1
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Qiu M, Cao P, Cao L, Tan Z, Hou C, Wang L, Wang J. Parameter Determination of the 2S2P1D Model and Havriliak-Negami Model Based on the Genetic Algorithm and Levenberg-Marquardt Optimization Algorithm. Polymers (Basel) 2023; 15:2540. [PMID: 37299338 PMCID: PMC10255835 DOI: 10.3390/polym15112540] [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: 03/22/2023] [Revised: 05/23/2023] [Accepted: 05/25/2023] [Indexed: 06/12/2023] Open
Abstract
This study utilizes the genetic algorithm (GA) and Levenberg-Marquardt (L-M) algorithm to optimize the parameter acquisition process for two commonly used viscoelastic models: 2S2P1D and Havriliak-Negami (H-N). The effects of the various combinations of the optimization algorithms on the accuracy of the parameter acquisition in these two constitutive equations are investigated. Furthermore, the applicability of the GA among different viscoelastic constitutive models is analyzed and summarized. The results indicate that the GA can ensure a correlation coefficient of 0.99 between the fitting result and the experimental data of the 2S2P1D model parameters, and it is further proved that the fitting accuracy can be achieved through the secondary optimization via the L-M algorithm. Since the H-N model involves fractional power functions, high-precision fitting by directly fitting the parameters to experimental data is challenging. This study proposes an improved semi-analytical method that first fits the Cole-Cole curve of the H-N model, followed by optimizing the parameters of the H-N model using the GA. The correlation coefficient of the fitting result can be improved to over 0.98. This study also reveals a close relationship between the optimization of the H-N model and the discreteness and overlap of experimental data, which may be attributed to the inclusion of fractional power functions in the H-N model.
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Affiliation(s)
- Mingzhu Qiu
- Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing 100084, China; (M.Q.)
| | - Peng Cao
- Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing 100084, China; (M.Q.)
| | - Liang Cao
- Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing 100084, China; (M.Q.)
| | - Zhifei Tan
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong SAR, China;
| | - Chuantao Hou
- Science and Technology on Reliability and Environmental Engineering Laboratory, Beijing Institute of Structure and Environment Engineering, Beijing 100076, China; (C.H.); (L.W.)
| | - Long Wang
- Science and Technology on Reliability and Environmental Engineering Laboratory, Beijing Institute of Structure and Environment Engineering, Beijing 100076, China; (C.H.); (L.W.)
| | - Jianru Wang
- The 41st Institute of the Fourth Research Academy of CASC, Xi’an 100124, China
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2
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Chen J, Chen Y, Zhang J, Wang P, Wang D, Ye W, Chen A, Lei C, Yin Z. Design of thermal conductive polymer composites with precisely controlling
graphene nanoplatelets
at the interface of
polypropylene
and
high melt strength polypropylene
via elongation flow. POLYM ADVAN TECHNOL 2023. [DOI: 10.1002/pat.6034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Affiliation(s)
- Jiahuan Chen
- School of Materials and Energy Guangdong University of Technology Guangzhou 510006 China
| | - Yirong Chen
- School of Materials and Energy Guangdong University of Technology Guangzhou 510006 China
| | - Jingjing Zhang
- School of Materials and Energy Guangdong University of Technology Guangzhou 510006 China
| | - Pengkui Wang
- School of Materials and Energy Guangdong University of Technology Guangzhou 510006 China
| | - Dehe Wang
- School of Materials and Energy Guangdong University of Technology Guangzhou 510006 China
| | - Weihong Ye
- School of Materials and Energy Guangdong University of Technology Guangzhou 510006 China
| | - Anfu Chen
- School of Materials and Energy Guangdong University of Technology Guangzhou 510006 China
| | - Caihong Lei
- School of Materials and Energy Guangdong University of Technology Guangzhou 510006 China
| | - Zhansong Yin
- School of Industrial Automation Beijing Institute of Technology Zhuhai 519088 China
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3
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Huang DE, Kotula AP, Snyder CR, Migler KB. Crystallization Kinetics in an Immiscible Polyolefin Blend. Macromolecules 2022; 55. [PMID: 36969109 PMCID: PMC10037551 DOI: 10.1021/acs.macromol.2c01691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Motivated by the problem of brittle mechanical behavior in recycled blends of high density polyethylene (HDPE) and isotactic polypropylene (iPP), we employ optical microscopy, rheo-Raman, and differential scanning calorimetry (DSC) to measure the composition dependence of their crystallization kinetics. Raman spectra are analyzed via multivariate curve resolution with alternating least-squares (MCR-ALS) to provide component crystallization values. We find that iPP crystallization behavior varies strongly with blend composition. Optical microscopy shows that three crystallization kinetic regimes correspond to three underlying two-phase morphologies: HDPE droplets in iPP, the inverse, and cocontinuous structures. In the HDPE droplet regime, iPP crystallization temperature decreases sharply with increasing HDPE composition. For cocontinuous morphologies, iPP crystallization is delayed, but the onset temperature changes little with the exact blend composition. In the iPP droplet regime, the two components crystallize nearly concurrently. Rheological measurements are consistent with these observations. DSC indicates that the enthalpy of crystallization of the blends is less than the weighted values of the individual components, providing a possible clue for the decreased iPP crystallization temperatures.
