1
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Mehdizadeh M, Karkhaneh F, Nekoomanesh M, Sadjadi S, Emami M, Teimoury H, Salimi M, Solà M, Poater A, Bahri-Laleh N, Posada-Pérez S. Influence of the Ethanol Content of Adduct on the Comonomer Incorporation of Related Ziegler-Natta Catalysts in Propylene (Co)polymerizations. Polymers (Basel) 2023; 15:4476. [PMID: 38231935 PMCID: PMC10708330 DOI: 10.3390/polym15234476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 10/29/2023] [Accepted: 11/03/2023] [Indexed: 01/19/2024] Open
Abstract
The aim of this work is to investigate the influence of the ethanol content of adducts on the catalytic behavior of related Ziegler-Natta (ZN) catalysts in propylene homo- and copolymerizations (with 1-hexene comonomer) in terms of activity, isotacticity, H2 response, and comonomer incorporation. For this purpose, three MgCl2.nEtOH adducts with n values of 0.7, 1.2, and 2.8 were synthesized and used in the synthesis of related ZN catalysts. The catalysts were thoroughly characterized using XRD, BET, SEM, EDX, N2 adsorption-desorption, and DFT techniques. Additionally, the microstructure of the synthesized (co)polymers was distinguished via DSC, SSA, and TREF techniques. Their activity was found to enhance with the adduct's ethanol content in both homo- and copolymerization experiments, and the increase was more pronounced in homopolymerization reactions in the absence of H2. Furthermore, the catalyst with the highest ethanol content provided a copolymer with a lower isotacticity index, a shorter meso sequence length, and a more uniform distribution of comonomer within the chains. These results were attributed to the higher total surface area and Ti content of the corresponding catalyst, as well as its lower average pore diameter, a larger proportion of large pores compared to the other two catalysts, and its spherical open bud morphology. It affirms the importance of catalyst/support ethanol-content control during the preparation process. Then, molecular simulation was employed to shed light on the iso-specificity of the polypropylene produced via synthesized catalysts.
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Affiliation(s)
- Mohammadreza Mehdizadeh
- Iran Polymer and Petrochemical Institute (IPPI), Tehran 14965/115, Iran; (M.M.); (M.N.); (S.S.); (M.E.)
| | - Fereshteh Karkhaneh
- Iran Polymer and Petrochemical Institute (IPPI), Tehran 14965/115, Iran; (M.M.); (M.N.); (S.S.); (M.E.)
| | - Mehdi Nekoomanesh
- Iran Polymer and Petrochemical Institute (IPPI), Tehran 14965/115, Iran; (M.M.); (M.N.); (S.S.); (M.E.)
| | - Samahe Sadjadi
- Iran Polymer and Petrochemical Institute (IPPI), Tehran 14965/115, Iran; (M.M.); (M.N.); (S.S.); (M.E.)
| | - Mehrsa Emami
- Iran Polymer and Petrochemical Institute (IPPI), Tehran 14965/115, Iran; (M.M.); (M.N.); (S.S.); (M.E.)
| | - HamidReza Teimoury
- Research & Development Center, Kermanshah Polymer Company, Kermanshah 14965/115, Iran; (H.T.); (M.S.)
| | - Mehrdad Salimi
- Research & Development Center, Kermanshah Polymer Company, Kermanshah 14965/115, Iran; (H.T.); (M.S.)
| | - Miquel Solà
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, c/ Maria Aurèlia Capmany 69, 17003 Girona, Spain;
| | - Albert Poater
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, c/ Maria Aurèlia Capmany 69, 17003 Girona, Spain;
| | - Naeimeh Bahri-Laleh
- Iran Polymer and Petrochemical Institute (IPPI), Tehran 14965/115, Iran; (M.M.); (M.N.); (S.S.); (M.E.)
