revealed that the thermal stability of nanocomposites containing 1 and 3 phr POSS was superior to that of the nanocomposite with 5 phr POSS.

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Section: Resultsmentioning

confidence: 96%

Section: Ft-ir Spectroscopymentioning

confidence: 99%

Silicone rubber/benzoxazine resin‐based nanocomposites: A study on compatibility and thermal stability

Faghihi,

Arefazar,

Khonakdar

et al. 2024

Polymer Engineering & Sci

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show abstract

“…The improved compatibility promotes interpenetration between segments of different components. The molecular segments of POE‐g‐GMA are inserted into the segments of the PA56 matrix and PP phase at the interface for improved compatibility 24 . The movement of PA56 and PP segments at the interfaces is hindered by the amorphous POE‐g‐GMA shell, thus the crystallinity of PA56/CSR composites decreases compared with pure PA56.…”

Section: Resultsmentioning

confidence: 99%

“…The molecular segments of POE-g-GMA are inserted into the segments of the PA56 matrix and PP phase at the interface for improved compatibility. 24 The movement of PA56 and PP seg- The ethylene and octene segments inserted in the PA56 chain, disrupted the isotactic sequences, and introduced defects in the PA56 crystallite. 25,26 Besides, the epoxy groups in GMA could react with the amine groups and carboxyl groups in PA56, restricting the segment movement.…”

Section: Structure Characterization Of Core-shell Toughened Ternary B...mentioning

confidence: 99%

Effects of core‐shell structured rubber on biobased polyamide 56 with stiffness and toughness balance

Zhang

Guo

2022

Polymers for Advanced Techs

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There is great social awareness concerning the use of biobased materials of diminishing the rapid resource depletion and suppressing global warming. The inherent drawbacks of biobased polyamide 56 (PA56) such as poor notched impact strength limit its applications. Core‐shell structured impact modifiers consisting of a soft glycidyl methacrylate grafted poly(ethylene–octene) (POE‐g‐GMA) shell and a rigid polypropylene core were synthesized through the differences in interfacial tensions. Core‐shell rubber (CSR) particles were used to toughen biobased PA56 by melt blending. PA56/CSR composites exhibited a 560% increase in the impact strength, while the tensile performance loss was slight. This desirable toughness of biobased PA56 is attributed to the cavitation that occurred in POE‐g‐GMA shell which can induce shear bands and shear yielding, forming the fibrils. Characterizations, including X‐ray diffraction (XRD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), melt rheological tests, and dynamic mechanical analysis (DMA) were conducted to study the toughening mechanism. The results indicated the massive shearing yielding, the cavitation of the CSR and interfacial debonding between the POE‐g‐GMA and the PP were the principal toughening mechanisms.

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“…Both of them are inversely proportional. In other words, slower deformation over prolonged stress, causes it to absorb a greater amount of force before breaking apart [26]. In this case, it was evident as the maximum TS was almost the lowest for PHPC53 sample (21.92 MPa).…”

Section: Impact Strengthmentioning

confidence: 89%

Use of eco-benign periwinkle shell particle for making composites and study their effect on the thermal and mechanical properties of novel HDPE composites

Valsadwala

Srinivasan

Balachandran

et al. 2021

Preprint

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In this investigation, the shell powder of Littorina littorea commonly called periwinkle was used as an eco-benign filler in High-Density Polyethylene (HDPE) to form periwinkle/HDPE composites (PHPC). Understanding the effect of different particle sizes of periwinkle shell powder (PSP) and optimizing their influence on PHPC is the main scope of work. Periwinkle shell (PS) particle sizes from <53 μm to 150 μm were chosen as reinforcement. The different PSP size like <53 μm, 53 μm, 75 μm, 90 μm, 105 μm and 150 μm chosen in this study were named as PHPCL53, PHPC53, PHPC75, PHPC90, PHPC105, and PHPC150 respectively. The composites were fabricated by incorporating 1 weight % of PSP into HDPE matrix using compression molding technique and then subjected to morphological, thermal, and mechanical characterizations. Morphology studies using scanning electron microscope (SEM) confirms 150 μm PSP had best dispersion whereas 75 μm PSP resulted with agglomeration. PSP had little influence on the thermal stability of HDPE except for PHPC150 which showed rise in degradation temperature when compared to the neat sample. Mechanical properties such as hardness, Young’s modulus, impact strength, and flexural modulus were enhanced by the addition of PSP. Whereas, a decrease was noted in elongation at break (%) and flexural strength of PHPC indicating the stiffening effect of filler on HDPE. In order to understand the particle size influence better, the extension evaluation method (EEM) was performed for all samples and PHPC150 was found to be the best performing among all particle sizes.

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Regulation on dual-interface of core–shell dispersed phases and mechanical properties of PP blends by rotary evaporation-assisted melt grafted EPDM-g-MAH

Cited by 5 publications

References 50 publications

Silicone rubber/benzoxazine resin‐based nanocomposites: A study on compatibility and thermal stability

Silicone rubber/benzoxazine resin‐based nanocomposites: A study on compatibility and thermal stability

Effects of core‐shell structured rubber on biobased polyamide 56 with stiffness and toughness balance

Use of eco-benign periwinkle shell particle for making composites and study their effect on the thermal and mechanical properties of novel HDPE composites

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