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Cui Z, Zhang Y, Zhu C, Song L, Wang J, Jin Q, Su Q, Qi D. Effect of melting temperatures on the orientation and rheology of polyacrylate/silica (
PAcr
/
SiO
2
) composite microspheres in twin‐screw extruder. J Appl Polym Sci 2022. [DOI: 10.1002/app.52648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zhonglan Cui
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology and Engineering Research Center for Eco‐Dyeing & Finishing of Textiles Zhejiang Sci‐Tech University Hangzhou PR China
| | - Yan Zhang
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology and Engineering Research Center for Eco‐Dyeing & Finishing of Textiles Zhejiang Sci‐Tech University Hangzhou PR China
- Key Laboratory of Green Cleaning Technology & Detergent of Zhejiang Province Lishui PR China
| | - Chenkai Zhu
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology and Engineering Research Center for Eco‐Dyeing & Finishing of Textiles Zhejiang Sci‐Tech University Hangzhou PR China
| | - Lixiang Song
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology and Engineering Research Center for Eco‐Dyeing & Finishing of Textiles Zhejiang Sci‐Tech University Hangzhou PR China
| | - Jicheng Wang
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology and Engineering Research Center for Eco‐Dyeing & Finishing of Textiles Zhejiang Sci‐Tech University Hangzhou PR China
| | - Qianhong Jin
- Yiwu Zhongli Industry and Trade Co., Ltd. Yiwu PR China
| | - Qunchao Su
- Yiwu Zhongli Industry and Trade Co., Ltd. Yiwu PR China
| | - Dongming Qi
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology and Engineering Research Center for Eco‐Dyeing & Finishing of Textiles Zhejiang Sci‐Tech University Hangzhou PR China
- Key Laboratory of Green Cleaning Technology & Detergent of Zhejiang Province Lishui PR China
- Zhejiang Provincial Engineering Research Center for Green and Low‐carbon Dyeing & Finishing Zhejiang Sci‐Tech University Hangzhou PR China
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Song HY, Park SY, Kim S, Youn HJ, Hyun K. Linear and nonlinear oscillatory rheology of chemically pretreated and non-pretreated cellulose nanofiber suspensions. Carbohydr Polym 2022; 275:118765. [PMID: 34742451 DOI: 10.1016/j.carbpol.2021.118765] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 09/24/2021] [Accepted: 10/06/2021] [Indexed: 11/02/2022]
Abstract
Linear and nonlinear rheological properties of cellulose nanofiber (CNF) suspensions were measured under small and large amplitude oscillatory shear (SAOS and LAOS) flow. Four different CNFs were produced, two by only mechanical disintegration and two with chemical pretreatments. Linear viscoelastic properties distinguished chemically treated CNFs from two untreated fibers via a different scaling exponent of the elastic modulus. However, different mechanical fibrillation degree was not characterized via linear viscoelastic properties. In contrast, nonlinear viscoelastic properties reflected both effects of chemical pretreatments and mechanical fibrillation. More fibrillated CNFs exhibited nonlinear rheological phenomena at larger deformations. In addition, chemically treated CNFs exhibited greater network stiffness and higher network recovery rates due to the presence of charged functional groups on the fiber surfaces. A material-property co-plot showed that network stiffness and recovery rate were in a trade-off relationship.
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Affiliation(s)
- Hyeong Yong Song
- Institute for Environment and Energy, Pusan National University, Busan 46241, Republic of Korea
| | - Shin Young Park
- Department of Forest Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Sunhyung Kim
- Platform Technology, Corporate R&D, LG Chem. Ltd., Gwacheon-si, Gyeonggi-do 13818, Republic of Korea
| | - Hye Jung Youn
- Department of Agriculture, Forestry and Bioresources, Seoul National University, Seoul 08826, Republic of Korea; Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Kyu Hyun
- Institute for Environment and Energy, Pusan National University, Busan 46241, Republic of Korea; School of Applied Chemical Engineering, Pusan National University, Busan 46241, Republic of Korea.
