Article
Polymer Science
Chun-Jing Qv, Wei Li, Rui-Jun Zhao, Zhe Ma
Summary: The macromolecular architecture plays a crucial role in determining ordering structures and can induce the memory effect. By controlling branch length and density, the melting behavior and degree of crystallinity of copolymers can be adjusted.
CHINESE JOURNAL OF POLYMER SCIENCE
(2022)
Article
Chemistry, Physical
Tatiana Otroshchenko, Qiyang Zhang, Evgenii Kondratenko
Summary: The study explores an efficient method for propene generation from ethylene and 2-butene using modified SiO2 support, with the addition of phosphorous facilitating the creation of a special type of hydroxyls to aid in 2-butene adsorption on MoOx and facilitate the conversion to Mo = CH-CH3.
Article
Polymer Science
Tiefeng Zhang, Chunfeng Wang, Yongliang Wang, Lijun Qian, Zhidong Han
Summary: In ethylene-vinyl acetate copolymer composites, the synergistic effect between polycarbosilane and magnesium hydroxide significantly improves flame-retardant properties while forming a cohesive and compact char layer.
Article
Polymer Science
Hassam Mazhar, Farrukh Shehzad, Sung-Gil Hong, Mamdouh A. Al-harthi
Summary: This study investigated the in-situ incorporation of NiFe-(Anion) layered double hydroxides (LDH) in the ethylene-propylene (EP) copolymerization, resulting in EP/LDH nanocomposites with improved thermal stability. Different types of intercalated anions in the LDH were found to have a significant effect on the thermal stability and degradation mechanism of the polymer nanocomposites.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Beatriz Pesco, Rebeca R. Rodrigues, Leonardo J. A. de Siqueira, Laura O. Peres
Summary: Block copolymers can form composites with improved physical properties by combining with ionic liquids. This study focused on the interactions and properties of a composite formed by poly(p-phenylene vinylene-b-ethylene glycol) block copolymer and the ionic liquid butyltrimethylammonium bis(trifluoromethanesulfonyl) imide. The results showed a physical interaction between the ionic liquid and the polyethylene glycol fraction of the block copolymer, altering the degradation events and crystallinity. The block copolymer maintained its luminescent characteristics even with the addition of the ionic liquid, leading to an increase in emission intensity.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Weisheng Yang, Juan Wang, Liang Jiao, Yang Song, Chang Li, Chaoquan Hu
Summary: This study proposes a feasible and green strategy for the low-cost and environmentally friendly hydrolysis of waste PET, using concentrated p-toluenesulfonic acid (PTSA) as an acid catalyst. The PTSA catalyst can effectively degrade PET into terephthalic acid (TPA) under relatively mild conditions and is recyclable.
Article
Polymer Science
Erica Fernanda da Silva Tirelli, Neil de Medeiros
Summary: This study investigated the effects of degradation on the properties of fluorinated ethylene propylene copolymers (FEP). The results showed that the physical and structural properties of FEP were affected, especially the crystallinity and morphology. This provides important support for industries in evaluating the degradability of the material after processing and under specific applications.
IRANIAN POLYMER JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Liuhao Jiang, Shihang Wang, Liuqing Yang, Shengtao Li, Yang Feng, Yunfei Bai
Summary: The content of short chain branch (SCB) in LDPE is many times that of long chain branch (LCB), reducing SCB content can decrease grain size and improve breakdown strength. Trap distribution characteristics can be measured using the thermally stimulated depolarization current (TSDC) method.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2021)
Article
Polymer Science
Joaquin Hernandez-Fernandez, Rodrigo Ortega-Toro, John R. Castro-Suarez
Summary: The copolymer synthesis process can be influenced by failures or contaminating compounds, which act as an inhibiting agent of the ZN catalyst, affecting its productivity and the final properties of the ethylene-propylene copolymer. This study analyzed the effect of formaldehyde, propionaldehyde, and butyraldehyde on the ZN catalyst, showing that higher concentrations of these aldehydes have a more significant impact. Additionally, these impurities affect the fluidity index, thermogravimetric analysis, bending, tension, and impact of the final product, resulting in lower quality and reduced resistance to breakage.
Article
Materials Science, Multidisciplinary
Victor V. Kislyuk, Vladyslav M. Shyvaniuk, Volodymyr V. Trachevskij, Svitlana M. Ostapyuk, Yuriy A. Polushkin, Sergiy O. Kotrechko
Summary: This study proposes a technique based on tensile testing for quantitative characterization of materials with wide strain range and nonlinear stress-strain dependencies. The method was tested on ethylene vinyl acetate (EVA) copolymer and derived activation energies and structural factors for two sequential processes. The research results are consistent with existing concepts and complementary techniques, providing parameters for predicting material behavior.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Yingxuan Chen, Shudi Zhang, Zhenyu Zhai, Shuo Zhang, Jun Ma, Xiao Liang, Quanshun Li
Summary: This study successfully improved the binding affinity and degradation efficiency of cellulases for poly(ethylene terephthalate) (PET) by constructing fusion proteins, providing a practical and prospective strategy for enhancing the environmental treatment capacity of PET.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Materials Science, Characterization & Testing
Camille Blivet, Jean-Francois Larche, Yael Israeli, Pierre-Olivier Bussiere, Jean-Luc Gardette
Summary: The study investigated the thermo-oxidation of cross-linked polyethylene (XLPE) and cross-linked ethylene propylene rubber (XLEPR) used as electrical insulators in cable systems. Characterisation of the aged materials and calculation of activation energies were conducted, showing correlations between oxidation products, crystallinity changes, gel content variations, and mechanical property reductions in both materials. Despite a diffusion-limited oxidation (DLO) effect observed in the 1 mm thick samples, the results were consistent.
