Effect of MA-g-PP compatibilizer on morphology and electrical properties of MWCNT based blend nanocomposites: New strategy to enhance the dispersion of MWCNTs in immiscible poly (trimethylene terephthalate)/polypropylene blends

Ramachandran, Ajitha A.; Mathew, Lizzy; Thomas, Sabu

doi:10.1016/j.eurpolymj.2019.06.027

Cited by 32 publications

(19 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Poothanari et al 2 studied the EMI shielding effectiveness of polycarbonate/polypropylene (PC/PP)/MWCNT blend nanocomposites and they obtained an EMI shielding value of 54.78 dB for 2 mm thick shield sample at 10 wt% of MWCNT for compatibilized PC/PP/MWCNT nanocomposite. PTT/PP/MWCNT system was studied previously by our group and obtained excellent results 3,4 . Sharika et al fabricated PP/NR/MWCNT blend nanocomposites and measured shielding effectiveness of ~29 dB at 3 GHz for 7 wt% of MWCNT loading 5 .…”

Section: Introductionmentioning

confidence: 99%

Thin and efficient EMI shielding materials from binary thermoplastic blend nanocomposites

Kunjappan

Reghunadhan

Ramachandran

et al. 2022

Polymers for Advanced Techs

Self Cite

View full text Add to dashboard Cite

EMI shielding materials and related research are of very relevance in this era of electronic gadgets. Here this report presents a binary thermoplastic blend nanocomposite system comprising poly‐(trimethylene terephthalate) and polyethene compatibilized with multiwalled carbon nanotubes, which are showing superior electromagnetic interference (EMI) shielding compared to similar systems. The blend composition with a 90/10 ratio of PTT/PE was showing the optimum properties when a MWCNT concentration of 1 wt% was incorporated. The compatibilization efficacy was analyzed and confirmed through scanning and tunneling electron microscopes. The MWCNTs are preferably localized in the PTT phase. The blend system provides an electrical percolation threshold of 0.19 wt% due to the double percolating effect of the blend system and MWCNT in the PTT phase. It was observed that the EMI shielding value shows a corresponding increase with MWCNT loadings. The most favorable value obtained for EMI shielding effectiveness was ~32 dB and it was with 3 wt% MWCNT of film thickness 2 mm in range of frequency 2–4 GHz. The PTT/PE/MWCNT system was not considered for EMI applications anywhere else. The theoretical support of the experimental data was examined for DC conductivity employing different models such as Voet, Bueche, and Scarisbrick and the actual contribution of reflection, absorption, transmission loss to the total EMI shielding was done with Power balance. The present work is a facile and cost‐effective method to fabricate lightweight and materials with high EMI shielding properties for mobile phones.

show abstract

Section: Introductionmentioning

confidence: 99%

Thin and efficient EMI shielding materials from binary thermoplastic blend nanocomposites

Kunjappan

Reghunadhan

Ramachandran

et al. 2022

Polymers for Advanced Techs

Self Cite

View full text Add to dashboard Cite

show abstract

“…[32,35] In light of this, it becomes necessary to add compatibilizers, aiming at reducing the interfacial tension and improving the adhesion between the phases present in the mixture, in order to obtain a material with higher quality. [36] In general, rubbery compatibilizers have been explored in blends with PP, such as ethylene-propylene-diene (EPDM) and styrene-ethylene-butylene-styrene (SEBS). [37][38][39][40] These have the advantages of resistance to heat, oxygen, and ozone, since they do not have unsaturations in the main chain.…”

Section: Introductionmentioning

confidence: 99%

Reuse of carbon fiber waste to produce composites with polypropylene. The effect of styrene‐(ethylene‐butylene)‐styrene grafted with maleic anhydride and ethylene‐propylene‐diene grafted with maleic anhydride copolymers