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Erfanian E, Kamkar M, Pawar SP, Keteklahijani YZ, Arjmand M, Sundararaj U. A Simple Approach to Control the Physical and Chemical Features of Custom-Synthesized N-Doped Carbon Nanotubes and the Extent of Their Network Formation in Polymers: The Importance of Catalyst to Substrate Ratio. Polymers (Basel) 2021; 13:polym13234156. [PMID: 34883659 PMCID: PMC8659621 DOI: 10.3390/polym13234156] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 11/22/2021] [Accepted: 11/23/2021] [Indexed: 12/02/2022] Open
Abstract
This study intends to reveal the significance of the catalyst to substrate ratio (C/S) on the structural and electrical features of the carbon nanotubes and their polymeric nanocomposites. Here, nitrogen-doped carbon nanotube (N-MWNT) was synthesized via a chemical vapor deposition (CVD) method using three ratios (by weight) of iron (Fe) catalyst to aluminum oxide (Al2O3) substrate, i.e.,1/9, 1/4, and 2/3, by changing the Fe concentration, i.e., 10, 20, and 40 wt.% Fe. Therefore, the synthesized N-MWNT are labelled as (N-MWNTs)10, (N-MWNTs)20, and (N-MWNTs)40. TEM, XPS, Raman spectroscopy, and TGA characterizations revealed that C/S ratio has a significant impact on the physical and chemical properties of the nanotubes. For instance, by increasing the Fe catalyst from 10 to 40 wt.%, carbon purity increased from 60 to 90 wt.% and the length of the nanotubes increased from 1.2 to 2.6 µm. Interestingly, regarding nanotube morphology, at the highest C/S ratio, the N-MWNTs displayed an open-channel structure, while at the lowest catalyst concentration the nanotubes featured a bamboo-like structure. Afterwards, the network characteristics of the N-MWNTs in a polyvinylidene fluoride (PVDF) matrix were studied using imaging techniques, AC electrical conductivity, and linear and nonlinear rheological measurements. The nanocomposites were prepared via a melt-mixing method at various loadings of the synthesized N-MWNTs. The rheological results confirmed that (N-MWNTs)10, at 0.5–2.0 wt.%, did not form any substantial network through the PVDF matrix, thereby exhibiting an electrically insulative behavior, even at a higher concentration of 3.0 wt.%. Although the optical microscopy, TEM, and rheological results confirmed that both (N-MWNTs)20 and (N-MWNTs)40 established a continuous 3D network within the PVDF matrix, (N-MWNTs)40/PVDF nanocomposites exhibited approximately one order of magnitude higher electrical conductivity. The higher electrical conductivity of (N-MWNTs)40/PVDF nanocomposites is attributed to the intrinsic chemical features of (N-MWNTs)40, such as nitrogen content and nitrogen bonding types.
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Affiliation(s)
- Elnaz Erfanian
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada; (E.E.); (S.P.P.); (Y.Z.K.)
| | - Milad Kamkar
- School of Engineering, University of British Columbia, Kelowna, BC V1V 1V7, Canada; (M.K.); (M.A.)
| | - Shital Patangrao Pawar
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada; (E.E.); (S.P.P.); (Y.Z.K.)
| | - Yalda Zamani Keteklahijani
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada; (E.E.); (S.P.P.); (Y.Z.K.)
| | - Mohammad Arjmand
- School of Engineering, University of British Columbia, Kelowna, BC V1V 1V7, Canada; (M.K.); (M.A.)
| | - Uttandaraman Sundararaj
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada; (E.E.); (S.P.P.); (Y.Z.K.)