| | - Sergio Posada-Pérez
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, c/ Maria Aurèlia Capmany 69, 17003 Girona, Spain;
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2
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Lu Y, Lyu D, Zhao X, Men Y. Influence of Molecular Weight on the Nucleation and Growth of Different Crystal Forms in Isotactic Polypropylene: In Situ Synchrotron Microfocus X-Ray Scattering Combined with Fast-Scanning Chip Calorimetry Investigations. Macromolecules 2023. [DOI: 10.1021/acs.macromol.3c00054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
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3
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Li H, Ye Q, Sun J, Cui S, Zhang Z, Liu C, Shen C, Wang Z. A combined melt-stretching and quenching setup for experimental studies of polymer crystallization under complex flow-temperature environments. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2023; 94:015102. [PMID: 36725543 DOI: 10.1063/5.0130699] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 12/05/2022] [Indexed: 06/18/2023]
Abstract
A combined melt-stretching and quenching setup is designed and developed to allow experimental investigations of polymer crystallization under the complex flow-temperature environments comparable to those encountered in the actual industrial processing. The melt-stretching proceeds by two drums rotating in the opposite directions with simultaneous recording of a stress-strain curve, where the Hencky strain and strain rate (≤233 s-1) are adjustable over a large range. After stretching, liquid N2 is used as a cooling medium to quench the free-standing melt, which is sprayed directly to the deformed melt driven by an electric pump. To ensure a high cooling efficiency, a three-way solenoid valve is employed to execute a sequential control of the liquid N2 flow direction to reduce the boil-off of liquid N2 before entering the sample chamber. The melt cooling rate depends on the liquid N2 flow rate controlled by a flow valve, which is up to 221 °C/s when quenching the isotactic polypropylene (iPP) melt with a thickness of 0.28 mm at 150 °C. Two independent temperature control modules are designed to meet the requirements of different stages of melt-stretching and quenching. To verify the capability of the setup, we have performed the melt-stretching and quenching experiments on iPP samples. The setup is demonstrated to be a valuable new tool to study polymer crystallization under coupled flow-cooling fields.
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Affiliation(s)
- Hanchuan Li
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, Zhengzhou University, Zhengzhou 450002, China
| | - Qiuyang Ye
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, Zhengzhou University, Zhengzhou 450002, China
| | - Jiahui Sun
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, Zhengzhou University, Zhengzhou 450002, China
| | - Shanlin Cui
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, Zhengzhou University, Zhengzhou 450002, China
| | - Zhen Zhang
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, Zhengzhou University, Zhengzhou 450002, China
| | - Chuntai Liu
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, Zhengzhou University, Zhengzhou 450002, China
| | - Changyu Shen
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, Zhengzhou University, Zhengzhou 450002, China
| | - Zhen Wang
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, Zhengzhou University, Zhengzhou 450002, China
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4
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Gong Y, Zhang W, Larson RG. Interfacial Oriented Precursor to Secondary Nucleation of Alkane Oligomer Crystals Revealed by Molecular Dynamic Simulations. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yanan Gong
- Department of Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Wenlin Zhang
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755, United States
| | - Ronald G. Larson
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
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5
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Enthalpy relaxation of unconstrained and constrained amorphous phase for low isotacticity polypropylene. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124991] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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6
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Rahmanian V, Galeski A. Cavitation in strained polyethylene/nanographene nanocomposites. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.124158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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7
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Shen J, Zhu D, An J, Min Z, Chen J. Investigation of the Ordered Structure in Partially Melted Isotactic Polypropylene. Polymers (Basel) 2021; 13:3354. [PMID: 34641169 PMCID: PMC8512394 DOI: 10.3390/polym13193354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Revised: 09/26/2021] [Accepted: 09/27/2021] [Indexed: 11/16/2022] Open
Abstract
The ordered structure of partially melted isotactic polypropylene (iPP) was investigated using polarized optical microscopy (POM) and small-/wide-angle X-ray scattering (SAXS/WAXS) measurements. The crystalline morphology was first examined by means of pulling a glass fiber through the iPP melt, which was generated by partially melting a preformed spherulite. The results from the POM experiments indicated that, even at a minimal pulling rate, the surviving ordered structure could also relocate along the direction of fiber pulling and grow into cylindrites eventually. In addition, during the quiescent crystallization from the partially melted sample, which had the same thermal history of fiber-pulling experiments, the obvious memory effect of melt was also observed from the results of X-ray experiments. Moreover, the SAXS profile derived from the partially melted iPP at 170 °C was fitted by the theory of scattering amplitude with the cylindrical form factor. The fit result implied that the surviving ordered structure is of cylindrical nanocrystals with a diameter D ≈ 30 ± 3 nm and height h ≈ 45 ± 3 nm, which can significantly influence the crystallization morphology and kinetics during the subsequent crystallization process.