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Affiliation(s)
- Derek E. Huang
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Anthony P. Kotula
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Chad R. Snyder
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Kalman B. Migler
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
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4
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Upcycling of Poly(Lactic Acid) by Reactive Extrusion with Recycled Polycarbonate: Morphological and Mechanical Properties of Blends. Polymers (Basel) 2022; 14:polym14235058. [PMID: 36501453 PMCID: PMC9740999 DOI: 10.3390/polym14235058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/16/2022] [Accepted: 11/17/2022] [Indexed: 11/23/2022] Open
Abstract
Poly(lactic acid) (PLA) is one of the most promising renewable polymers to be employed to foster ecological and renewable materials in many fields of application. To develop high-performance products, however, the thermal resistance and the impact properties should be improved. At the same time, it is also necessary to consider the end of life through the exploration of property assessment, following reprocessing. In this context the aim of the paper is to develop PLA/PC blends, obtained from recycled materials, in particular scraps from secondary processing, to close the recycling loop. Indeed, the blending of PLA with polycarbonate (PC) was demonstrated to be a successful strategy to improve thermomechanical properties that happens after several work cycles. The correlation between the compositions and properties was then investigated by considering the morphology of the blends; in addition, the reactive extrusions resulting in the formation of a PLA-PC co-polymer were investigated. The materials obtained are then examined by means of a dynamic-mechanical analysis (DMTA) to study the relaxations and transitions.
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5
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Chen J, Zhang J, Deng J, Qiu S, Zheng J, Chen Y, Zhang W, Huang S, Chen A, Lei C. Control of graphene nanoplatelets at the interface of the co-continuous polypropylene/polyamides 6 blend under the elongational flow. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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6
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Yin J, Ouyang QF, Sun ZB, Wu FY, Liu Q, Zhang XX, Xu L, Lin H, Zhong GJ, Li ZM. Quantitative Investigation on Structural Evolution of Co-continuous Phase under Shear Flow. CHINESE JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1007/s10118-022-2690-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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7
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Hao B, Li B, Yu W. Nonequilibrium Structure Diagram of Pendular Suspensions under Large-Amplitude Oscillatory Shear. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:6208-6218. [PMID: 33975432 DOI: 10.1021/acs.langmuir.1c00367] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
For pendular suspensions with particles in contact with immiscible secondary liquid bridges, the shear field significantly influences particle aggregates and networks. In this work, we study the structure of the pendular network and how the structure changes under large-amplitude-oscillatory shear. Using rheology and optical microscopy, we found unique network destruction followed by reconstruction with increasing strain. Two processes show different shear-field dependencies, strain-rate dependency for destruction and strain dependency for reconstruction. A nonequilibrium state diagram is constructed to show the phase behavior, where the critical particle concentration of sol-gel transition is dependent on the shear history and may depend on shear strain nonmonotonically. Two different mechanisms, shear-induced network breakdown at low strain and shear-induced agglomeration at high strain, are suggested to describe the nonmonotonic critical concentration under the upward strain sweep quantitatively.