- Correspondence: ; Tel.: +1-403-210-6549; Fax: +1-403-2844852
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Chen R, Yang H, Yang X, Han L, Zhang Z, Li Y. Impact of hybrid nanofillers on the structure and property of polypropylene/polystyrene composites based on elongation flow. POLYM ADVAN TECHNOL 2021. [DOI: 10.1002/pat.5436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Rong‐Yuan Chen
- Henan Provincial Key Laboratory of Surface and Interface Science, College of Material and Chemical Engineering Zhengzhou University of Light Industry Zhengzhou China
| | - Hao‐Ran Yang
- Henan Provincial Key Laboratory of Surface and Interface Science, College of Material and Chemical Engineering Zhengzhou University of Light Industry Zhengzhou China
| | - Xiao‐Zhuang Yang
- Henan Provincial Key Laboratory of Surface and Interface Science, College of Material and Chemical Engineering Zhengzhou University of Light Industry Zhengzhou China
| | - Lin Han
- Henan Provincial Key Laboratory of Surface and Interface Science, College of Material and Chemical Engineering Zhengzhou University of Light Industry Zhengzhou China
| | - Zhong‐Hou Zhang
- Henan Provincial Key Laboratory of Surface and Interface Science, College of Material and Chemical Engineering Zhengzhou University of Light Industry Zhengzhou China
| | - Ya‐Dong Li
- Henan Provincial Key Laboratory of Surface and Interface Science, College of Material and Chemical Engineering Zhengzhou University of Light Industry Zhengzhou China
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Nofar M, Mohammadi M, Carreau PJ. Nanoclay Migration and the Rheological Response of PBAT/LDPE Blends. INT POLYM PROC 2021. [DOI: 10.1515/ipp-2020-4057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Blends of a poly(butylene adipate-co-terephthalate) (PBAT) and a low density polyethylene (LDPE) (80 wt%/20 wt%) were prepared through a twin screw extruder while incorporating 3 wt% Cloisite 30B (C30B) nanoclay that possessed a much higher affinity with PBAT. The blends were processed through three melt mixing strategies: ( i) direct mixing of all three components, (ii) mixing C30B and PBAT followed by mixing with LDPE, and (iii) mixing C30B and LDPE followed by mixing with PBAT. The rheological properties of each system were determined in small amplitude oscillatory shear (SAOS) experiments. The migration of C30B nanoparticles from the LDPE minor phase towards the PBAT matrix was then monitored in the blend nanocomposites prepared through strategy (iii) via SAOS time sweep experiments. It was firstly understood that the C30B migration could be detected during time sweep SAOS experiments. The migration time was observed to be frequency dependent due to the smaller length scales probed at larger frequencies. Such migration occurred even faster when the SAOS time sweep experiments were conducted at a higher temperature due to the viscosity reduction.
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Affiliation(s)
- M. Nofar
- Department of Metallurgical and Materials Engineering Department, Faculty of Chemical and Metallurgical Engineering, Istanbul Technical University , Istanbul , Turkey
| | - M. Mohammadi
- Center for High Performance Polymer and Composite Systems (CREPEC), Chemical Engineering Department, Polytechnique Montreal, Montreal , Quebec , Canada
| | - P. J. Carreau
- Center for High Performance Polymer and Composite Systems (CREPEC), Chemical Engineering Department, Polytechnique Montreal, Montreal , Quebec , Canada
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SEBS-b-TPU and nanoclay: effective compatibilizers for promotion of the interfacial adhesion and properties of immiscible SEBS/TPU blends. Polym Bull (Berl) 2021. [DOI: 10.1007/s00289-020-03272-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Otero Navas I, Kamkar M, Arjmand M, Sundararaj U. Morphology Evolution, Molecular Simulation, Electrical Properties, and Rheology of Carbon Nanotube/Polypropylene/Polystyrene Blend Nanocomposites: Effect of Molecular Interaction between Styrene-Butadiene Block Copolymer and Carbon Nanotube. Polymers (Basel) 2021; 13:polym13020230. [PMID: 33440844 PMCID: PMC7827940 DOI: 10.3390/polym13020230] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 12/29/2020] [Accepted: 01/05/2021] [Indexed: 11/23/2022] Open
Abstract
This work studied the impact of three types of styrene-butadiene (SB and SBS) block copolymers on the morphology, electrical, and rheological properties of immiscible blends of polypropylene:polystyrene (PP:PS)/multi-walled carbon nanotubes (MWCNT) with a fixed blend ratio of 70:30 vol.%. The addition of block copolymers to PP:PS/MWCNT blend nanocomposites produced a decrease in the droplet size. MWCNTs, known to induce co-continuity in PP:PS blends, did not interfere with the copolymer migration to the interface and, thus, there was morphology refinement upon addition of the copolymers. Interestingly, the addition of the block copolymers decreased the electrical resistivity of the PP:PS/1.0 vol.% MWCNT system by 5 orders of magnitude (i.e., increase in electrical conductivity). This improvement was attributed to PS Droplets-PP-Copolymer-Micelle assemblies, which accumulated MWCNTs, and formed an integrated network for electrical conduction. Molecular simulation and solubility parameters were used to predict the MWCNT localization in the immiscible blend. The simulation results showed that diblock copolymers favorably interact with the nanotubes in comparison to the triblock copolymer, PP, and PS. However, the interaction between the copolymers and PP or PS is stronger than the interaction of the copolymers and MWCNTs. Hence, the addition of copolymer also changed the localization of MWCNT from PS to PS–PP–Micelles–Interface, as observed by TEM images. In addition, in the last step of this work, we investigated the effect of the addition of copolymers on inter- and intra-cycle viscoelastic behavior of the MWCNT incorporated polymer blends. It was found that addition of the copolymers not only affects the linear viscoelasticity (e.g., increase in the value of the storage modulus) but also dramatically impacts the nonlinear viscoelastic behavior under large deformations (e.g., higher distortion of Lissajous–Bowditch plots).]
