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Pasch H, Ndiripo A, Bungu PSE. Multidimensional analytical protocols for the fractionation and analysis of complex polyolefins. JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1002/pol.20210236] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Harald Pasch
- Department of Chemistry and Polymer Science University of Stellenbosch De Beers Street Stellenbosch 7602 South Africa
| | - Anthony Ndiripo
- Department of Chemistry and Polymer Science University of Stellenbosch De Beers Street Stellenbosch 7602 South Africa
- Polymer Separation Group Leibniz‐Institut für Polymerforschung Dresden e.V Hohe Strasse 6 Dresden 01069 Germany
- Department of Applied Chemistry National University of Science and Technology Box AC939, Ascot Bulawayo Zimbabwe
| | - Paul Severin Eselem Bungu
- Department of Chemistry and Polymer Science University of Stellenbosch De Beers Street Stellenbosch 7602 South Africa
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2
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Odarchenko Y, Rosenthal M, Hernandez JJ, Doblas D, Di Cola E, Soloviev M, Ivanov DA. Assessing Fast Structure Formation Processes in Isotactic Polypropylene with a Combination of Nanofocus X-ray Diffraction and In Situ Nanocalorimetry. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:2652. [PMID: 34685096 PMCID: PMC8541291 DOI: 10.3390/nano11102652] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 10/02/2021] [Accepted: 10/04/2021] [Indexed: 11/17/2022]
Abstract
A combination of in situ nanocalorimetry with simultaneous nanofocus 2D Wide-Angle X-ray Scattering (WAXS) was used to study polymorphic behaviour and structure formation in a single micro-drop of isotactic polypropylene (iPP) with defined thermal history. We were able to generate, detect, and characterize a number of different iPP morphologies using our custom-built ultrafast chip-based nanocalorimetry instrument designed for use with the European Synchrotron Radiation Facility (ESRF) high intensity nanofocus X-ray beamline facility. The detected iPP morphologies included monoclinic alpha-phase crystals, mesophase, and mixed morphologies with different mesophase/crystalline compositional ratios. Monoclinic crystals formed from the mesophase became unstable at heating rates above 40 K s-1 and showed melting temperatures as low as ~30 K below those measured for iPP crystals formed by slow cooling. We also studied the real-time melt crystallization of nanogram-sized iPP samples. Our analysis revealed a mesophase nucleation time of around 1 s and the co-existence of mesophase and growing disordered crystals at high supercooling ≤328 K. The further increase of the iPP crystallization temperature to 338 K changed nucleation from homogeneous to heterogeneous. No mesophase was detected above 348 K. Low supercooling (≥378 K) led to the continuous growth of the alpha-phase crystals. In conclusion, we have, for the first time, measured the mesophase nucleation time of supercooled iPP melted under isothermal crystallization conditions using a dedicated experimental setup designed to allow simultaneous ultrafast chip-based nanocalorimetry and nanofocus X-ray diffraction analyses. We also provided experimental evidence that upon heating, the mesophase converts directly into thermodynamically stable monoclinic alpha-phase crystals via perfection and reorganization and not via partial melting. The complex phase behaviour of iPP and its dependence on both crystallization temperature and time is presented here using a time-temperature-transformation (TTT) diagram.
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Affiliation(s)
- Yaroslav Odarchenko
- Institut de Sciences des Matériaux de Mulhouse-IS2M, CNRS UMR 7361, Jean Starcky, 15, F-68057 Mulhouse, France; (Y.O.); (J.J.H.); (D.D.)