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Affiliation(s)
- Junfang Shen
- School of Materials Science and Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China; (J.S.); (J.A.)
- Henan Intelligent Manufacturing Engineering Technology Research Center for Building Profile, Luoyang 471023, China
| | - Derong Zhu
- School of Intelligent Manufacturing, Luoyang Institute of Science and Technology, Luoyang 471023, China
| | - Junchao An
- School of Materials Science and Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China; (J.S.); (J.A.)
- Henan Intelligent Manufacturing Engineering Technology Research Center for Building Profile, Luoyang 471023, China
| | - Zhiyu Min
- School of Materials Science and Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China; (J.S.); (J.A.)
- Henan Intelligent Manufacturing Engineering Technology Research Center for Building Profile, Luoyang 471023, China
| | - Jingbo Chen
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China;
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8
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Ma Y, He A, Liu C. Crystallization kinetics, crystalline structures and properties of PB/PP blends regulated by poly(butene-block-propylene) copolymers. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123901] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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9
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Zhao X, Liao T, Lu Y, Jiang Z, Men Y. Formation and Distribution of the Mesophase in Ultrasonic Micro-Injection-Molded Isotactic Polypropylene. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00077] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xintong Zhao
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, PR China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, PR China
| | - Tao Liao
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, PR China
| | - Ying Lu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, PR China
| | - Zhiyong Jiang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, PR China
| | - Yongfeng Men
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, PR China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, PR China
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10
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Towards a better understanding of the crystallization and melting behaviors of high-density polyethylene samples prepared from quasi-isothermal and stretching oriented localized melts. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123485] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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11
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Crystalline grain refinement toughened isotactic polypropylene through rapid quenching of stretched melt. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123435] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Xu G, Ding L, Wu T, Yang F, Xiang M. Effect of molecular weight and isotacticity distribution on hard elastic polypropylene cast films and membranes. POLYM INT 2021. [DOI: 10.1002/pi.6117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Guan Xu
- State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu China
| | - Lei Ding
- State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu China
| | - Tong Wu
- College of Polymer Science and Engineering Sichuan University Chengdu China
| | - Feng Yang
- State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu China
| | - Ming Xiang
- State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu China
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13
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Structural Evolution of LLDPE-LMW/HMW Blend during Uniaxial Deformation as Revealed by In Situ Synchrotron Radiation X-ray Scattering. CHINESE JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1007/s10118-020-2458-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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14
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Weijiao Jiang, Song Y, Song X, Zhang Y, Hu B, Liang Z, Chen X, Chen Z, Kang J, Cao Y, Xiang M. Influences of Molecular Structure on the Non-Isothermal Crystallization Behavior of β-Nucleated Isotactic Polypropylene. POLYMER SCIENCE SERIES A 2020. [DOI: 10.1134/s0965545x20330032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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The structure changes of polypropylene precursor film with different die draw ratio during annealing. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122958] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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16
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Wang B, He K, Lu Y, Zhou Y, Chen J, Shen C, Chen J, Men Y, Zhang B. Nucleation Mechanism for Form II to I Polymorphic Transformation in Polybutene-1. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00885] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Binghua Wang
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Kangzhu He
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Yaguang Lu
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Yufeng Zhou
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Jinlong Chen
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Changyu Shen
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Jingbo Chen
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Yongfeng Men
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Bin Zhang
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
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17
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Galeski A, Bartczak Z, Vozniak A, Pawlak A, Walkenhorst R. Morphology and Plastic Yielding of Ultrahigh Molecular Weight Polyethylene. Macromolecules 2020; 53:6063-6077. [PMID: 32905184 PMCID: PMC7467761 DOI: 10.1021/acs.macromol.9b02154] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 06/25/2020] [Indexed: 12/28/2022]
Abstract
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The structure, morphology, and mechanical
properties of two compression-molded grades of ultrahigh-molecular-weight
polyethylene (UHMWPE) and, for comparison, one conventional linear
polyethylene (HDPE) were studied. Compression molding resulted in
some preferred orientation of lamellae in the compression direction
in UHMWPE samples, while no preferred orientation in HDPE. The mean
crystal thickness estimated from the size distribution agrees better
with those obtained from small-angle X-ray scattering (SAXS) and mechanical
yield data than the thickness determined from the melting peak temperature.