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Affiliation(s)
- Ivonne Otero Navas
- Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada; (I.O.N.); (M.K.)
| | - Milad Kamkar
- Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada; (I.O.N.); (M.K.)
- School of Engineering, University of British Columbia, Kelowna, BC V1V 1V7, Canada;
| | - Mohammad Arjmand
- School of Engineering, University of British Columbia, Kelowna, BC V1V 1V7, Canada;
| | - Uttandaraman Sundararaj
- Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada; (I.O.N.); (M.K.)
- Correspondence:
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Salehiyan R, Nofar M, Malkappa K, Ray SS. Effect of nanofillers characteristics and their selective localization on morphology development and rheological properties of melt‐processed polylactide/poly(butylene adipate‐co‐terephthalate) blend composites. POLYM ENG SCI 2020. [DOI: 10.1002/pen.25505] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Reza Salehiyan
- Centre for Nanostructures and Advanced Materials DSI‐CSIR Nanotechnology Innovation Centre, Council for Scientific and Industrial Research Pretoria South Africa
| | - Mohammadreza Nofar
- Metallurgical and Materials Engineering Department Faculty of Chemical and Metallurgical Engineering, Istanbul Technical University Maslak Turkey
| | - Kuruma Malkappa
- Centre for Nanostructures and Advanced Materials DSI‐CSIR Nanotechnology Innovation Centre, Council for Scientific and Industrial Research Pretoria South Africa
| | - Suprakas Sinha Ray
- Centre for Nanostructures and Advanced Materials DSI‐CSIR Nanotechnology Innovation Centre, Council for Scientific and Industrial Research Pretoria South Africa
- Department of Chemical Sciences University of Johannesburg Johannesburg South Africa
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Büttler J, Bechtold T, Pham T. Investigation of Interfacial Diffusion in PA/PP- g-MAH Laminates Using Nanoscale Infrared Spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:9886-9893. [PMID: 32787119 PMCID: PMC7450657 DOI: 10.1021/acs.langmuir.0c01447] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 07/17/2020] [Indexed: 06/11/2023]
Abstract
The characterization of polymer-polymer interfaces is of great interest to understand the diffusion process and chemical interactions in polymeric multiphase systems. This study investigated the formation of the interface layer between polyamide (PA) and polypropylene (PP) and its dependency on the maleic anhydride (MAH) content in PP. New insights with a very high level of details on the formation of the interfacial layer are obtained by employing a special technique of atomic force microscopy (AFM) combined with infrared (IR) for chemical imaging at nanoscale spatial resolution. This enables the determination of the interface thickness and even the observation and visualization of the diffusion gradient across the PA/PP interface layer. Combined with classical investigation methods such as interfacial energy and rheology, the method of nano-IR spectroscopy represents a very powerful tool to obtain more insights and a deeper understanding of the interfacial phenomenon in multiphase polymeric systems.