- Department of Biological Sciences, Royal Holloway University of London, Egham, Surrey TW20 0EX, UK
| | - Martin Rosenthal
- European Synchrotron Radiation Facility (ESRF), 38043 Grenoble, France;
| | - Jaime J. Hernandez
- Institut de Sciences des Matériaux de Mulhouse-IS2M, CNRS UMR 7361, Jean Starcky, 15, F-68057 Mulhouse, France; (Y.O.); (J.J.H.); (D.D.)
| | - David Doblas
- Institut de Sciences des Matériaux de Mulhouse-IS2M, CNRS UMR 7361, Jean Starcky, 15, F-68057 Mulhouse, France; (Y.O.); (J.J.H.); (D.D.)
| | - Emanuela Di Cola
- European Synchrotron Radiation Facility (ESRF), 38043 Grenoble, France;
| | - Mikhail Soloviev
- Department of Biological Sciences, Royal Holloway University of London, Egham, Surrey TW20 0EX, UK
| | - Dimitri A. Ivanov
- Institut de Sciences des Matériaux de Mulhouse-IS2M, CNRS UMR 7361, Jean Starcky, 15, F-68057 Mulhouse, France; (Y.O.); (J.J.H.); (D.D.)
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), 1 Leninskie Gory, 119991 Moscow, Russia
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432 Chernogolovka, Russia
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3
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Pastor-García MT, Suárez I, Expósito MT, Coto B, García-Muñoz RA. Engineered PP impact copolymers in a single reactor as efficient method for determining their structure and properties. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110642] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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4
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Unraveling Multiple Distributions in Chain Walking Polyethylene Using Advanced Liquid Chromatography. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00314] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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5
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Ndiripo A, Pasch H. Retention of polypropylene stereoisomers in solvent gradient interaction chromatography on porous graphitic carbon as influenced by temperature and mobile phase composition. J Chromatogr A 2020; 1618:460865. [DOI: 10.1016/j.chroma.2020.460865] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 12/23/2019] [Accepted: 01/08/2020] [Indexed: 10/25/2022]
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6
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Magagula SI, Ndiripo A, Johannes van Reenen A. Heterophasic ethylene-propylene copolymers: New insights on complex microstructure by combined molar mass fractionation and high temperature liquid chromatography. Polym Degrad Stab 2020. [DOI: 10.1016/j.polymdegradstab.2019.109022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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7
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Wang X, Hu S, Guo Y, Li G, Xu R. Toughened High-Flow Polypropylene with Polyolefin-based Elastomers. Polymers (Basel) 2019; 11:polym11121976. [PMID: 31805651 PMCID: PMC6960586 DOI: 10.3390/polym11121976] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 11/26/2019] [Accepted: 11/28/2019] [Indexed: 11/18/2022] Open
Abstract
Polyolefin is the most widely used and versatile commodity polymer. In this work, three types of polyolefin-based elastomers (PBEs) were adopted to toughen a high-flow polypropylene to improve its overall performance. The chain microstructures of these PBEs, including ethylene/1-octene (E/O) random copolymer from Dow Chemical′s polyolefin elastomer (POE), olefin block copolymers (OBCs) of E/O from Dow, and ethylene/propylene random copolymer from ExxonMobil’s propylene-based elastomer, were elucidated by GPC, 13C NMR, TREF, and DSC techniques. The mechanical, thermal and optical properties, and morphology analysis of the PP/PBE blends were also studied to investigate the toughening mechanism of these PBEs. The results showed that all three types of PBEs can effectively improve the Izod impact strength of the PP/PBE blends by the addition of the rubber compositions, at the cost of the stiffness. PBE-1 and PBE-2 were found to have a great stiffness–toughness balance with about 1700 MPa of flexural modulus, about 110 °C of HDT and 3.6 kJ/m2 of impact strength on the prepared PP/PBE blends by forming separated rubber phase and refined spherulite crystals. As a result, the OBC with alternating hard and soft segments could achieve a similar toughening effect as the E/P random copolymer. Surprisingly, no obvious rubber phase separation was observed in the PP/PBE-4 blend, which might be due to the good compatibility of the E/P random chains with the isotactic PP; therefore, the PP/PBE blend obtains great toughness performance and optical transparency with the highest Izod impact strength of 4.2 kJ/m2 and excellent transparency.