Microscopic examination of microtomed and etched UHMWPE samples showed
that the lamellae are in the form of platelets with the width and
length in the range of 300–700 nm. The lamellae radiate from
primary nuclei forming small embryonal spherulites; their radial growth
ends at 0.3–0.7 μm from the center. There is no evidence
of branching and secondary nucleation from those primary lamellae.
Because the lamellae are radially ordered, there is no parallel stacking
of lamellae. Samples were subjected to deformation by plane-strain
compression at a constant true strain rate. In axial UHMWPE samples,
where lamellae were preferentially oriented along the loading direction,
the second yield was clearly observed. The second yield was found
to be related to the deformation instability leading to kinking of
lamellae oriented initially along the loading direction. Kinking was
clearly shown by SAXS and microscopic observation of microtomed and
etched samples. No cooperativity of kinking was observed because the
lamellae are arranged in small spherulites and not parallel in stacks.
The stress–strain curves were fitted with model curves assuming
crystal plasticity and network elasticity in the amorphous component.
The effective density of the molecular network within the amorphous
phase depended on the molecular weight of UHMWPE.
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Affiliation(s)
- Andrzej Galeski
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Zbigniew Bartczak
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Alina Vozniak
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Andrzej Pawlak
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Rainer Walkenhorst
- Celanese GmbH Industriepark Höchst, Brüningstr. 50, Building G832, 65926 Frankfurt am Main, Germany
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18
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Jiang W, Song X, Zhou R, Wu Z, Hu B, Zhang Y, Liang Z, Chen Z, Kang J, Xiang M. Influences of molecular structure on the isothermal crystallization behavior and mechanical properties of β-nucleated isotactic polypropylene. POLYM-PLAST TECH MAT 2020. [DOI: 10.1080/25740881.2020.1765388] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Weijiao Jiang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, China
| | - Xiuduo Song
- Key Laboratory of Combustion and Explosion Technology, Xi’ an Modern Chemistry Research Institute, Xi’ An, China
| | - Rui Zhou
- Key Laboratory of Combustion and Explosion Technology, Xi’ an Modern Chemistry Research Institute, Xi’ An, China
| | - Zongkai Wu
- Key Laboratory of Combustion and Explosion Technology, Xi’ an Modern Chemistry Research Institute, Xi’ An, China
| | - Bo Hu
- Dongfang Electric Machinery Co., Ltd., Deyang, China
| | - Yue Zhang
- Dongfang Electric Machinery Co., Ltd., Deyang, China
| | - Zhiming Liang
- Dongfang Electric Machinery Co., Ltd., Deyang, China
| | - Zhengfang Chen
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, China
| | - Jian Kang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, China
| | - Ming Xiang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, China
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19
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Chen PH, Lin SJ, Tsai JC, Jeng US, Su AC. Equilibrium Melting Temperature Depression in Syndiotactic Poly(styrene- stat-3-methylstyrene) and Poly(styrene- stat-4-methylstyrene). Macromolecules 2020. [DOI: 10.1021/acs.macromol.9b01831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Po-Hsun Chen
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu30013, Taiwan
| | - Shi-Jie Lin
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu30013, Taiwan
| | - Jing-Cherng Tsai
- Department of Chemical Engineering, National Chung Cheng University, Chiayi62102, Taiwan
| | - U-Ser Jeng
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu30013, Taiwan
- National Synchrotron Radiation Research Center, Science Park, Hsinchu 30076, Taiwan
| | - An-Chung Su
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu30013, Taiwan
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20
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Falk YZ, Runnsjö A, Pettigrew A, Scherer D, Engblom J, Kocherbitov V. Interactions of Perfluorohexyloctane With Polyethylene and Polypropylene Pharmaceutical Packaging Materials. J Pharm Sci 2020; 109:2180-2188. [PMID: 32240694 DOI: 10.1016/j.xphs.2020.03.026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 03/19/2020] [Accepted: 03/25/2020] [Indexed: 11/19/2022]
Abstract
Semifluorinated alkanes (SFAs) are aprotic solvents, which may be used as drug solvents for topical ocular applications, for instance, in dry eye syndrome. Their physical properties suggest that they might be prone to interaction with plastic materials, such as, polyethylene (PE) and polypropylene (PP), which are commonly used as packaging materials for pharmaceutical products. In this study, we investigate interactions of PE and PP with a liquid SFA perfluorohexyloctane (PFHO) using differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and cross-polarized light microscopy. Binary phase diagrams of PFHO-PE and PFHO-PP systems demonstrating interactions of PFHO with the polymeric materials were constructed based on DSC data. According to this data, PFHO tends to lower the melting temperatures of PE and PP. The equilibrium values of solubilities of the polymers in PFHO and PFHO in the polymers were obtained by extrapolation of melting enthalpy data. Absorption of PFHO by PE and PP materials at ambient conditions after 4 weeks of equilibration was also studied by TGA. From the presented results, it may be concluded that thorough studies of interactions of PE or PP with SFAs are required when these materials are used as packaging components in SFA-based formulations.