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Chen R, Liu X, Han L, Zhang Z, Li Y. Morphology, thermal behavior, rheological, and mechanical properties of polypropylene/polystyrene blends based on elongation flow. POLYM ADVAN TECHNOL 2020. [DOI: 10.1002/pat.4998] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Rongyuan Chen
- Henan Provincial Key Laboratory of Surface and Interface Science, College of Material and Chemical Engineering Zhengzhou University of Light Industry Zhengzhou China
| | - Xin Liu
- Henan Provincial Key Laboratory of Surface and Interface Science, College of Material and Chemical Engineering Zhengzhou University of Light Industry Zhengzhou China
| | - Lin Han
- Henan Provincial Key Laboratory of Surface and Interface Science, College of Material and Chemical Engineering Zhengzhou University of Light Industry Zhengzhou China
| | - Zhonghou Zhang
- Henan Provincial Key Laboratory of Surface and Interface Science, College of Material and Chemical Engineering Zhengzhou University of Light Industry Zhengzhou China
| | - Yadong Li
- Henan Provincial Key Laboratory of Surface and Interface Science, College of Material and Chemical Engineering Zhengzhou University of Light Industry Zhengzhou China
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Lu F, Liu Y, Wang F, Mai Y, Li D. Effect of Organo‐Modified Montmorillonite on the Morphology and Properties of SEBS/TPU Nanocomposites. POLYM ENG SCI 2020. [DOI: 10.1002/pen.25344] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Fang Lu
- Guangdong Research Institute of Petrochemical and Fine Chemical Engineering, Guangdong Provincial Key Laboratory of Industrial Surfactant Guangzhou 510665 China
| | - Yang Liu
- Guangdong Research Institute of Petrochemical and Fine Chemical Engineering, Guangdong Provincial Key Laboratory of Industrial Surfactant Guangzhou 510665 China
| | - Fang Wang
- Guangdong Research Institute of Petrochemical and Fine Chemical Engineering, Guangdong Provincial Key Laboratory of Industrial Surfactant Guangzhou 510665 China
| | - Yu‐liang Mai
- Guangdong Research Institute of Petrochemical and Fine Chemical Engineering, Guangdong Provincial Key Laboratory of Industrial Surfactant Guangzhou 510665 China
| | - Dai‐yuan Li
- Guangdong Research Institute of Petrochemical and Fine Chemical Engineering, Guangdong Provincial Key Laboratory of Industrial Surfactant Guangzhou 510665 China
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Kim M, Song HY, Choi WJ, Hyun K. Evaluation of the Degree of Dispersion of Polymer Nanocomposites (PNCs) Using Nonlinear Rheological Properties by FT-Rheology. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01302] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Mingeun Kim
- School of Chemical Biomolecular Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Hyeong Yong Song
- School of Chemical Biomolecular Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Woo Jin Choi
- Chemical Materials Solutions Center, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Kyu Hyun
- School of Chemical Biomolecular Engineering, Pusan National University, Busan 46241, Republic of Korea
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Conductive nylon-MXD6 composites prepared by melt compounding associated with formation of carbon black-covered PET domains serving as big conductive particles. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.121809] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Lee S, Kim M, Song HY, Hyun K. Characterization of the Effect of Clay on Morphological Evaluations of PLA/Biodegradable Polymer Blends by FT-Rheology. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00800] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Sumkun Lee
- School of Chemical and Biomolecular Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Mingeun Kim
- School of Chemical and Biomolecular Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Hyeong Yong Song
- School of Chemical and Biomolecular Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Kyu Hyun
- School of Chemical and Biomolecular Engineering, Pusan National University, Busan 46241, Republic of Korea
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Malwela T, Khumalo VM, Salehiyan R, Ray SS. Characterization of polypropylene/polystyrene boehmite alumina nanocomposites: Impact of filler surface modification on the mechanical, thermal, and rheological properties. J Appl Polym Sci 2018. [DOI: 10.1002/app.46376] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Thomas Malwela
- DST-CSIR National Centre for Nanostructured Materials, Council for Scientific and Industrial Research; Pretoria 0001 South Africa
| | - Vincent Mandla Khumalo
- Department of Chemical, Metallurgical and Materials Engineering, Polymer Technology Division; Tshwane University of Technology; Pretoria 0001 South Africa
| | - Reza Salehiyan
- DST-CSIR National Centre for Nanostructured Materials, Council for Scientific and Industrial Research; Pretoria 0001 South Africa
| | - Suprakas Sinha Ray
- DST-CSIR National Centre for Nanostructured Materials, Council for Scientific and Industrial Research; Pretoria 0001 South Africa
- Department of Applied Chemistry; University of Johannesburg; Doornfontein 2028, Johannesburg South Africa
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Fernandez-Rodriguez MA, Binks BP, Rodriguez-Valverde MA, Cabrerizo-Vilchez MA, Hidalgo-Alvarez R. Particles adsorbed at various non-aqueous liquid-liquid interfaces. Adv Colloid Interface Sci 2017; 247:208-222. [PMID: 28219622 DOI: 10.1016/j.cis.2017.02.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Accepted: 02/05/2017] [Indexed: 02/02/2023]
Abstract
Particles adsorbed at liquid interfaces are commonly used to stabilise water-oil Pickering emulsions and water-air foams. The fundamental understanding of the physics of particles adsorbed at water-air and water-oil interfaces is improving significantly due to novel techniques that enable the measurement of the contact angle of individual particles at a given interface. The case of non-aqueous interfaces and emulsions is less studied in the literature. Non-aqueous liquid-liquid interfaces in which water is replaced by other polar solvents have properties similar to those of water-oil interfaces. Nanocomposites of non-aqueous immiscible polymer blends containing inorganic particles at the interface are of great interest industrially and consequently more work has been devoted to them. By contrast, the behaviour of particles adsorbed at oil-oil interfaces in which both oils are immiscible and of low dielectric constant (ε<3) is scarcely studied. Hydrophobic particles are required to stabilise these oil-oil emulsions due to their irreversible adsorption, high interfacial activity and elastic shell behaviour.