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Affiliation(s)
- Xiong Wang
- Lanzhou Petrochemical Research Center, Petrochemical Research Institute, PetroChina, Lanzhou 730060, China; (Y.G.); (G.L.); (R.X.)
- Correspondence:
| | - Sheng Hu
- College of Chemical and Chemical Engineering, Xi′an Shiyou University, Xi’an 710065, China;
| | - Yi Guo
- Lanzhou Petrochemical Research Center, Petrochemical Research Institute, PetroChina, Lanzhou 730060, China; (Y.G.); (G.L.); (R.X.)
| | - Guangquan Li
- Lanzhou Petrochemical Research Center, Petrochemical Research Institute, PetroChina, Lanzhou 730060, China; (Y.G.); (G.L.); (R.X.)
| | - Renwei Xu
- Lanzhou Petrochemical Research Center, Petrochemical Research Institute, PetroChina, Lanzhou 730060, China; (Y.G.); (G.L.); (R.X.)
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8
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Kang BH, Yang XY, Lu X. Effect of hollow glass microsphere on the flame retardancy and combustion behavior of intumescent flame retardant polypropylene composites. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-019-02953-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Wang J, Li P, Zhang Y, Liu Y, Wu W, Liu J. Porous Nafion nanofiber composite membrane with vertical pathways for efficient through-plane proton conduction. J Memb Sci 2019. [DOI: 10.1016/j.memsci.2019.05.041] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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Schawe JEK, Budde F, Alig I. Non-isothermal crystallization of polypropylene with sorbitol-type nucleating agents at cooling rates used in processing. POLYM INT 2018. [DOI: 10.1002/pi.5581] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | - Felix Budde
- Division Plastics; Fraunhofer Institute for Structural Durability and System Reliability LBF; Darmstadt Germany
| | - Ingo Alig
- Division Plastics; Fraunhofer Institute for Structural Durability and System Reliability LBF; Darmstadt Germany
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11
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Ndiripo A, Pasch H. A multidimensional fractionation protocol for the oligomer analysis of oxidized waxes. Anal Chim Acta 2018; 1027:137-148. [PMID: 29866263 DOI: 10.1016/j.aca.2018.03.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 02/28/2018] [Accepted: 03/02/2018] [Indexed: 11/29/2022]
Abstract
Oxidized waxes possess far superior properties as compared to the alkanes they are derived from. The separation of alkane oligomers via gas chromatography (GC) becomes a challenge when polar oxygen-containing functional groups are introduced or when higher molar masses are targeted. In the present study, the separation and analysis of oligomers in oxidized and non-oxidized waxes using different liquid chromatographic techniques are investigated. Oligomers in two oxidized waxes and a non-oxidized wax from which they are derived, are separated using high-temperature solvent gradient interaction chromatography (HT-SGIC) and high-temperature two-dimensional liquid chromatography (HT-2D-LC). Evaporative light scattering detector conditions are tailored to provide the best detection with the solvent system at use. It is shown that oligomers in oxidized and non-oxidized waxes can be separated and identified using the mentioned techniques. It has been found that the ELSD detector response systematically decreases as the oxidation levels of the waxes increase. Coupling of HT-HPLC and high-temperature size exclusion chromatography (HT-SEC) in a comprehensive 2D-LC setup shows a broadening of the molar mass distributions of the lower oligomer fractions as a consequence of the modification indicating changes in the oligomer chain microstructures. A preparative fractionation technique is utilized to collect specific oligomer fractions from the bulk waxes followed by hyphenation to HT-HPLC and other techniques. HPLC is shown to provide more detailed information on the oligomer composition of waxes when coupled to a pre-fractionation technique.
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Affiliation(s)
- Anthony Ndiripo
- Department of Chemistry and Polymer Science, University of Stellenbosch, 7602, Matieland, South Africa
| | - Harald Pasch
- Department of Chemistry and Polymer Science, University of Stellenbosch, 7602, Matieland, South Africa.