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Affiliation(s)
- Bonan Hao
- Advanced Rheology Institute, Department of Polymer Science and Engineering, State Key Laboratory for Metal Matrix Composite Materials, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Benke Li
- Advanced Rheology Institute, Department of Polymer Science and Engineering, State Key Laboratory for Metal Matrix Composite Materials, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Wei Yu
- Advanced Rheology Institute, Department of Polymer Science and Engineering, State Key Laboratory for Metal Matrix Composite Materials, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
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8
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Improving Impact Toughness of Polylactide/Ethylene-co-vinyl-acetate Blends via Adding Fumed Silica Nanoparticles: Effects of Specific Surface Area-dependent Interfacial Selective Distribution of Silica. CHINESE JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1007/s10118-021-2565-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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9
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Co-continuous phase prediction in poly(lactic acid) /poly(caprolactone) blends from melt viscosity measurements. POLYM-PLAST TECH MAT 2021. [DOI: 10.1080/25740881.2021.1904983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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10
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Chen J, Rong C, Lin T, Chen Y, Wu J, You J, Wang H, Li Y. Stable Co-Continuous PLA/PBAT Blends Compatibilized by Interfacial Stereocomplex Crystallites: Toward Full Biodegradable Polymer Blends with Simultaneously Enhanced Mechanical Properties and Crystallization Rates. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02861] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Jiali Chen
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, No. 2318 Yuhangtang Rd, Hangzhou, Zhejiang 311121, P. R. China
| | - Chenyan Rong
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, No. 2318 Yuhangtang Rd, Hangzhou, Zhejiang 311121, P. R. China
| | - Taotao Lin
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, No. 2318 Yuhangtang Rd, Hangzhou, Zhejiang 311121, P. R. China
| | - Yihang Chen
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, No. 2318 Yuhangtang Rd, Hangzhou, Zhejiang 311121, P. R. China
| | - Jiali Wu
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, No. 2318 Yuhangtang Rd, Hangzhou, Zhejiang 311121, P. R. China
| | - Jichun You
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, No. 2318 Yuhangtang Rd, Hangzhou, Zhejiang 311121, P. R. China
| | - Hengti Wang
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, No. 2318 Yuhangtang Rd, Hangzhou, Zhejiang 311121, P. R. China
| | - Yongjin Li
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, No. 2318 Yuhangtang Rd, Hangzhou, Zhejiang 311121, P. R. China
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11
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Wang H, Chen J, Li Y. Arrested Elongated Interface with Small Curvature by the Simultaneous Reactive Compatibilization and Stereocomplexation. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01804] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Hengti Wang
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, No. 2318 Yuhangtang Road, Hangzhou 311121, Zhejiang, P. R. China
| | - Jiali Chen
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, No. 2318 Yuhangtang Road, Hangzhou 311121, Zhejiang, P. R. China
| | - Yongjin Li
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, No. 2318 Yuhangtang Road, Hangzhou 311121, Zhejiang, P. R. China
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12
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Properties of Styrene-Maleic Anhydride Copolymer Compatibilized Polyamide 66/Poly (Phenylene Ether) Blends: Effect of Blend Ratio and Compatibilizer Content. MATERIALS 2020; 13:ma13153400. [PMID: 32752006 PMCID: PMC7435725 DOI: 10.3390/ma13153400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 07/23/2020] [Accepted: 07/29/2020] [Indexed: 11/16/2022]
Abstract
Two different blend ratios of polyamide 66 (PA66) and poly (2,6-dimethyl-1,4-phenylene ether) (PPE) (60/40 and 40/60 w/w) were produced via melt mixing. A styrene-maleic anhydride copolymer (SMA) was utilized at various contents from 2.5-15 wt% to compatibilize the immiscible blend system. The influence of SMA content and blend ratio was investigated based on (thermo-) mechanical and morphological properties of the PA66/PPE blends. Correlations between the interaction of SMA with the blend partners were established. For 60/40 blends, a droplet-sea morphology was visualized by transmission electron microscopy, wherein no major changes were seen upon SMA addition. In the case of 40/60 blends, strong coalescence was found in the binary blend. Up to 5 wt% SMA, the coalescence was inhibited by the interfacial activity of SMA, whereas 10 wt% SMA initiated a disperse-to-co-continuous transition, which was completed at 15 wt% SMA. An enhancement of tensile properties was achieved for all blends possessing SMA, where the maximum concentration of 15 wt% resulted in the highest elongation at break and tensile strength values. The relative improvement of the tensile properties was higher with the PPE-rich blend (40/60) which was attributed to a partial emulsification of the PPE phases forming a bimodal PPE domain size distribution with nano-droplets in the range of 60-160 nm.
