最新刊期
卷 37 ， 期 4 ， 2024
- 摘要：The applications, acceptance, review, and funding of projects in the organic polymer materials discipline of the national natural science foundation of China in 2023 are introduced. The performance evaluations of the final projects in 2022 are analyzed. In addition, recent significant advancement in the field of organic polymer materials are discussed. Lastly, the prospects for future work in the discipline are elaborated.关键词：Organic polymer materials discipline;National Natural Science Foundation of China;Science foundation reform586|694|0更新时间：2024-03-25
- 摘要：Polylactide (PLA) is a biodegradable polymer with excellent biocompatibility, mechanical properties, and processing properties, which has been widely used in fields such as medicine and food packaging. However, the slow crystallization rate, low crystallinity, and poor heat resistance of PLA seriously restrict its application in high-temperature environments. The research progress of heat-resistant modification of PLA at home and abroad is reviewed. The progress of improving the heat resistance of PLA by means of chemical copolymerization, crosslinking, blending and external field (heat treatment, stretching) is emphasized. The development prospect of heat-resistant polylactic acid materials is prospected.关键词：Polylactide;Heat resistance;Crystallization;Blending;Stereocomplex681|836|0更新时间：2024-03-25
- 摘要：The limited supply of natural rubber and the high demand for rubber have promoted the development of synthetic rubber. Metal-catalyzed coordination polymerisation is the main route for the synthesis of highly regular rubber materials today. Transition metal iron catalysts are of great importance in the preparation of synthetic rubbers due to their abundance, low price, low toxicity, high activity and high selectivity. This work summarizes the recent progress of Ziegler-Natta ternary iron catalysts, N,N-bidentate ligand and N,N,N,-tridentate ligand supported iron catalysts in 1,3-diene monomer polymerization. The relationship between catalytic performance such as polymerization activity, selectivity, polymer molecular weight and its molecular weight distribution, and other factors such as catalyst composition, structure and polymerization conditions are illustrated. This review could provide references and ideas for the design and synthesis of high-performance 1,3-diene polymerization iron catalysts.关键词：Iron catalyst;1,3-Diene;Coordination polymerization;Selectivity295|350|0更新时间：2024-03-25
- 摘要：Membrane separation technology has received wide attention in the field of carbon capture due to its advantages of high selectivity, low cost, green and non-polluting. Composite membranes, due to their ultrathin separation layer structure, show performance advantages in gas separation that homogeneous membranes do not have. This review introduces the principle of gas separation by membrane method and the composite membrane materials currently used in carbon capture technology, and summarizes the applications of composite membranes for carbon capture and their research progress at home and abroad. Finally, it analyzes the challenges and future development direction of composite membranes in the field of carbon capture.关键词：Composite membrane;Carbon capture;Gas separation;Application669|751|0更新时间：2024-03-25
- 摘要：Zwitterionic polymers with both cationic and anionic charged moieties on the same side chain display electroneutrality, which have attracted considerable attention due to their unique molecular structure and physicochemical properties. Zwitterionic polymers have a strong hydration capability, which can form a dense hydration layer on the surface of the material by binding water molecules, making it a good choice for the functionalization of coating materials and has potential application value in many fields. In this review, the categories of zwitterionic polymers and the preparation methods of polymeric coatings were firstly introduced, and then the application research of zwitterionic materials in marine antifouling, biomedicine and membrane separation technology was described. Finally, the development of zwitterionic polymeric coatings was summarized and prospected.关键词：Zwitterionic polymers;Polymeric coatings;Membrane separation technology;Marine antifouling;Biomedicine603|1143|0更新时间：2024-03-25
- 摘要：Solution homopolymerization of 1-butene was performed in a microchannel reactor constructed of 1/8-inch stainless steel tube, using rac-Me2Si(2,5-Me2-4-Ph-ThCp)2ZrCl2 metallocene as the main catalyst, methylaluminoxane (MAO) as the cocatalyst, and xylene as the solution. In this study, continuous polymerization of 1-butene was achieved in the microchannel reactor, and the structure and properties of the polybutylenes were characterized.关键词：Microchannel reactor;Metallocene;1-Butene;Solution polymerization163|344|0更新时间：2024-03-25