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12
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Niu Q, Zou C, Liu X, Wang R, He A. Isothermal crystallization fractionation and fraction characterization of trans-1,4-poly(isoprene-co-butadiene). POLYMER 2017. [DOI: 10.1016/j.polymer.2016.12.028] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Zhuravlev E, Schmelzer JWP, Androsch R, Schick C. Experimental Test of Tammann's Nuclei Development Approach in Crystallization of Macromolecules. INT POLYM PROC 2016. [DOI: 10.3139/217.3246] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
Prediction of the supermolecular structure and with that of properties of crystallizable polymers requires in-depth knowledge about the crystallization behavior, in particular the temperature-dependence of the nucleation kinetics. Typically, at low supercooling of the melt the nucleation rate/nuclei density often is assessed by optical microscopy, through an analysis of the evolution of the spherulitic superstructure. This approach fails if the nuclei density is too high, or if nuclei formation is not followed by growth due to chain-mobility constraints. In such cases, Tammann's two-stage crystal nuclei development method can be applied. It includes the formation of crystal nuclei at high supercooling of the melt, and their detection at higher temperature, after their growth to crystals. Though initially developed for analysis of low molecular mass compounds, this approach has recently also successfully been employed for analysis of the nucleation behavior of polymers, which is demonstrated here on the examples of poly (L-lactic acid) (PLLA), and poly (∊-caprolactone) (PCL). While in case of PLLA the ability to gain information about isothermal and non-isothermal nucleation is explained, in case of PCL new information about the thermal stability of nuclei is presented. The importance of such analyses in the context of understanding structure formation of polymers at processing-relevant cooling conditions is discussed.
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Affiliation(s)
- E. Zhuravlev
- Institute of Physics , University of Rostock, Rostock , Germany
- Competence Centre CALOR , Faculty of Interdisciplinary Research, University of Rostock, Rostock , Germany
| | | | - R. Androsch
- Center of Engineering Sciences , Martin Luther University Halle-Wittenberg, Halle/Saale , Germany
| | - C. Schick
- Institute of Physics , University of Rostock, Rostock , Germany
- Competence Centre CALOR , Faculty of Interdisciplinary Research, University of Rostock, Rostock , Germany
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14
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Cavallo D, Lorenzo AT, Müller AJ. Probing the early stages of thermal fractionation by successive self-nucleation and annealing performed with fast scanning chip-calorimetry. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/polb.24129] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Dario Cavallo
- Department of Chemistry and Industrial Chemistry; University of Genoa; via Dodecaneso 31 Genova 1646 Italy
| | | | - Alejandro J. Müller
- POLYMAT and Polymer Science and Technology Department; Faculty of Chemistry, University of the Basque Country, UPV/EHU; Paseo Manuel De Lardizabal 3 Donostia-San Sebastián 20018 Spain
- Basque Foundation for Science, IKERBASQUE; Bilbao Spain
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15
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Phiri MJ, Pasch H. Exploring the Compositional Heterogeneity of Vis-Broken Impact Poly(propylene) Copolymers by Advanced Fractionation Methods. MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201500470] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mohau Justice Phiri
- Department of Chemistry and Polymer Science; Stellenbosch University; 7602 Matieland South Africa
| | - Harald Pasch
- Department of Chemistry and Polymer Science; Stellenbosch University; 7602 Matieland South Africa
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16
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Hu W, Mathot VBF, Alamo RG, Gao H, Chen X. Crystallization of Statistical Copolymers. POLYMER CRYSTALLIZATION I 2016. [DOI: 10.1007/12_2016_349] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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17
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Ndiripo A, Pasch H. On the multimodality of preparative TREF fractionation as detected by advanced analytical methods. Anal Bioanal Chem 2015; 407:6493-503. [DOI: 10.1007/s00216-015-8814-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Revised: 05/27/2015] [Accepted: 05/28/2015] [Indexed: 11/24/2022]
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18