et al. 2021

View full text Add to dashboard Cite

Carbon fiber (CF) is a difficult material to recycle, generating accumulation and environmental impacts when disposed of incorrectly. The practice of reuse is being encouraged, aiming to minimize socio-environmental impacts. The present research aimed to develop polypropylene (PP) composites with CF waste, using styrene-(ethylene-butylene)-styrene grafted with maleic anhydride (SEBS-MA) and ethylene-propylene-diene grafted with maleic anhydride (EPDM-MA), as compatibilizers. The composites were processed in a mixer and injection molded. The addition of the CF in the PP matrix did not hinder processability, as verified in torque rheometry. Significant increases were achieved in impact strength and elongation at break, especially in the PP/FC/ SEBS-MA and PP/FC/EPDM-MA composites. Incorporating 15% EPDM-MA reduced the elastic modulus and tensile strength by 23% and 32%, while SEBS-MA by 13% and 23%, relative to PP, respectively, due to the increase in flexibility of the composites. When the PP/FC composites were compatibilized with SEBS-MA and EPDM-MA, there was a higher level of interaction among the phases, generating a higher wettability, as verified in the scanning electron microscopy. Such behavior was important to increase the crystallinity of the compatibilized composites. The composites thermal stability increased significantly, increasing in 40 C, compared to pure PP. In general, the compatibilization with SEBS-MA was more effective, generating better properties.As a consequence, the heat deflection temperature of the composites remained the same as the level of pure PP, suggesting good structural stability. The results are valuable for the recycling area, since CF can be reused as a polymer additive to improve properties.

show abstract

“…These techniques include the use of compatibilizers such as graft copolymers, which act as a bridge between the matrix and the biofiller, thus enhancing their interaction. [ 18,19 ] Polyethylene grafted with maleic anhydride (PE ‐g‐ MA) is one of the most widely used compatibilizers in WPC with polyethylene matrices due to its dual functionality that can interact with both the polyethylene matrix (polyethylene segment chains in PE ‐g‐ MA), and the lignocellulosic filler (by the interaction of maleic anhydride with hydroxyl groups in lignocellulosic filler). Garcia‐Garcia, [ 20 ] studied the effect of different types of maleic anhydride‐based compatibilizers, namely polyethylene‐ graft ‐maleic anhydride (PE ‐g‐ MA), polypropylene‐ graft ‐maleic anhydride (PP ‐g‐ MA), and polystyrene‐block‐poly(ethylene ‐ran‐ butylene) ‐block‐ polystyrene‐ graft ‐maleic anhydride (SEBS ‐g‐ MA), on the compatibility of biobased polyethylene composites reinforced with peanut shell flour.…”

Section: Introductionmentioning

confidence: 99%

Manufacturing and Characterization of High‐Density Polyethylene Composites with Active Fillers from Persimmon Peel Flour with Improved Antioxidant Activity and Hydrophobicity

Rojas-Lema

Lascano

Martínez

et al. 2021

Macro Materials & Eng

View full text Add to dashboard Cite

The potential of persimmon peel waste (PPF) as renewable active filler in biobased polyethylene composites, with improved antioxidant properties and resistance to water uptake is shown. To improve the interaction between the hydrophilic biofiller and the highly hydrophobic matrix, several compatibilization approaches are assessed. The first approach consists of using a polyethylene grafted copolymer with maleic anhydride (PE‐g‐MA). The second approach consists of modifying the PPF surface with two treatments before compounding with Bio‐HDPE. The first consists on conventional silanization with (3‐glycidyloxypropyl)trimethoxysilane, while the second consists on esterification with palmitoyl chloride. The results show an improvement of the matrix/biofiller interaction, as observed by field emission scanning electron microscopy (FESEM), leading to an increase in Young's modulus of 10% in composites compatibilized with PE‐g‐MA, and silanized PPF compared to composites without compatibilizer and no surface treatment on PPF. Interestingly, treatment with palmitoyl chloride leads to an increase in the hydrophobic behavior of composites keeping the water contact angle virtually constant at 128°. This effect is also reflected in a clear decrease in water absorption capacity of only 0.3 wt% over 9 weeks. Finally, PPF increases stabilization against oxidation, improving the oxidation induction time from 4.8 min (Bio‐HDPE) to 82.5 min for composites with silanized PPF.

show abstract

Effect of MA-g-PP compatibilizer on morphology and electrical properties of MWCNT based blend nanocomposites: New strategy to enhance the dispersion of MWCNTs in immiscible poly (trimethylene terephthalate)/polypropylene blends

Cited by 32 publications

References 30 publications

Thin and efficient EMI shielding materials from binary thermoplastic blend nanocomposites

Thin and efficient EMI shielding materials from binary thermoplastic blend nanocomposites

Reuse of carbon fiber waste to produce composites with polypropylene. The effect of styrene‐(ethylene‐butylene)‐styrene grafted with maleic anhydride and ethylene‐propylene‐diene grafted with maleic anhydride copolymers

Manufacturing and Characterization of High‐Density Polyethylene Composites with Active Fillers from Persimmon Peel Flour with Improved Antioxidant Activity and Hydrophobicity

Contact Info

Product

Resources

About