Article
Polymer Science
Tobias Bubmann, Andreas Seidel, Holger Ruckdaeschel, Volker Altstaedt
Summary: The reactive compounding of phenolic OH-functionalized polycarbonate (PC) with epoxy-functionalized polymethylmethacrylate (PMMA) was investigated. It was found that the PC/PMMA copolymer formed during the melt reaction and its presence affected the optical and mechanical properties of the blends. Transparent PC/PMMA blends with two-phase morphologies were obtained, combining high light transmission and excellent mechanical performance.
Article
Polymer Science
Yanhui Wang, Shaofeng Zhang, Hanqing Jiang, Yichao Lin, Haiping Xing, Tao Tang
Summary: The study found that the composition and chain architecture of the compatibilizers have a significant impact on the compatibilization efficiency of LLDPE/PS blends. The different chain structures of PS-cb-PE copolymers led to varying levels of compatibility, further affecting the performance of the blends.
Article
Engineering, Chemical
Antimo Graziano, Otavio Augusto Titton Dias, Bruno Sena Maia, Jinlei Li
Summary: This study demonstrates the effectiveness of using MAPE to compatibilize PE-rich blends with PP as the minor phase, resulting in improved mechanical properties and reduced viscosity mismatch and interfacial tension.
POLYMER ENGINEERING AND SCIENCE
(2021)
Article
Polymer Science
D. D. Wu, Y. Guo, A. P. Huang, R. W. Xu, P. Liu
Summary: The study demonstrated that different types of Joncryl epoxides have varying effects on the properties of PBAT/PLA blends, with ADR4368 showing the best modification effect. Enhancements in mechanical properties and compatibility were observed with the presence of ADR4368.
Article
Materials Science, Characterization & Testing
Min Wu, Han-Xiong Huang, Li-Min Yu
Summary: In this study, immiscible poly(methyl methacrylate)/polystyrene (PMMA/PS) blends with different composition ratios were prepared using water-assisted mixing extrusion (WAME), and it was found that injecting high-pressure water can significantly refine the phase domains and improve the properties of the blends.
Article
Chemistry, Physical
Haibin Cai, Botuo Zheng, Deqin Zhu, Yaqiong Wu, Ruth Cardinaels, Paula Moldenaers, Zhuofan Shen, Yu Sheng, Hu Zhu, Kai Yu, Huagui Zhang
Summary: By grafting polystyrene and poly(hydroxyethyl methacrylate) onto graphene oxide nanosheets, Janus nanosheets are formed, allowing tunable morphology in spin-coated blend films. Various film morphologies, including flat surface, cavity-network structures, droplet-matrix structures, etc. can be obtained by adjusting blend composition and Janus nanosheet loading.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Szymon Kozlowski, Magdalena Lipinska, Miroslav Slouf, Miroslav Mrlik, Christopher M. Plummer, Marketa Ilcikova, Josef Osicka, Joanna Pietrasik
Summary: The molecular weight of a polymer is a crucial factor in determining material properties. In this study, a novel polymer blend was designed by correlating the molecular weight of poly(methyl methacrylate) (PMMA) chains tethered on graphene oxide (GO) particles with the molecular weight of the PMMA matrix. Rheological studies and TEM analyses were conducted to investigate the effects of molecular weight on blend compatibility, viscoelasticity, and morphology.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Dusan Mrdenovic, Daniel Abbott, Victor Mougel, Weitao Su, Naresh Kumar, Renato Zenobi
Summary: This article introduces a sensitive nanoanalytical method, combining TERS, AFM, confocal Raman spectroscopy, and XPS, to determine the phase separation in polymer blend films. The study reveals the vertical phase separation at the top ca. 20 nm of the blend surface and lateral phase separation in the bulk.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Polymer Science
Tetsuo Takayama, Rin Shibazaki
Summary: The molecular orientation formed during melt-forming processes is strongly influenced by the flow direction. Quantifying this anisotropy, especially in polymer blends, is crucial for evaluating the mechanical properties of thermoplastic molded products. This study used short-beam shear testing to assess mechanical anisotropy as a stress concentration factor and established a correlation between the evaluation results and phase structure. Additionally, the study identified the yielding conditions related to uniaxial tensile loading by comparing the results with those of three-point bending tests.