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Calibration curve establishment and fractionation temperature selection of polyethylene for preparative temperature rising elution fractionation. CHINESE JOURNAL OF POLYMER SCIENCE 2015. [DOI: 10.1007/s10118-015-1648-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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19
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Toughening with little rigidity loss and mechanism for modified polypropylene by polymer particles with core–shell structure. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.03.064] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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20
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High temperature size exclusion–liquid adsorption chromatography (HT-SEC–LAC): Full isocratic separation of parent isotactic polypropylene homopolymer from ethylene-propylene copolymers. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.03.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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21
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Wang J, He Y, Zhao L, Li Y, Cao S, Zhang B, Zhang H. Enhanced proton conductivities of nanofibrous composite membranes enabled by acid–base pairs under hydrated and anhydrous conditions. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2015.02.015] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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22
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Chen F, Qiu BW, Ye YN, Lv YH, Shangguan YG, Song YH, Zheng Q. Reconstruction of core-shell dispersed particles in impact polypropylene copolymer during extrusion. CHINESE JOURNAL OF POLYMER SCIENCE 2015. [DOI: 10.1007/s10118-015-1616-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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23
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Phiri MJ, Cheruthazhekatt S, Dimeska A, Pasch H. Molecular heterogeneity of ethylene-propylene rubbers: New insights through advanced crystallization-based and chromatographic techniques. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/pola.27512] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Mohau Justice Phiri
- Department of Chemistry and Polymer Science; Stellenbosch University; 7602 Matieland South Africa
| | - Sadiqali Cheruthazhekatt
- Department of Chemistry and Polymer Science; Stellenbosch University; 7602 Matieland South Africa
| | - Anita Dimeska
- Lummus Novolen Technology GmbH; Carl-Bosch_Str. 38 67056 Ludwigshafen Germany
| | - Harald Pasch
- Department of Chemistry and Polymer Science; Stellenbosch University; 7602 Matieland South Africa
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24
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Qiu B, Chen F, Lin Y, Shangguan Y, Zheng Q. Control of multilayered core–shell dispersed particles in HPP/EPR/EbP blends and its influences on crystallization and dynamic mechanical behavior. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.09.060] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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25
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Qiu B, Chen F, Shangguan Y, Zhang L, Lin Y, Zheng Q. Simultaneously enhancing strength and toughness for impact polypropylene copolymers by regulating the dispersed phase with high density polyethylene. RSC Adv 2014. [DOI: 10.1039/c4ra10682b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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26
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Defining the distribution of ethylene-propylene copolymer phases in heterophasic ethylene-propylene copolymers by a sequential xylene extraction method: Chemical and morphological analysis. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.08.066] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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27
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Botha L, Sinha P, Joubert S, Duveskog H, van Reenen A. Solution and solid-state NMR characterization of heterophasic propylene–ethylene copolymers (HEPC) with increasing ethylene content. Eur Polym J 2014. [DOI: 10.1016/j.eurpolymj.2014.07.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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28
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Tian Z, Feng LF, Fan ZQ, Hu GH. Ethylene–Propylene Segmented Copolymer as an in Situ Compatibilizer for Impact Polypropylene Copolymer: An Assessment of Rheology and Morphology. Ind Eng Chem Res 2014. [DOI: 10.1021/ie501222c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | | | - Guo-Hua Hu