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Affiliation(s)
- Miguel Angel Fernandez-Rodriguez
- Biocolloid and Fluid Physics Group, Applied Physics Department, Faculty of Sciences, University of Granada, 18071-E Granada, Spain.
| | - Bernard P Binks
- School of Mathematics and Physical Sciences, University of Hull, Hull HU6 7RX, UK
| | - Miguel Angel Rodriguez-Valverde
- Biocolloid and Fluid Physics Group, Applied Physics Department, Faculty of Sciences, University of Granada, 18071-E Granada, Spain
| | - Miguel Angel Cabrerizo-Vilchez
- Biocolloid and Fluid Physics Group, Applied Physics Department, Faculty of Sciences, University of Granada, 18071-E Granada, Spain
| | - Roque Hidalgo-Alvarez
- Biocolloid and Fluid Physics Group, Applied Physics Department, Faculty of Sciences, University of Granada, 18071-E Granada, Spain
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Song HY, Park SJ, Hyun K. Characterization of Dilution Effect of Semidilute Polymer Solution on Intrinsic Nonlinearity Q0 via FT Rheology. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00119] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hyeong Yong Song
- School
of Chemical and Biomolecular Engineering, Pusan National University, Busan 46241, South Korea
| | - Seung Joon Park
- Department
of Chemical Engineering and Biotechnology, Korea Polytechnic University, Siheung-Si, Gyeonggi-Do 15073, South Korea
| | - Kyu Hyun
- School
of Chemical and Biomolecular Engineering, Pusan National University, Busan 46241, South Korea
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Salehiyan R, Ray SS, Bandyopadhyay J, Ojijo V. The Distribution of Nanoclay Particles at the Interface and Their Influence on the Microstructure Development and Rheological Properties of Reactively Processed Biodegradable Polylactide/Poly(butylene succinate) Blend Nanocomposites. Polymers (Basel) 2017; 9:E350. [PMID: 30971028 PMCID: PMC6418579 DOI: 10.3390/polym9080350] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 08/04/2017] [Accepted: 08/07/2017] [Indexed: 11/24/2022] Open
Abstract
The present work investigates the distribution of nanoclay particles at the interface and their influence on the microstructure development and non-linear rheological properties of reactively processed biodegradable polylactide/poly(butylene succinate) blend nanocomposites. Two types of organoclays, one is more hydrophilic (Cloisite®30B (C30B)) and another one is more hydrophobic (BetsopaTM (BET)), were used at different concentrations. Surface and transmission electron microscopies were respectively used to study the blend morphology evolution and for probing the dispersion and distribution of nanoclay platelets within the blend matrix and at the interface. The results suggested that both organoclays tended to localize at the interface between the blend's two phases and encapsulate the dispersed poly(butylene succinate) phase, thereby suppressing coalescence. Using small angle X-ray scattering the probability of finding neighboring nanoclay particles in the blend matrix was calculated using the Generalized Indirect Fourier Transformation technique. Fourier Transform-rheology was utilized for quantifying nonlinear rheological responses and for correlating the extent of dispersion as well as the blend morphological evolution, for different organoclay loadings. The rheological responses were in good agreement with the X-ray scattering and electron microscopic results. It was revealed that C30B nanoparticles were more efficient in stabilizing the morphologies by evenly distributing at the interface. Nonlinear coefficient from FT-rheology was found to be more pronounced in case of blends filled with C30B, indicating better dispersion of C30B compare with BET which was in agreement with the SAXS results.