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Affiliation(s)
- Yana Znamenskaya Falk
- Biomedical Science, Faculty of Health and Society, Malmö University, SE-205 06 Malmö, Sweden; Biofilms - Research Center for Biointerfaces, Malmö University, SE-205 06 Malmö, Sweden
| | - Anna Runnsjö
- Biomedical Science, Faculty of Health and Society, Malmö University, SE-205 06 Malmö, Sweden; Biofilms - Research Center for Biointerfaces, Malmö University, SE-205 06 Malmö, Sweden
| | | | | | - Johan Engblom
- Biomedical Science, Faculty of Health and Society, Malmö University, SE-205 06 Malmö, Sweden; Biofilms - Research Center for Biointerfaces, Malmö University, SE-205 06 Malmö, Sweden
| | - Vitaly Kocherbitov
- Biomedical Science, Faculty of Health and Society, Malmö University, SE-205 06 Malmö, Sweden; Biofilms - Research Center for Biointerfaces, Malmö University, SE-205 06 Malmö, Sweden.
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21
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Shen J, Zhou Y, Lu Y, Wang B, Shen C, Chen J, Zhang B. Later Stage Melting of Isotactic Polypropylene. Macromolecules 2020. [DOI: 10.1021/acs.macromol.9b01880] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Junfang Shen
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Yufeng Zhou
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Yaguang Lu
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Binghua Wang
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Changyu Shen
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Jingbo Chen
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Bin Zhang
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
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22
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Furushima Y, Nakada M, Masuda A, Okada K, Iwata N, Ohkura M. Isothermal crystallization kinetics, morphology, and crystalline structure of polypropylene/poly(4‐methyl‐1‐pentene) blends. POLYMER CRYSTALLIZATION 2020. [DOI: 10.1002/pcr2.10102] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
| | - Masaru Nakada
- Research LaboratoriesToray Research Center Inc. Shiga Japan
| | - Akihiro Masuda
- Research LaboratoriesToray Research Center Inc. Shiga Japan
| | - Kazuma Okada
- Films and Film Products Research LaboratoriesToray Industries Shiga Japan
| | - Naoko Iwata
- Films and Film Products Research LaboratoriesToray Industries Shiga Japan
| | - Masatoshi Ohkura
- Films and Film Products Research LaboratoriesToray Industries Shiga Japan
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23
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Yin X, Qin Y, Dong JY. Investigation of Chain Microstructure of Polypropylene Polymerized by Ziegler–Natta Catalysts with Diester and Diether Compound as Internal Donor via Hydrogen Chain Transfer. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.9b05888] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xuemin Yin
- CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yawei Qin
- CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jin-Yong Dong
- CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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24
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Domingues MLB, Bocca JR, Fávaro SL, Radovanovic E. Disposable coffee capsules as a source of recycled polypropylene. POLIMEROS 2020. [DOI: 10.1590/0104-1428.05518] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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25
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Miwa Y, Yamada M, Shinke Y, Kutsumizu S. Autonomous self-healing polyisoprene elastomers with high modulus and good toughness based on the synergy of dynamic ionic crosslinks and highly disordered crystals. Polym Chem 2020. [DOI: 10.1039/d0py01034k] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
We designed a novel polyisoprene elastomer with high mechanical properties and autonomous self-healing capability at room temperature facilitated by the coexistence of dynamic ionic crosslinks and crystalline components that slowly reassembled.