- Laboratory
of Reactions and Process Engineering, ENSIC, Université de Lorraine−CNRS, 1 rue Grandville, BP20451, 54001 Nancy, France
- Institut
Universitaire de France, Maison des Universités, 103 Boulevard Saint-Michel, 75005 Paris, France
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29
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Liu YM, Tong ZZ, Xu JT, Fu ZS, Fan ZQ. A highly efficient β-nucleating agent for impact-resistant polypropylene copolymer. J Appl Polym Sci 2014. [DOI: 10.1002/app.40753] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Yi-Min Liu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering; Zhejiang University; Hangzhou 310027 China
| | - Zai-Zai Tong
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering; Zhejiang University; Hangzhou 310027 China
| | - Jun-Ting Xu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering; Zhejiang University; Hangzhou 310027 China
| | - Zhi-Sheng Fu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering; Zhejiang University; Hangzhou 310027 China
| | - Zhi-Qiang Fan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering; Zhejiang University; Hangzhou 310027 China
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30
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Cheruthazhekatt S, Pasch H. Fractionation and Characterization of Impact Poly(propylene) Copolymers by High Temperature Two-Dimensional Liquid Chromatography. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/masy.201450306] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sadiqali Cheruthazhekatt
- Department of Chemistry and Polymer Science; University of Stellenbosch; 7602 Matieland South Africa
| | - Harald Pasch
- Department of Chemistry and Polymer Science; University of Stellenbosch; 7602 Matieland South Africa
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31
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Cheruthazhekatt S, Pasch H. Preparative solution crystallization fractionation: a simple and rapid fractionation method for the chemical composition separation of complex ethylene-propylene copolymers. Anal Bioanal Chem 2014; 406:2999-3007. [DOI: 10.1007/s00216-014-7714-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2013] [Revised: 12/13/2013] [Accepted: 02/20/2014] [Indexed: 11/25/2022]
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32
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Zhuravlev E, Wurm A, Pötschke P, Androsch R, Schmelzer JW, Schick C. Kinetics of nucleation and crystallization of poly(ε-caprolactone) – Multiwalled carbon nanotube composites. Eur Polym J 2014. [DOI: 10.1016/j.eurpolymj.2013.12.015] [Citation(s) in RCA: 115] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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33
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Liu YM, Tong ZZ, Huang J, Zhou B, Xu JT, Fu ZS, Fan ZQ. Regulation of Phase Separation in PP/EPR In-Reactor Alloy and Its Effect on Crystallization Kinetics. Ind Eng Chem Res 2013. [DOI: 10.1021/ie402711f] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yi-Min Liu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China
| | - Zai-Zai Tong
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China
| | - Jie Huang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China
| | - Bing Zhou
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China
| | - Jun-Ting Xu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China
| | - Zhi-Sheng Fu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China
| | - Zhi-Qiang Fan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China
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Tian Z, Gu XP, Feng LF, Fan ZQ, Hu GH. An atmosphere-switching polymerization process: A novel strategy to advanced polyolefin materials. AIChE J 2013. [DOI: 10.1002/aic.14248] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zhou Tian
- State Key Laboratory of Chemical Engineering; Zhejiang University; Hangzhou 310027 P.R. China
| | - Xue-Ping Gu
- State Key Laboratory of Chemical Engineering; Zhejiang University; Hangzhou 310027 P.R. China
| | - Lian-Fang Feng
- State Key Laboratory of Chemical Engineering; Zhejiang University; Hangzhou 310027 P.R. China
| | - Zhi-Qiang Fan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization; Zhejiang University; Hangzhou 310027 P.R. China
| | - Guo-Hua Hu
- Laboratory of Reactions and Process Engineering; CNRSUniversité de Lorraine; ENSIC 1 rue Grandville BP 20451 54001 Nancy France
- Institut Universitaire de France; Maison des Universités; 103 Boulevard Saint-Michel 75005 Paris France
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35