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Affiliation(s)
- Reza Salehiyan
- DST-CSIR National Centre for Nanostructured Materials, Council for Scientific and Industrial Research, Pretoria 0001, South Africa.
| | - Suprakas Sinha Ray
- DST-CSIR National Centre for Nanostructured Materials, Council for Scientific and Industrial Research, Pretoria 0001, South Africa.
- Department of Applied Chemistry, University of Johannesburg, Doornfontein 2028, South Africa.
| | - Jayita Bandyopadhyay
- DST-CSIR National Centre for Nanostructured Materials, Council for Scientific and Industrial Research, Pretoria 0001, South Africa.
| | - Vincent Ojijo
- DST-CSIR National Centre for Nanostructured Materials, Council for Scientific and Industrial Research, Pretoria 0001, South Africa.
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Belkhir K, Jegat C, Prochazka F, Taha M. Quaternary ammonium-functionalized polymers in biodegradable matrices: Physicochemical properties, morphology, and biodegradability. J Appl Polym Sci 2017. [DOI: 10.1002/app.45261] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Kedafi Belkhir
- Université de Lyon; Saint Etienne F-42023 France
- CNRS, UMR5223, Ingénierie des Matériaux Polymères; Saint-Etienne F-42023 France
- Université Jean Monnet de Saint Etienne; Saint-Etienne F-42023 France
| | - Corinne Jegat
- Université de Lyon; Saint Etienne F-42023 France
- CNRS, UMR5223, Ingénierie des Matériaux Polymères; Saint-Etienne F-42023 France
- Université Jean Monnet de Saint Etienne; Saint-Etienne F-42023 France
| | - Frédéric Prochazka
- Université de Lyon; Saint Etienne F-42023 France
- CNRS, UMR5223, Ingénierie des Matériaux Polymères; Saint-Etienne F-42023 France
- Université Jean Monnet de Saint Etienne; Saint-Etienne F-42023 France
| | - Mohamed Taha
- Université de Lyon; Saint Etienne F-42023 France
- CNRS, UMR5223, Ingénierie des Matériaux Polymères; Saint-Etienne F-42023 France
- Université Jean Monnet de Saint Etienne; Saint-Etienne F-42023 France
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Zhang Q, Wang J, Yu J, Guo ZX. Improved electrical conductivity of TPU/carbon black composites by addition of COPA and selective localization of carbon black at the interface of sea-island structured polymer blends. SOFT MATTER 2017; 13:3431-3439. [PMID: 28440366 DOI: 10.1039/c7sm00346c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The electrical percolation threshold of carbon black (CB) in thermoplastic polyurethane (TPU) decreases by 46% with the incorporation of 20 wt% polyamide copolymer (COPA) through selective localization of CB particles at the interface of sea-island structured TPU/COPA blends. Composites with a composition of TPU/20 wt% COPA/9 wt% CB were prepared by four different mixing sequences and their morphologies were investigated by FESEM and TEM. The majority of CB particles were observed at the interface of sea-island structured blends irrespective of the compounding sequence used, although the percentage of CB particles at the interface is considerably less in the composite prepared by adding COPA to premixed TPU/CB. The driving force for the interfacial localization of most CB particles is the hydrogen bonding of CB with both TPU and COPA, which is confirmed by FTIR and DMA investigations. CB particles act like Janus particle-type compatibilizers with bonded TPU molecules toward the TPU phase and bonded COPA chains toward the COPA phase. Highly efficient conductive paths are formed through the CB-covered domains and a short inter-domain distance.
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Affiliation(s)
- Qiyan Zhang
- Key Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China.
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Sangroniz L, Palacios JK, Fernández M, Eguiazabal JI, Santamaria A, Müller AJ. Linear and non-linear rheological behavior of polypropylene/polyamide blends modified with a compatibilizer agent and nanosilica and its relationship with the morphology. Eur Polym J 2016. [DOI: 10.1016/j.eurpolymj.2016.07.026] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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