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13
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Chen Y, Liao L, Liu H, Wang Y, Zhang L, Chen L, Yu L. Effect of annealing on morphologies and performances of hydroxypropyl methylcellulose/hydroxypropyl starch blends. J Appl Polym Sci 2020. [DOI: 10.1002/app.49535] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ying Chen
- Centre for Polymers from Renewable Resources SFSE, South China University of Technology Guangzhou China
| | - Lisha Liao
- Centre for Polymers from Renewable Resources SFSE, South China University of Technology Guangzhou China
| | - Hongsheng Liu
- Centre for Polymers from Renewable Resources SFSE, South China University of Technology Guangzhou China
- School of Food Science and Engineering Sino‐Singapore International Joint Research Institute Guangzhou China
| | - Yanfei Wang
- College of Food Science and Engineering Qingdao Agricultural University Qingdao Shandong China
| | - Liang Zhang
- College of Food Science and Engineering Yangzhou University Yangzhou China
| | - Ling Chen
- Centre for Polymers from Renewable Resources SFSE, South China University of Technology Guangzhou China
| | - Long Yu
- Centre for Polymers from Renewable Resources SFSE, South China University of Technology Guangzhou China
- School of Food Science and Engineering Sino‐Singapore International Joint Research Institute Guangzhou China
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14
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Sethy S, Samantara L, Satapathy BK. Phase‐selective micro‐structural effects on rheological‐networks, segmental relaxation, and electrical conductivity behavior of melt‐mixed polyamide‐12/polypropylene‐multi walled carbon nanotubes ternary nanocomposites. POLYM ENG SCI 2020. [DOI: 10.1002/pen.25381] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sucharita Sethy
- Department of Materials Science and EngineeringIndian Institute of Technology Delhi Hauz Khas New Delhi India
| | | | - Bhabani K. Satapathy
- Department of Materials Science and EngineeringIndian Institute of Technology Delhi Hauz Khas New Delhi India
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15
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Charfeddine I, Majesté J, Carrot C, Lhost O. A model for the prediction of the morphology of immiscible blends of polymers. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122334] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Yang X, Song J, Wang H, Lin Q, Jin X, Yang X, Li Y. Reactive Comb Polymer Compatibilized Immiscible PVDF/PLLA Blends: Effects of the Main Chain Structure of Compatibilizer. Polymers (Basel) 2020; 12:E526. [PMID: 32121651 PMCID: PMC7182944 DOI: 10.3390/polym12030526] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 02/10/2020] [Accepted: 02/13/2020] [Indexed: 11/29/2022] Open
Abstract
The compatibilizer with double comb structure has a superior compatibilizing effect for immiscible polymer blends due to the symmetrical structure on both sides of main chains. Extensive study related to the architectural effects of compatibilizer on the compatibilization has mainly focused on the side chains. We investigated the influence of the compatibilizer-main-chain structure on the compatibilizing effect for immiscible poly(vinylidene fluoride)/poly(L-lactic acid) (PVDF/PLLA) blends. Two reactive-comb compatibilizers with polystyrene (PS) and polymethylmethacrylate (PMMA) as main chains and PMMA as the side chains have been synthesized. PS is immiscible with both PLLA and PVDF, while PMMA is miscible with PVDF. It was found that both compatibilizers can improve the compatibility between the PLLA and PVDF, with different compatibilization effects. In the PVDF/PLLA (50/50) blends, 1 wt.% poly(styrene-co-glycidyl methacrylate)-graft-poly(methyl methacrylate) (RC-SG) tuned the morphology from the droplet-in-matrix structure to the co-continuous structure, while the blends with poly(methyl methacrylate-co-glycidyl methacrylate)-graft-poly(methyl methacrylate) (RC-MMG) kept the sea-island structure with even 3 wt.% loading. Moreover, RC-SG induces a wider co-continuous interval range than RC-MMG. The co-continuous structure obtained by RC-SG was also more stable than that by RC-MMG. It was further found that RC-SG-compatibilized PVDF/PLLA blends exhibit higher mechanical properties than the RC-MMG-compatibilized blends.
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Affiliation(s)
- Xin Yang
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, No. 2318 Yuhangtang Rd., Hangzhou 311121, China; (X.Y.); (H.W.); (Q.L.)
| | - Jinxing Song
- Transfar Zhilian Co. Ltd., Hangzhou 311215, China; (J.S.); (X.J.); (X.Y.)
| | - Hengti Wang
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, No. 2318 Yuhangtang Rd., Hangzhou 311121, China; (X.Y.); (H.W.); (Q.L.)
| | - Qingqing Lin
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, No. 2318 Yuhangtang Rd., Hangzhou 311121, China; (X.Y.); (H.W.); (Q.L.)
| | - Xianhua Jin
- Transfar Zhilian Co. Ltd., Hangzhou 311215, China; (J.S.); (X.J.); (X.Y.)
| | - Xin Yang
- Transfar Zhilian Co. Ltd., Hangzhou 311215, China; (J.S.); (X.J.); (X.Y.)
| | - Yongjin Li
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, No. 2318 Yuhangtang Rd., Hangzhou 311121, China; (X.Y.); (H.W.); (Q.L.)