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Cheruthazhekatt S, Pijpers TFJ, Mathot VBF, Pasch H. Preparative TREF - HT-HPLC - HPer DSC: Linking Molecular Characteristics and Thermal Properties of an Impact Poly(propylene) Copolymer. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/masy.201300005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sadiqali Cheruthazhekatt
- Department of Chemistry and Polymer Science; University of Stellenbosch; 7602; Matieland; South Africa
| | - Thijs F. J. Pijpers
- Department of Chemistry and Polymer Science; University of Stellenbosch; 7602; Matieland; South Africa
| | - Vincent B. F. Mathot
- Department of Chemistry and Polymer Science; University of Stellenbosch; 7602; Matieland; South Africa
| | - Harald Pasch
- Department of Chemistry and Polymer Science; University of Stellenbosch; 7602; Matieland; South Africa
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Cheruthazhekatt S, Pasch H. Improved chemical composition separation of ethylene–propylene random copolymers by high-temperature solvent gradient interaction chromatography. Anal Bioanal Chem 2013; 405:8607-14. [DOI: 10.1007/s00216-013-7252-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2013] [Revised: 07/02/2013] [Accepted: 07/11/2013] [Indexed: 11/29/2022]
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37
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Cheruthazhekatt S, Mayo N, Monrabal B, Pasch H. Chemical Composition Separation of EP Copolymers by CEF and HT-SGIC: Crystallization versus Adsorption. MACROMOL CHEM PHYS 2013. [DOI: 10.1002/macp.201300302] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sadiqali Cheruthazhekatt
- Department of Chemistry and Polymer Science; University of Stellenbosch; 7602 Matieland South Africa
| | - Nuria Mayo
- Polymer Char; S. A. Gustave Eiffel 8 Paterna, Valencia Technology Park E-46980 Spain
| | - Benjamin Monrabal
- Polymer Char; S. A. Gustave Eiffel 8 Paterna, Valencia Technology Park E-46980 Spain
| | - Harald Pasch
- Department of Chemistry and Polymer Science; University of Stellenbosch; 7602 Matieland South Africa
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Cheruthazhekatt S, Robertson DD, Brand M, van Reenen A, Pasch H. Solution Crystallization and Dissolution of Polyolefins as Monitored by a Unique Analytical Tool: Solution Crystallization Analysis by Laser Light Scattering. Anal Chem 2013; 85:7019-23. [DOI: 10.1021/ac401700p] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sadiqali Cheruthazhekatt
- Department of Chemistry and Polymer Science, University of Stellenbosch, 7602 Matieland, South Africa
| | - Divann D. Robertson
- Department of Chemistry and Polymer Science, University of Stellenbosch, 7602 Matieland, South Africa
| | - Margaretha Brand
- Department of Chemistry and Polymer Science, University of Stellenbosch, 7602 Matieland, South Africa
| | - Albert van Reenen
- Department of Chemistry and Polymer Science, University of Stellenbosch, 7602 Matieland, South Africa
| | - Harald Pasch
- Department of Chemistry and Polymer Science, University of Stellenbosch, 7602 Matieland, South Africa
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39
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Gahleitner M, Tranninger C, Doshev P. Heterophasic copolymers of polypropylene: Development, design principles, and future challenges. J Appl Polym Sci 2013. [DOI: 10.1002/app.39626] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Markus Gahleitner
- Borealis Polyolefine GmbH; Innovation Headquarters, Sankt Peterstrasse 25; 4021; Linz; Austria
| | - Cornelia Tranninger
- Borealis Polyolefine GmbH; Innovation Headquarters, Sankt Peterstrasse 25; 4021; Linz; Austria
| | - Petar Doshev
- Borealis Polyolefine GmbH; Innovation Headquarters, Sankt Peterstrasse 25; 4021; Linz; Austria
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40
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Combination of TREF, high-temperature HPLC, FTIR and HPer DSC for the comprehensive analysis of complex polypropylene copolymers. Anal Bioanal Chem 2013; 405:8995-9007. [DOI: 10.1007/s00216-013-6955-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Revised: 03/13/2013] [Accepted: 03/27/2013] [Indexed: 10/26/2022]
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41
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Cheruthazhekatt S, Harding GW, Pasch H. Comprehensive high temperature two-dimensional liquid chromatography combined with high temperature gradient chromatography-infrared spectroscopy for the analysis of impact polypropylene copolymers. J Chromatogr A 2013; 1286:69-82. [DOI: 10.1016/j.chroma.2013.02.052] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2012] [Revised: 01/28/2013] [Accepted: 02/18/2013] [Indexed: 10/27/2022]
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