Polymers for Advanced Technologies

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Preparation of polybenzimidazole‐based mixed matrix membranes containingmodified‐COK‐12 mesoporous silica and evaluation of the mixed‐gas separation performance
Polymers for Advanced Technologies - Tập 33 Số 5 - Trang 1412-1426 - 2022
Griselda Castruita‐de León, Ángel de Jesús Montes‐Luna, Claudia Y. Yeverino‐Miranda, G. Alvarado-Tenorio, H. Iván Meléndez-Ortíz, Odilia Pérez‐Camacho, L.A. Garcı́a-Cerda
AbstractThis work reports the preparation and characterization of mixed matrix membranes (MMMs) based on mesoporous ordered COK‐12 silica modified with 3‐aminopropyltrimethoxysilane as filler, and a series of polybenzimidazoles with different main‐chain structure as polymer matrix. Polybenzimidazoles (PBIs) were prepared from 3,3′‐diaminobenzidine and several dicarboxylic acids with different chem... hiện toàn bộ
Comparative study on the curing kinetics and thermal properties of a new series of diglycidyl esters of bis(trimellitimide)s
Polymers for Advanced Technologies - Tập 33 Số 5 - Trang 1569-1590 - 2022
Ehsan Abbasi, Ali Jannesari
AbstractThe non‐isothermal curing behavior of a new series of epoxy‐imide resins based on trimellitimide structures, synthesized in a three‐step procedure, were evaluated by differential scanning calorimetry. The chemical structures of the synthesized intermediates and their corresponding epoxy‐imide resins were characterized and confirmed by Fourier‐transform infrared spectroscopy and 1H‐NMR spec... hiện toàn bộ
Superabsorbent hydrogel composites
Polymers for Advanced Technologies - Tập 14 Số 6 - Trang 438-444 - 2003
Kourosh Kabiri, M. J. Zohuriaan‐Mehr
AbstractA new cost‐effective approach to enhance gel strength of superabsorbent hydrogels was invented. Superabsorbent hydrogel composites (SHCs) were prepared through an optimized rapid solution polymerization of concentrated partially neutralized acrylic acid in the presence of a crosslinking agent under normal atmospheric conditions. Kaolin was used as an inorganic component in the polymerizati... hiện toàn bộ
Layer‐by‐layer deposition of antimicrobial polymers on cellulosic fibers: a new strategy to develop bioactive textiles
Polymers for Advanced Technologies - Tập 24 Số 11 - Trang 1005-1010 - 2013
Ana P. Gomes, João F. Mano, João A. Queiroz, Isabel C. Gouveia
In recent years, there has been an increase of infectious diseases caused by different microorganisms and the development of antibiotic resistance. In this way, the search for new and efficient antibacterial materials is imperative. The main polysaccharides currently used in the biomedical and pharmaceutical domains are chitin and its derivative chitosan (CH) and alginates (ALG). In this study, a ... hiện toàn bộ
Flame retardant epoxy composites with epoxy‐containing polyhedral oligomeric silsesquioxanes
Polymers for Advanced Technologies - Tập 31 Số 9 - Trang 2058-2074 - 2020
Leichun Liu, Wenchao Zhang, Rongjie Yang
A kind of polyhedral oligomeric silsesquioxanes (POSS) containing the propoxyl‐epoxy and phenyl groups (pr‐ep‐Ph‐POSS) was synthesized via hydrolytic condensation reaction. Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance spectroscopy, and matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry identified the structure of the pr‐ep‐Ph‐POSS, including ... hiện toàn bộ
Enhancement of a hyperbranched charring and foaming agent on flame retardancy of polyamide 6
Polymers for Advanced Technologies - Tập 22 Số 12 - Trang 2237-2243 - 2011
Chenhao Ke, Juan Li, Keyi Fang, Qingzeng Zhu, Jin Zhu, Yan Qing
AbstractA hyperbranched polyamine was prepared using an A2 + B3 approach. It acted as a hyperbranched charring and foaming agent (HCFA) in combination with ammonium polyphosphate (APP) to form a new intumescent flame retardant (IFR) system for polyamide 6 (PA6). Effect of HCFA on flame retardant and thermal degradation properties of IFR‐PA6 was investigated by limiting oxygen index (LOI), UL‐94 ve... hiện toàn bộ
Super‐high fraction of organic montmorillonite filled polyamide 6 composite foam: Morphologies, thermal and mechanical properties
Polymers for Advanced Technologies - Tập 32 Số 2 - Trang 544-552 - 2021
Liang Wang, Wei Zhao, J. W. Zhao, Wen Qiao, Guocheng Zhu, Zhaopeng Xia, Yong Liu
High fraction of inorganic compounds filled polymer composites with lightweight character show a potential application on building and transportation. In this study, super‐high fraction of organic montmorillonite (OMMT>30%) filled Polyamide 6 (PA6) foams were prepared via a solution foaming. The influence of OMMT content on structures and properties of foams was studied. When the OMMT content was ... hiện toàn bộ
Effect of conjugated linoleic acid grafting on the hemocompatibility of polyacrylonitrile membrane
Polymers for Advanced Technologies - Tập 17 Số 6 - Trang 419-425 - 2006
Fu‐Chen Kung, Ming‐Chien Yang
AbstractPolyacrylonitrile (PAN) membrane was hydrolyzed with NaOH(aq) and grafted with conjugated linoleic acid (CLA) via esterification with 1,3‐propanediol. The resulting CLA grafted PAN membranes were characterized using Fourier transform infrared spectrometry (FT‐IR) and X‐ray photoelectronic spectroscopy (XPS). The effects of CLA grafting on the blood coagulation, platelet aggregation, and ox... hiện toàn bộ
The reduction of oxidative stress, anticoagulation of platelets, and inhibition of lipopolysaccharide by conjugated linoleic acid bonded on a polysulfone membrane
Polymers for Advanced Technologies - Tập 18 Số 4 - Trang 286-291 - 2007
Fu‐Chen Kung, Jung‐Jhih Chang, Ming‐Chien Yang
AbstractConjugated linoleic acid (CLA) was covalently bonded onto the surface of a polysulfone (PSF) membrane via esterification. The surface was characterized with contact angle measurement and FT‐IR spectrometery. The capability of bonded CLA on the suppression of oxidative stress was evaluated. The level of reactive oxygen species (ROS) was measured by the chemiluminescence (CL) method to evalu... hiện toàn bộ
A study on the micro‐injection molding of multi‐cavity ultra‐thin parts
Polymers for Advanced Technologies - Tập 22 Số 6 - Trang 891-902 - 2011
S.‐Y. Yang, Shih‐Chih Nian, S.‐T. Huang, Yung-Jin Weng
AbstractIn this study, we report the micro‐injection molding of ultra‐thin parts (100, 250, and 500 µm). The results show that the flow resistance increases as the cavity becomes thinner. The melt front is not symmetric when filling a four‐cavity ultra‐thin part and filling the eight‐cavity mold under a low temperature. If we increase the mold temperature or cavity thickness, the melt front become... hiện toàn bộ
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