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17
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Li F, Zhang Y, Zhao X, Chen Q, Li Y, You J. Graft ratio: Quantitative measurement and direct evidence for its blending sequence dependence during reactive compatibilization in PVDF/PLLA. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.121970] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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18
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Lin S, You W, Yu W, Wang X. Key factors in mechanical reinforcement by double percolation network: Particle migration and shear stability of filler network. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.121820] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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Lyu Y, Pang J, Gao Z, Zhang Q, Shi X. Characterization of the compatibility of PVC/PLA blends by Aid of Rheological Responses. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.05.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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20
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Hao B, Yu W. A New Solid-like State for Liquid/Liquid/Particle Mixtures with Bicontinuous Morphology of Concentrated Emulsion and Concentrated Suspension. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:9529-9537. [PMID: 31251879 DOI: 10.1021/acs.langmuir.9b01088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Research in exploring the microstructures of the ternary liquid/liquid/particle mixture is still a challenging task due to the complex interface properties and compositions of each phase. In this work, we report a new kind of solid-like state for ternary mixtures after the addition of a surfactant, which has the bicontinuous morphology of two phases, that is, the concentrated emulsion and the concentrated noncolloidal suspension. The bicontinuous morphology was justified by optical microscopy and the unique two-step yielding behavior under large oscillatory shear flow, which has the yielding character of a noncolloidal suspension at smaller strain and that of a concentrated emulsion at larger strain. A phase diagram is constructed from the rheological measurements and morphological observations. The boundaries of the new solid-like state can be well predicted from three basic requirements on the glass forming or jamming conditions in the aqueous noncolloidal suspension phase, the aqueous emulsion phase, and the whole ternary mixture.
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Affiliation(s)
- Bonan Hao
- Advanced Rheology Institute, Department of Polymer Science and Engineering, State Key Laboratory for Metal Matrix Composite Materials, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging , Shanghai Jiao Tong University , Shanghai 200240 , P. R. China
| | - Wei Yu
- Advanced Rheology Institute, Department of Polymer Science and Engineering, State Key Laboratory for Metal Matrix Composite Materials, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging , Shanghai Jiao Tong University , Shanghai 200240 , P. R. China
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You W, Yu W. Onset Reduction and Stabilization of Cocontinuous Morphology in Immiscible Polymer Blends by Snowmanlike Janus Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:11092-11100. [PMID: 30149721 DOI: 10.1021/acs.langmuir.8b02503] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Interfacial jamming of monolayer nanoparticles is often required to kinetically arrest the cocontinuous morphology, which is not in favor of achieving high efficiency at low particle contents. In this paper, we find that the shape asymmetry of the snowmanlike Janus particles (JPs) has significant influence on the cocontinuous morphology of polymer blends under the melt-mixing process. The addition of 0.9 vol % snowmanlike JPs can almost have the onset concentration of cocontinuity in immiscible blends, which is much lower than the apparent interfacial jamming concentration. In addition, JPs show superior ability to stabilize the continuous morphology during annealing at high temperatures. The interfacial activity of asymmetric JPs is due to the decrease in the radius of the jamming curvature in the interfacial region as the shape asymmetry of the snowmanlike JPs increases. This result implies a general strategy to prepare Janus nanoparticles for a highly effective interfacial modification agent at low contents, which can induce the dispersed-phase continuity and suppress the coarsening of cocontinuous morphology simultaneously.
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Affiliation(s)
- Wei You
- Advanced Rheology Institute, Department of Polymer Science and Engineering, State Key Laboratory for Metal Matrix Composite Materials, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing , Shanghai Jiao Tong University , Shanghai 200240 , P. R. China
| | - Wei Yu
- Advanced Rheology Institute, Department of Polymer Science and Engineering, State Key Laboratory for Metal Matrix Composite Materials, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing , Shanghai Jiao Tong University , Shanghai 200240 , P. R. China
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