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Affiliation(s)
- Yohei Miwa
- Department of Chemistry and Biomolecular Science
- Faculty of Engineering
- Gifu University
- Gifu 501-1193
- Japan
| | - Mayu Yamada
- Department of Chemistry and Biomolecular Science
- Faculty of Engineering
- Gifu University
- Gifu 501-1193
- Japan
| | - Yu Shinke
- The Yokohama Rubber Co
- Ltd
- Hiratsuka
- Japan
| | - Shoichi Kutsumizu
- Department of Chemistry and Biomolecular Science
- Faculty of Engineering
- Gifu University
- Gifu 501-1193
- Japan
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26
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Single-chain folding of a quenched isotactic polypropylene chain through united atom molecular dynamics simulations. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.121861] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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27
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Wu GG, Ding C, Chen WB, Zhang Y, Yang W, Yang MB. Effect of the content of β form crystals on biaxially stretched polypropylene microporous membranes and the tuning of pore structures. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.05.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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28
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Rungswang W, Jarumaneeroj C, Patthamasang S, Phiriyawirut P, Jirasukho P, Soontaranon S, Rugmai S, Hsiao BS. Influences of tacticity and molecular weight on crystallization kinetic and crystal morphology under isothermal crystallization: Evidence of tapering in lamellar width. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.03.052] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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29
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Li C, Zhang Y, Leng J, He B, Chen X. Synergistic Toughening Effect of Nucleating Agent and Annealing Treatment and Morphological Research on Block Copolymerization Polypropylene. POLYM-PLAST TECH MAT 2019. [DOI: 10.1080/03602559.2018.1466333] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Caili Li
- College of Chemistry, Sichuan University, Chengdu, Sichuan, P.R. China
| | - Yake Zhang
- College of Chemistry, Sichuan University, Chengdu, Sichuan, P.R. China
| | - Jinhua Leng
- Materials Quality Supervision & Inspection Research Center, Chongqing Academy of Metrology and Quality Inspection, Chongqing, P.R. China
| | - Bobing He
- College of Chemistry, Sichuan University, Chengdu, Sichuan, P.R. China
| | - Xian Chen
- College of Chemistry, Sichuan University, Chengdu, Sichuan, P.R. China
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30
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Chen Q, Milner ST. Effects of Anisotropy and Disorder on Crystal–Melt Tensions in Polyolefins. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01248] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Qin Chen
- Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Scott T. Milner
- Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
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31
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Material properties of ultra-high molecular weight polyethylene: Comparison of tension, compression, nanomechanics and microstructure across clinical formulations. J Mech Behav Biomed Mater 2018; 83:9-19. [DOI: 10.1016/j.jmbbm.2018.03.029] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 03/21/2018] [Accepted: 03/26/2018] [Indexed: 11/17/2022]
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32
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Zhang W, Larson RG. Direct All-Atom Molecular Dynamics Simulations of the Effects of Short Chain Branching on Polyethylene Oligomer Crystal Nucleation. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00958] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Wenlin Zhang
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Ronald G. Larson
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
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33
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Nazari B, Tran H, Beauregard B, Flynn-Hepford M, Harrell D, Milner ST, Colby RH. Two Distinct Morphologies for Semicrystalline Isotactic Polypropylene Crystallized after Shear Flow. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00563] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
| | | | | | | | - Douglas Harrell
- The Phillips
66
Company, Linden, New Jersey 07036, United States
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34
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Teymouri Y, Adams A, Blümich B. Impact of Exposure Conditions on the Morphology of Polyethylene by Compact NMR. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/masy.201600156] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Yadollah Teymouri
- Y. Teymouri, A. Adams, B. Blümich; Institute für Technische und Makromolekulare Chemie; RWTH Aachen University; Worringerweg 2 D-52074, Aachen Germany
| | - Alina Adams
- Y. Teymouri, A. Adams, B. Blümich; Institute für Technische und Makromolekulare Chemie; RWTH Aachen University; Worringerweg 2 D-52074, Aachen Germany
| | - Bernhard Blümich