- 摘要：A series of ligands L1–L4 were synthesized by Schiff base condensation reaction of 2-acetylpyridine/pyrrole with p-phenylenediamine and carbazide catalyzed by glacial acetic acid/microwave radiation. Complexes 1–8 were further synthesized by reaction with cobalt/nickel chloride in methanol/tetrahydrofuran. The comprehensive structural characterization of the product was carried out using elemental analysis, nuclear magnetic resonance spectroscopy, infrared spectroscopy, ultraviolet spectroscopy, and X-ray single-crystal diffraction. It was found that the ligands L1–L3 has a diamine bridged double imine pyridine/pyrrole structure, L4 has a single imine pyrrole structure, and complexes 1–6 are all binuclear complexes, while complexes 7 and 8 are mononuclear. In the ligand synthesis experiment, it was found that the yield of L1 was the highest, reaching 89.8%, indicating that aniline has stronger nucleophilicity compared to linear amines and is more conducive to the generation of products. Through a systematic study of the relationship between the catalytic behavior of complexes 1–8 for the polymerization of methyl methacrylate (MMA) and the catalyst structure and polymerization reaction conditions, it was found that when the polymerization time was 6 h, the temperature was 90 ℃, the ratio of monomer to catalyst n(M)/n(Ni) was 3000:1, and the ratio of main catalyst to initiator n(Ni)/n(AIBN) was 2:1, the catalytic activity of the double imine ligand Ni(II) complex formed by the condensation of 2-acetylpyridine and p-phenylenediamine was the highest, reaching 4.3281×104 g∙mol-1∙h-1.关键词：Pyrrole/pyridine;Diamine;Cobalt/nickel complex;Polymerization catalysis132|145|0更新时间：2024-03-25
- 摘要：Using tert-butyl hydroperoxide (TBHP) and α,α'-dihydroxy-1,3-diisopropylbenzene (Diol) as the reaction material, and acetic anhydride was used as dehydrating agent to remove water from 70% TBHP. The acetic acid generated after the reaction of acetic anhydride with water was used as the catalyst to synthesize bis(tert butyl peroxyisopropyl) benzene (BIBP). The effects of material ratio, reaction temperature, reaction time, drying temperature, drying pressure, and drying time on the synthesis of crosslinking agent BIBP were studied. The optimal reaction conditions were as follows: the reaction temperature was 50 ℃, the reaction time was 30 min, the mass ratio of TBHP/ acetic anhydride was 1/2, the molar ratio of TBHP/Diol material was 2.2/1, the vacuum flash drying temperature was 50 ℃, the pressure was –0.095 MPa, and the time was 1 h. Under the synthetic conditions, the BIBP product was a pure white solid with a purity of 98.930% and a yield of 91.85%.关键词：Organic peroxides;Crosslinking agent;Di(tert-butylperoxyisopropyl) benzene302|498|0更新时间：2024-03-25
- 摘要：The rapid and non-isothermal crystallization behavior of ultra-high molecular weight poly-ethylene (UHMWPE) and paraffin oil mixed system from separator by wet process during extrusion casting was studied. The microstructure characteristics of different solid content systems under different cooling rates were characterized using Flash DSC and conventional DSC techniques. The results show that when the cooling rate is below 104 K/min, the initial crystallization temperature slowly decreases with the increase of cooling rate, and the obtained crystal melting temperature and thickness decreases with the increase of cooling rate; When the cooling rate is higher than 104 K/min, the initial crystallization temperature rapidly decreases with the cooling rate, while the crystal thickness does not change much; The higher the casting roll temperature, the higher the melting temperature of crystal of the cast film, the thicker the crystal thickness, and the higher the solid content of UHMWPE, the greater the difference between the crystal melting temperature and crystal thickness of the cast film obtained by high and low temperature casting rolls.关键词：Wet separator;Extrusion casting;Crystallization temperature;Crystal thickness;Ultra-high molecular weight polyethylene (UHMWPE)257|305|0更新时间：2024-03-25
- 摘要：Polypyrrole (PPy) is used as an electrode material for supercapacitors due to its high specific capacitance, high conductivity, high flexibility and structural diversity. It can be compounded with other materials to improve dielectric loss and absorption performance. PPy-coated silicon carbide (SiC) aerogel composites were synthesized by chemical in-situ polymerization, which effectively solved the problems of the decline of cycle stability of PPy-based supercapacitors induced by the ion doping/dedoping during the charging/discharging process. The electrochemical performance of the composite material was measured by the three-electrode system, and the electromagnetic parameters were tested with the vector network analyzer. The results show that the specific capacitance reaches 309.65 F·g-1 at a current density of 0.5 A·g-1, and the specific capacitance retention rate is 94.2% after 1000 cycles, indicating good cycle stability. The aerogel can maintain a height of 95% subjected to 100 repeated pressure. The compressive strength is 105 kPa. The effective absorption intensity at 2.2 GHz is 22.32 dB, while the value for PPy is only 8.99 dB, which effectively improve absorption intensity. Therefore, SiC/PPy composites are promising electrode materials for supercapacitors and electromagnetic wave absorbing materials.关键词：Silicon carbide;Polypyrrole;Aerogels;Composites;Electrochemical performance;Absorbing materials186|449|0更新时间：2024-03-25
- 摘要：The anchor group of polymeric dispersants absorbed onto the pigment surface, aiding in improving the stability of the pigment suspension. The content of anchoring groups affects the adsorption effectiveness of the dispersant and the stability of the pigment. In this study, a series of polymeric dispersants with varying contents of anchoring group were prepared via solution polymerization, using different additions of styrene and hydroxy polyethylene glycol methacrylate (HO-PEG-MA). These dispersants were employed for the dispersion of pigment violet 23. The particle size, storage stability, and surface adsorption capacity of pigment suspension were characterized. When the molar ratio of styrene to hydroxy polyethylene glycol methacrylate was 3:1, the particle size of pigment suspension was 191.3 nm and the stability of pigment suspension was optimal.关键词：Organic pigments;Polymer dispersants;Anchoring groups;Stability;Pigment suspension217|492|0更新时间：2024-03-25