Article
Crystallography
Xingyuan Diao, Xiaonan Chen, Shihao Deng, Hongwei Bai
Summary: In this study, trace amounts of epoxy-functionalized small-molecule modifiers were introduced into enantiomeric blends during reactive melt-blending to enhance the formation of stereocomplex-type polylactide (SC-PLA). The results showed that the in situ generation of multi-arm stereo-block PLA copolymers significantly improved SC formation, even with only 0.5 wt% modifiers. The unique copolymers acted as compatibilizers, suppressing the separation of the alternately arranged PLLA/PDLA chain segments in the molten state. Furthermore, the generation of these copolymers did not significantly increase the melt viscosity of the blends, suggesting new opportunities for high-throughput processing of SC-PLA materials.
Article
Polymer Science
Karen Van Kets, Justien Jacques, Laurens Delva, Kim Ragaert
Summary: The study evaluates the thermal and morphological stabilization of three compatibilizers during the mechanical recycling of polymer blends. The results show that although the degradation of the blends is low during multiple processing, the core stability depends on the initial stability of all components. The thermal stability of the matrix-based grafted compatibilized blend is the most favorable across the five extrusions.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Yaping Ma, Aihua He, Chenguang Liu
Summary: Blending isotactic polybutene-1 (PB) with isotactic polypropylene (PP) is an effective strategy to improve the mechanical properties and promote polymorphous transformation of PB. In this study, it was found that adding 2.5 wt% of PB-b-PP copolymer as a compatibilizer in PB/PP/PB-b-PP blends can achieve the most stable phase morphology and enhance the crystallization rate and crystallinity of PB and PP. Copolymer A is more efficient in accelerating the crystallization rate of PP compared to copolymer B, leading to significantly improved mechanical properties of the blends.
Article
Materials Science, Multidisciplinary
Pengwu Xu, Shuai Tan, Deyu Niu, Weijun Yang, Piming Ma
Summary: This study used biodegradable and flexible polycaprolactone (PCL) and multifunctional epoxy polymers (MEPs) to improve the toughness of polyglycolic acid (PGA). By adding MEP to PGA and PCL, the compatibility between PGA and PCL was greatly improved, resulting in significantly increased toughness and tensile strength of PGA/PCL blends.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Chemistry, Physical
Xiaokang Sun, Kai Liu, Nie Zhao, Fenggang Bian, Chunming Yang, Yuying Huang
Summary: In this study, the morphological evolution of block copolymer films during the thermal-induced self-assembly process was investigated. It was found that the formation of ordered structure in the films was mainly determined by phase separation of block molecules followed by growth of grains in the nanodomain. Additionally, better-order nanodomains were obtained with thermal annealing at a faster heating rate.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Polymer Science
Pengyu Chen, Frank S. Bates, Kevin D. Dorfman
Summary: In this study, the feasibility of adding ABC triblock copolymers into a polymer system was investigated using self-consistent field theory. The results showed that the addition of a small amount of ISO could stabilize the GA morphology, but the phase window was relatively narrow. Designing the system to have comparable domain sizes enhanced the stability of GA against competing lamellae.