- Y. Teymouri, A. Adams, B. Blümich; Institute für Technische und Makromolekulare Chemie; RWTH Aachen University; Worringerweg 2 D-52074, Aachen Germany
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35
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Wang H, Wu CJ, Cui DM, Men YF. Equilibrium Crystallization Temperature of Syndiotactic Polystyrene γ Form. CHINESE JOURNAL OF POLYMER SCIENCE 2018. [DOI: 10.1007/s10118-018-2059-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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36
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Influences of the chemical defects on the crystal thickness and their melting of isothermally crystallized isotactic polypropylene. JOURNAL OF POLYMER RESEARCH 2017. [DOI: 10.1007/s10965-017-1304-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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37
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Hiejima Y, Takeda K, Nitta KH. Investigation of the Molecular Mechanisms of Melting and Crystallization of Isotactic Polypropylene by in Situ Raman Spectroscopy. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00229] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yusuke Hiejima
- Department of Chemical
and
Materials Science, Kanazawa University, Kakuma Campus, Kanazawa 920-1192, Japan
| | - Kento Takeda
- Department of Chemical
and
Materials Science, Kanazawa University, Kakuma Campus, Kanazawa 920-1192, Japan
| | - Koh-hei Nitta
- Department of Chemical
and
Materials Science, Kanazawa University, Kakuma Campus, Kanazawa 920-1192, Japan
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38
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Chen Q, Kozuch D, Milner ST. “Plunger” Method for Simulating Crystal–Melt Interfacial Free Energies. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00421] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Qin Chen
- Department
of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Daniel Kozuch
- Department
of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, United States
| | - Scott T. Milner
- Department
of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
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39
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Lu Y, Wang Y, Chen R, Men Y. Crystallization and melting of isotactic polypropylene crystallized from quiescent melt and stress-induced localized melt. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/polb.24345] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ying Lu
- State Key Laboratory of Polymer Physics and Chemistry; Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, University of Chinese Academy of Sciences; Changchun 130022 People's Republic of China
| | - Yaotao Wang
- State Key Laboratory of Polymer Physics and Chemistry; Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, University of Chinese Academy of Sciences; Changchun 130022 People's Republic of China
| | - Ran Chen
- State Key Laboratory of Polymer Physics and Chemistry; Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, University of Chinese Academy of Sciences; Changchun 130022 People's Republic of China
| | - Yongfeng Men
- State Key Laboratory of Polymer Physics and Chemistry; Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, University of Chinese Academy of Sciences; Changchun 130022 People's Republic of China
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40
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Zhou Q, Xu H, Wang A, Ma Z, Li H, Zhang L, Hu Y. Polypropylene with high melt flow rate and high isotacticity prepared by phosphate-mixed external donors. J Appl Polym Sci 2017. [DOI: 10.1002/app.44704] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Qian Zhou
- College of Chemistry and Chemical Engineering; University of Chinese Academy of Sciences; Beijing 100049 China
| | - Hao Xu
- College of Chemistry and Chemical Engineering; University of Chinese Academy of Sciences; Beijing 100049 China
| | - Ailian Wang
- College of Chemistry and Chemical Engineering; University of Chinese Academy of Sciences; Beijing 100049 China
| | - Zhifeng Ma
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering Plastics; Institute of Chemistry Chinese Academy of Sciences; Beijing 100190 China
| | - Huayi Li
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering Plastics; Institute of Chemistry Chinese Academy of Sciences; Beijing 100190 China
| | - Liaoyun Zhang
- College of Chemistry and Chemical Engineering; University of Chinese Academy of Sciences; Beijing 100049 China
| | - Youliang Hu
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering Plastics; Institute of Chemistry Chinese Academy of Sciences; Beijing 100190 China
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41
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Ding C, Zhang G, Gu J, Cao F, Zheng X. Application of the correct design of successive self-nucleation and annealing (SSA) to study the stereo-defects and its distribution of homo- and co-polypropylene. RSC Adv 2017. [DOI: 10.1039/c7ra03301j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The SSA revealed the differences in molecular chain microstructure of different PP samples when the preliminary characterization found that the homo-polypropylene or co-polypropylene samples had the similar mechanical and thermal properties.