Article
Environmental Sciences
Qiang Wu, Jizhong Meng, Hang Yao, Rui Tang, Shoujun Yuan, Yulan Wang, Wei Wang, Haiping Luo, Zhen-Hu Hu
Summary: In this study, a floating TiO2/EVA photocatalyst was successfully synthesized using a simple thermal crosslinking procedure with ethylene-vinyl acetate copolymer (EVA) as the support material. The photocatalyst exhibited uniform TiO2 dispersion and high stability, leading to a significant enhancement in the degradation efficiency of Rhodamine B.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Physical
Oleksandr Stroyuk, Cosima Guettler, Claudia Buerhop-Lutz, Jens Hauch, Ian Marius Peters
Summary: The feasibility of identifying the backsheet composition of field-aged Si photovoltaic modules was demonstrated by analyzing the characteristic patterns of UV-excited fluorescence of ethylene vinyl acetate copolymer encapsulant. The approach involves the use of vibrational spectroscopies to identify the backsheet and the creation of a database of characteristic UV-excited fluorescence patterns. By employing multivariate principal component analysis on the UV-excited fluorescence images of unknown samples, combined with the UV-excited fluorescence pattern database, the backsheet type can be identified solely from UV-excited fluorescence images. The geometric position of specific samples in the principal component plots indicates the overall degradation status of photovoltaic modules.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Polymer Science
Hassam Mazhar, Farrukh Shehzad, Sung-Gil Hong, Mamdouh A. Al-Harthi
Summary: This paper investigates the synthesis and thermal degradation mechanism of LLDPE and its nanocomposite with ZnAL LDH. The results show that the addition of 1-hexene during the in-situ process increases the product yield but decreases the thermal stability of the polymer, while the addition of ZnAL LDH improves the thermal stability.
Article
Engineering, Environmental
Abbas Kebritchi, Mehdi Nekoomansh, Fereidoon Mohammadi, Hossein Ali Khonakdar
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2018)
Article
Polymer Science
Naeimeh Bahri-Laleh, Majid Karimi, Zahra Kalantari, Mehrdad Fallah, Ahad Hanifpour, Mehdi Nekoomanesh-Haghighi
Article
Materials Science, Composites
M. Shayan Asenjan, Ali Reza Sabet, M. Nekoomanesh
JOURNAL OF COMPOSITE MATERIALS
(2019)
Article
Polymer Science
Sanaz Rahmatiyan, Naeimeh Bahri-Laleh, Ahad Hanifpour, Mehdi Nekoomanesh-Haghighi
POLYMER INTERNATIONAL
(2019)
Article
Chemistry, Applied
Sevda Dehghani, Samahe Sadjadi, Naeimeh Bahri-Laleh, Mehdi Nekoomanesh-Haghighi, Albert Poater
APPLIED ORGANOMETALLIC CHEMISTRY
(2019)
Article
Polymer Science
Samaheh Sadjadi, Naeimeh Bahri-Laleh, Mehdi Nekoomanesh-Haghighi, Farshid Ziaee, Sedva Dehghani, Sedigheh Shirbakht, Ameneh Rahbar, Mehdi Salehi Barough, Seyed Amin Mirmohammadi
INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION
(2019)
Article
Polymer Science
Aliasghar Akerdi, Mehdi Haghighi
Article
Chemistry, Applied
Aazam Jalali, Mehdi Nekoomanehs-Haghighi, Sevda Dehghani, Naeimeh Bahri-Laleh
APPLIED ORGANOMETALLIC CHEMISTRY
(2020)
Article
Polymer Science
Mohammad Shayan Asenjan, Seyed Ali Reza Sabet, Mehdi Nekoomanesh
IRANIAN POLYMER JOURNAL
(2020)
Article
Polymer Science
Sevda Dehghani, Ahad Hanifpour, Mehdi Nekoomanesh-Haghighi, Samahe Sadjadi, Seyed Amin Mirmohammadi, Ali Farhadi, Naeimeh Bahri-Laleh
JOURNAL OF APPLIED POLYMER SCIENCE
(2020)
Article
Polymer Science
M. R. Rostami Darounkola, N. Bahri-Laleh, M. Nekoomanesh-Haghighi, S. Rahmatiyan
POLYMER SCIENCE SERIES B
(2019)
Article
Polymer Science
Ahad Hanifpour, Naeimeh Bahri-Laleh, Mehdi Nekoomanesh-Haghighi
POLYMERS FOR ADVANCED TECHNOLOGIES
(2020)
Article
Green & Sustainable Science & Technology
Mehrdad Seifali Abbas-Abadi, Aazam Jalali, Mohammad Reza Rostami, Mehdi Nekoomanesh Haghighi, Ali Farhadi
JOURNAL OF CLEANER PRODUCTION
(2020)
Article
Polymer Science
Davood Nazari, Naeimeh Bahri-Laleh, Ahad Hanifpour, Mehdi Nekoomanesh-Haghighi, Seyed Mehrdad Jalilian, Afshar Alihosseini, Seyed Amin Mirmohammadi
JOURNAL OF POLYMER RESEARCH
(2020)
Article
Chemistry, Physical
Ahad Hanifpour, Naeimeh Bahri-Laleh, Mehdi Nekoomanesh-Haghighi, Albert Poater
MOLECULAR CATALYSIS
(2020)