- 摘要：The self-assembly behavior of cyclic diblock copolymers under soft confinement was studied by means of Monte Carlo simulation. The simulation results show that by adjusting the block ratio, the cyclic AB diblock copolymers can form various ordered structures under soft confinement, such as pupa-like particles with alternating layers formed by A and B blocks, ellipsoidal particles with cylinders formed by A blocks surrounding the phase formed by B blocks, and patch-like particles with hexagonally packed blocks formed by A blocks. By investigating the effects of the incompatibility between different blocks and the hydrophobicity of blocks on the morphology and self-assembly process of the system, the simulation results indicate the formation conditions for patch-like particles. In systems with weak hydrophobicity of blocks or strong incompatibility between different types of blocks, the minority blocks A prefer to form patch-like particles with blocks embedded in the continuous phase formed by the majority blocks B. The simulation results above can provide theoretical basis and new ideas for the potential application of cyclic diblock copolymers in the field of nanomaterials, and further understand the self-assembly behavior of cyclic diblock copolymers under soft confinement.关键词：Cyclic block copolymer;Soft confinement;Self-assembly;Monte Carlo simulation268|221|0更新时间：2024-03-25
- 摘要：Traditional oil-water emulsions are not suitable for the study of water-sensitive systems. The anhydrous nature of oil-in-oil emulsions provides opportunity for water-sensitive substances and reactions, however there are limited stabilizers. In this experiment, the polymers with adjustable amphipathicity were synthesized by the efficient and stable thiolactone chemistry and click reaction, and then used to stabilize the oil-in-oil emulsions. Poly(amide-thioether) was synthesized via a two-step acrylamide thiolactone-amine reaction in one pot. The effects of alkylamines with different chain lengths on the chemical structure and surface hydrophobicity of poly(amide-thioether) were investigated, and the relationship between the hydrophobicity of the stabilizers and the type of emulsion was also explored. This experiment can expand students’ knowledge about water-free emulsion and new polymerization reactions, deepen students’ understanding of relevant principles in the field of interface chemistry, and cultivate students’ innovative consciousness and comprehensive experimental ability.关键词：Thiolactone chemistry;Stabilizer;Oil-in-oil;Emulsion285|194|0更新时间：2024-03-25
- 摘要：Taking the research hotspot of malleable thermosetting polymers, and combining it with the author’s research achievements and experimental teaching experience, a comprehensive polymer experiment project with teaching feasibility is designed by extracting contents from scientific research projects that can showcase the frontiers of the discipline and reflect academic value. The project focuses on the synthesis and properties research of recyclable thermosetting polyurethane foam. This experiment project is rich in content and comprehensive, covering relevant knowledge in polymer chemistry, polymer physics, and polymer processing. By implementing a reasonable plan and employing distinctive teaching methods, it highlights the students’ subject position in the experiment, stimulates their active learning and enthusiasm, and cultivates their research thinking and innovation ability.关键词：Vitrimer;Disulfide bond;Recyclable foam;Crosslinking;Comprehensive experiment252|367|0更新时间：2024-03-25
- 摘要：According to the objectives and standards of engineering education certification, this paper analyzes the problems existing in the teaching process based on the the current situation and characteristics of the Polymer Physics course of polymer materials and engineering major in Guangdong University of Technology, and further explores the combination of multiple teaching methods, teaching and research integration, and the combination of Chinese and English online and offline dual-chain teaching mode that is suitable for the training objectives of polymer majors. In this paper, we conducts new teaching reform from the teaching environment, teaching design and organization, teaching resource base construction, teaching implementation methods and multi-dimensional evaluation methods, hoping to provide some experience for the innovation and reform of the talent training model of polymer major.关键词：Polymer physics;Engineering education;Bilingual teaching;Online/Offline hybrid course247|99|0更新时间：2024-03-25
- 摘要：Strengthening the “dual carbon” higher education to assist in achieving carbon peaking and carbon neutrality has proposed a new challenge for the cultivation of talent in the new era. This article analyzes the current status of the “Functional Polymer Materials” course and considers teaching reform for curriculum content under the concept of “dual carbon”. It proposes to integrate the design and synthesis of temperature-sensitive hydrogels and its application in smart windows into the teaching system. In this reform, we implement the concept of “dual carbon” throughout the experimental principles, objectives, and application research. By transforming cutting-edge research in the field into undergraduate laboratory teaching, it aims to comprehensively enhance students’ scientific literacy, teamwork skill, as well as innovative practical ability. This approach provides sustainable talent support and a foundation for achieving the “dual carbon” goals.关键词：“Dual carbon”;Teaching reform;Temperature-responsive hydrogels;Smart window423|2291|0更新时间：2024-03-25
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