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Affiliation(s)
- Cong Ding
- College of Science
- Huazhong Agricultural University
- Wuhan
- China
| | - Geng Zhang
- College of Science
- Huazhong Agricultural University
- Wuhan
- China
| | - Jiangjiang Gu
- College of Science
- Huazhong Agricultural University
- Wuhan
- China
| | - Feifei Cao
- College of Science
- Huazhong Agricultural University
- Wuhan
- China
| | - Xinsheng Zheng
- College of Science
- Huazhong Agricultural University
- Wuhan
- China
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42
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Romanos NA, Theodorou DN. Melting Point and Solid–Liquid Coexistence Properties of α1 Isotactic Polypropylene as Functions of Its Molar Mass: A Molecular Dynamics Study. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00819] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nikolaos A. Romanos
- School of Chemical Engineering, Department of Materials Science & Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou Campus, 157 80 Athens, Greece
| | - Doros N. Theodorou
- School of Chemical Engineering, Department of Materials Science & Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou Campus, 157 80 Athens, Greece
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43
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Zhou Q, Wang A, Li H, Luo Z, Zheng T, Zhang L, Hu Y. Microstructure of polypropylene and active center in Ziegler–Natta catalyst: effect of novel salicylate internal donor. RSC Adv 2016. [DOI: 10.1039/c6ra13819e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The volume of ecofriendly salicylate internal donors for propylene polymerization has an important impact on the catalyst active centers and microstructure of polypropylene.
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Affiliation(s)
- Qian Zhou
- College of Chemistry and Chemical Engineering
- University of Chinese Academy of Sciences
- Beijing 100049
- China
| | - Ailian Wang
- College of Chemistry and Chemical Engineering
- University of Chinese Academy of Sciences
- Beijing 100049
- China
| | - Huayi Li
- Beijing National Laboratory for Molecular Sciences
- CAS Key Laboratory of Engineering Plastics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Zhi Luo
- College of Chemistry and Chemical Engineering
- University of Chinese Academy of Sciences
- Beijing 100049
- China
| | - Tao Zheng
- College of Chemistry and Chemical Engineering
- University of Chinese Academy of Sciences
- Beijing 100049
- China
| | - Liaoyun Zhang
- College of Chemistry and Chemical Engineering
- University of Chinese Academy of Sciences
- Beijing 100049
- China
| | - Youliang Hu
- Beijing National Laboratory for Molecular Sciences
- CAS Key Laboratory of Engineering Plastics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
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44
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Caelers H, Govaert L, Peters G. The prediction of mechanical performance of isotactic polypropylene on the basis of processing conditions. POLYMER 2016. [DOI: 10.1016/j.polymer.2015.12.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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45
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Chen Q, Sirota EB, Zhang M, Chung TCM, Milner ST. Free Surfaces Overcome Superheating in Simulated Melting of Isotactic Polypropylene. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b02030] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Eric B. Sirota
- ExxonMobil Research and Engineering, 1545 Route 22 East, Annandale, New Jersey 08809, United States
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46
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Hamad FG, Colby RH, Milner ST. Lifetime of Flow-Induced Precursors in Isotactic Polypropylene. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01408] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Fawzi G. Hamad
- Department of Chemical Engineering and ‡Department of Materials Science
and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Ralph H. Colby
- Department of Chemical Engineering and ‡Department of Materials Science
and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Scott T. Milner
- Department of Chemical Engineering and ‡Department of Materials Science
and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
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47
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Gómez-Elvira J, Benavente R, Martínez M. Correlation between chain microstructure and activation energy in the pyrolysis of a high molecular weight isotactic polypropylene. Polym Degrad Stab 2015. [DOI: 10.1016/j.polymdegradstab.2015.03.024] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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48
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Hamad FG, Colby RH, Milner ST. Onset of Flow-Induced Crystallization Kinetics of Highly Isotactic Polypropylene. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00386] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Fawzi G. Hamad
- Department of Chemical Engineering and ‡Department of Materials Science
and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Ralph H. Colby
- Department of Chemical Engineering and ‡Department of Materials Science
and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Scott T. Milner
- Department of Chemical Engineering and ‡Department of Materials Science
and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
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49
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Hong YL, Koga T, Miyoshi T. Chain Trajectory and Crystallization Mechanism of a Semicrystalline Polymer in Melt- and Solution-Grown Crystals As Studied Using 13C–13C Double-Quantum NMR. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00079] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- You-lee Hong
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325-3909, United States
| | - Tadanori Koga
- Department
of Materials Science and Engineering, Stony Brook University, Stony Brook, New York 11794-2275, United States
| | - Toshikazu Miyoshi
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325-3909, United States
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50
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The dependence time of melting behavior on rheological aspects of disentangled polymer melt: a route to the heterogeneous melt. JOURNAL OF POLYMER RESEARCH 2015. [DOI: 10.1007/s10965-015-0681-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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