Surface modification of polypropylene (PP) using single and dual high radio frequency capacitive coupled argon plasma discharge

Akbar, Demiral

doi:10.1016/j.apsusc.2015.11.191

Cited by 22 publications

(7 citation statements)

References 32 publications

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“…16 Although some studies from the literature indicate the aging of the plasma treatment on the polymeric membranes, there is a lack of information about the aging effect on the properties and performance of the membranes. 16,21,28,29 This work aims to present evidence that the changes promoted by treatment with DBD nonthermal plasma on the surfaces of polymeric PVDF and PES membranes tend to be reversible when this is the only treatment that the membranes are subjected to. The physical and chemical properties and performance of PVDF and PES membranes were assessed before and after plasma treatment to support our hypothesis.…”

Section: Introductionmentioning

confidence: 99%

Simple approach for the plasma treatment of polymeric membranes and investigation of the aging effect

Marques

Silveira

Leite

et al. 2021

J of Applied Polymer Sci

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The modification of the surface characteristics after treatment with plasma in polymeric materials, such as the aging phenomenon, calls the attention of research in the area of nonthermal plasma technology. In this work, a direct treatment with dielectric-barrier discharge plasma was used on the surfaces of ultrafiltration membranes. The measurements of the contact angle with water, attenuated total reflectance accessory, zeta potential, atomic force microscopy and scanning electron microscopy-MEV were performed on the surfaces to verify changes after plasma treatment and to understand the occurrence and timing of the plasma aging effect. In the analysis of the membrane performance, hydraulic permeation and protein retention tests were performed. The results showed an improvement in wettability and hydrophilic properties in the post-treated membranes. The study of reversibility/aging of the postplasma surface is important for research that deals with the modification of polymeric membranes. Changes in surface morphology, topography and wettability of the membranes were observed up to seven days after treatment, with a tendency to return to the initial characteristics of the membranes.

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Section: Introductionmentioning

confidence: 99%

Simple approach for the plasma treatment of polymeric membranes and investigation of the aging effect

Marques

Silveira

Leite

et al. 2021

J of Applied Polymer Sci

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“…The addition of WF has a lesser effect on the temperature of crystallization of R-PP based composites. In the literature, we can find information on the nucleation ability of lignocellulosic materials such as WF [25,27,30]. The researchers reported that untreated WF in thermoplastic composites act as good nucleating agents, while different chemical treatment of WF can lead to either increased or decreased nucleating ability.…”

Section: Resultsmentioning

confidence: 99%

“…With the incorporation of WF into the PP matrix, the biodegradability of WF-PP composites is enhanced [2]. There are many studies related to the development of wood (thermoplastics) polymer composites [2,14,16,17,[25][26][27][28][29]. Common to these studies the production of wood-thermoplastic polymer composites is based on chemically treated wood or polymer, which results in enhanced interactions between the wood and thermoplastic material, and, as a consequence, improved properties, such as (i) increased degree of crystallinity, (ii) increased mechanical properties and (iii) improved rheological properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of Wood Fiber Loading on the Chemical and Thermo-Rheological Properties of Unrecycled and Recycled Wood-Polymer Composites

et al. 2020

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Novel wood fiber (WF)-polypropylene composites were developed using the extrusion process with a twin-screw extruder. The influence of different mass addition of WF to unrecycled polypropylene (PP) and recycled PP (R-PP) on the chemical, thermal and rheological properties of the processed WF-PP and WF-R-PP composites was investigated. For this purpose, the chemical surface structure of the composites was followed with ATR-FTIR (attenuated total reflection Fourier transform infra red spectroscopy), while the thermal properties of the WF-PP composites were investigated with differential scanning calorimetry (DSC). Furthermore, the crystalline structure of the composites was determined by X-ray diffraction (XRD) analysis. Finally, the rheology of the materials was also studied. It was observed that a stronger particle formation at high additional concentrations was observed in the case of recycled PP material. The addition of WF over 20% by weight increased the crystallinity as a result of the incorporation and reorganization of the WF and also their reinforcing effect. The addition of WF to pure PP had an influence on the crystallization process, which due to the new β phase and γ phase PP formation showed an increased degree of crystallinity of the composites and led to a polymorphic structure of the composites WF-PP. From the rheological test, we can conclude that the addition of WF changed the rheological behavior of the material, as WF hindered the movement of the polymeric material. At lower concentrations, the change was less pronounced, although we observed more drastic changes in the material behavior at concentrations high enough that WF could form a 3D network (percolation point about 20%).

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“…33 And the calculation of crystal size L hkl ð Þ, which was perpendicular to the corresponding crystal plane (hkl), was described by the Scherrer equation as displayed in Equation (3). 34,35 Based on the Turner-Jones formula as shown in Equation ( 4), the relative content of the β phase (K β Þ was obtained. 33,34…”

Section: Wide Angle X-ray Diffractionmentioning

confidence: 99%

“…34,35 Based on the Turner-Jones formula as shown in Equation ( 4), the relative content of the β phase (K β Þ was obtained. 33,34…”

Section: Wide Angle X-ray Diffractionmentioning

confidence: 99%

Effects of nucleating agent content on the microstructure and macroscopic performances of polypropylene analyzed by non‐isothermal crystallization behaviors and isothermal crystallization morphologies

Yang

et al. 2023

J of Applied Polymer Sci

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Direct attainment of the crystal state corresponding to desired performances in processing can improve the productivity of semi‐crystalline polymer products. This work tried to propose the idea to approach the target by exploring the effects of nucleating agent content on non‐isothermal crystallization kinetics, isothermally crystallization morphologies and macroscopic properties of polypropylene (PP). The nucleating agent content varied from 0 to 0.5 phr, and all samples were prepared by melting blending at 180°C as the antioxidant and lubricant ensured fine stability and processing. The differential scanning calorimetry results and non‐isothermal crystallization kinetics indicated that introducing 0.3 phr nucleating agent advanced both initial crystallization and melting about 10°C and improved crystallization rate and crystallinity. Besides, 145°C was determined as an isothermal crystallization condition by setting temperature gradient, and the crystallization kinetics were described by a power‐law equation well. The average crystal size was refined to 40 μm uniformly and crystallization time was reduced to 1.5 min as loading 0.5 phr nucleating agent, contributing to the significant improvements in tensile and physical properties. Thus, adding such a short‐time heat insulation procedure into the non‐isothermal cooling stage during processing can obtain desired crystal state directly with loading adequate nucleating agent.

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Surface modification of polypropylene (PP) using single and dual high radio frequency capacitive coupled argon plasma discharge

Cited by 22 publications

References 32 publications

Simple approach for the plasma treatment of polymeric membranes and investigation of the aging effect

Simple approach for the plasma treatment of polymeric membranes and investigation of the aging effect

Effect of Wood Fiber Loading on the Chemical and Thermo-Rheological Properties of Unrecycled and Recycled Wood-Polymer Composites

Effects of nucleating agent content on the microstructure and macroscopic performances of polypropylene analyzed by non‐isothermal crystallization behaviors and isothermal crystallization morphologies

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