Article
Polymer Science
Adriana Martinelli Catelli de Souza, Caren Barbosa Caldeira
JOURNAL OF APPLIED POLYMER SCIENCE
(2015)
Article
Polymer Science
Adriana Martinelli Catelli de Souza, Mayara Gallego Cucchiara, Adriana Vitorio Ereio
JOURNAL OF APPLIED POLYMER SCIENCE
(2016)
Article
Materials Science, Characterization & Testing
Ana Lucia Perrone de L. Freitas, Luiz Roberto Tonini Filho, Patricia Schmid Calvao, Adriana M. Catelh de Souza
Article
Polymer Science
A. M. C. Souza, D. S. Lepretre, N. R. Demarquette, M. F. Lacrampe, P. Krawczak
JOURNAL OF APPLIED POLYMER SCIENCE
(2010)
Article
Polymer Science
Adriana Martinelli Catelli de Souza, Patricia Schmid Calvao, Nicole Raymonde Demarquette
JOURNAL OF APPLIED POLYMER SCIENCE
(2013)
Article
Materials Science, Characterization & Testing
H. V. Torrecillas, L. C. Costa, A. M. C. Souza
Article
Engineering, Environmental
Laerte J. de Almeida, Adriana M. Catelli de Souza
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2020)
Article
Engineering, Chemical
Juliana Satie Watai, Patricia Schmid Calvao, Talita Rocha Rigolin, Silvia Helena do Prado Bettini, Adriana Martinelli Catelli Souza
POLYMER ENGINEERING AND SCIENCE
(2020)
Article
Polymer Science
Gustavo D. Domingo, Adriana M. C. Souza
Summary: The study investigated the effects of repeated injection molding cycles on the structure and properties of PA6/PA66/talc composite, revealing that an increase in processing cycles led to a reduction in certain mechanical properties, such as tensile and flexural strength and modulus. The weakening talc-matrix interaction and debonding became more evident with increasing processing cycles, as shown by micrographs of the fatigue fractured surfaces.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Materials Science, Composites
Luiz Henrique Cavalcante Damacena, Eder Henrique Coelho Ferreira, Helio Ribeiro, Guilhermino Jose Macedo Fechine, Adriana Martinelli Catelli Souza
Summary: This study investigates the effect of graphene oxide (GO) coating on carbon fiber (CF) surface on the properties and morphology of CF-reinforced polyamide 6 (PA6) composites. The addition of GO coated CFs led to a significant change in the crystal structure of PA6, resulting in improved mechanical properties. The GO coating enhanced tensile and flexural strength as well as stiffness, but it decreased impact strength and fatigue life compared to unmodified PA6/CF composites. Fracture micrographs confirmed the enhanced CF-PA6 interaction and the effectiveness of GO as a coupling agent.
POLYMER COMPOSITES
(2023)
Proceedings Paper
Materials Science, Composites
A. M. C. Souza, M. C. Cucchiara
9TH INTERNATIONAL CONFERENCE ON TIMES OF POLYMERS AND COMPOSITES: FROM AEROSPACE TO NANOTECHNOLOGY
(2018)
Proceedings Paper
Materials Science, Composites
H. V. Torrecilas, L. C. Costa, A. M. C. Souza
9TH INTERNATIONAL CONFERENCE ON TIMES OF POLYMERS AND COMPOSITES: FROM AEROSPACE TO NANOTECHNOLOGY
(2018)
Proceedings Paper
Physics, Applied
Roberto A. Nascimento, Adriana M. Catelli de Souza
PROCEEDINGS OF THE REGIONAL CONFERENCE GRAZ 2015 - POLYMER PROCESSING SOCIETY PPS: CONFERENCE PAPERS
(2016)
Proceedings Paper
Physics, Applied
Gustavo D. Domingo, Adriana M. Catelli de Souza
PROCEEDINGS OF THE REGIONAL CONFERENCE GRAZ 2015 - POLYMER PROCESSING SOCIETY PPS: CONFERENCE PAPERS
(2016)
Article
Mechanics
Chen Liu, Jianzhong Lin, Zhenyu Ouyang
Summary: This study simulated the locomotion state and motion type of elliptical squirmers in a channel flow of power-law fluids. The influence of different parameters on the squirmers was explored, and it was found that coupled structures are prone to break and viscosity significantly affects the flow velocity and motion type of squirmers.
Article
Mechanics
E. E. Herrera-Valencia, M. L. Sanchez-Villavicencio, C. Soriano-Correa, O. Bautista, L. A. Ramirez-Torres, V. J. Hernandez-Abad, F. Calderas
Summary: This study investigated the electroosmotic flow of a viscoelastic fluid in a capillary system. The rheology of the fluid was characterized by a novel generalized exponential model equation, and the effect of charge density on the double-layer field and electrical forces was analyzed. Mathematical models were used to describe the rheological properties and flow performance of the fluid, and experimental data were used to make predictions. The study also examined the influence of applied forces on the structure of the fluid.
Article
Mechanics
Stefano Amadori, Giuseppe Catania
Summary: This article presents a multi-step, iterative technique for locally non-parametric identification of the standard linear solid (SLS) material model using fractional order time differential operators. Test input data consists of a set of identified material complex modulus values estimated at different frequency values obtained from input-output experimental measurements and quasi-static relaxation measurements on the same specimen. The proposed technique is based on an algebraic procedure to solve an overdetermined system of linear equations in order to obtain optimal values for the unknown parameters of the model. The procedure is non-parametric, as the order of the SLS model is initially unknown.
