最新刊期
卷 32 ， 期 11 ， 2019
- 摘要：By reviewing the history of tire development, the main structural characteristics and existing defects of traditional tires represented by the bias tires and radial tires were analyzed, indicating that novel tires were in urgent need of development. And the representative novel tire products including non-pneumatic tires and new pneumatic tires were summarized. Then,their structural characteristics and unique advantages compared with traditional tires were discussed. The study provided a guide for the direction of the development of tires in the future. Compared with traditional tires, non-pneumatic tires are generally safe,energy-saving, environmentally friendly and easy to maintain. The development of new pneumatic tires is actually improvement of traditional tires based on the scene of application.关键词：Non-pneumatic tires;Novel pneumatic tires;Structural features;Current situation and prospects
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发布时间：2022-09-05 - 摘要：As a renewable material, cellulose nanomaterials (CNs) have good performance for removal of the metal ions from wastewater dut to their excellent surface area, high crystallinity, high strength, high Young's modulus, high surface activity, and chemical stability. So, in this paper the modifications of cellulose and its application to adsorb heavy metal ions were reviewed. Firstly, the structure and naming method of nanocellulose are briefly introduced. Secondly,the modifications of nanocellulose (ie, small molecule modification and polymer modification) are introduced respectively,and the modified nanocellulose-based materials are focused on describing in application of removing water metal ions by adsorption in two different forms of powder and gel (including hydrogel and aerogel). Finally, the advantages and disadvantages of the modified nanocellulose-based absotbent materials were discussed, and the problems that the materials need to solve during the production and application process were pointed out.关键词：Cellulose;Adsorbent;Nanocellulose;Heavy metal;Modified
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发布时间：2022-09-05 - 摘要：γ-Mercaptopropyltriethoxysilane (KH-580) and vinyl-terminated polydimethylsiloxane (vinyl-PDMS) were successfully grafted onto the fabric via thiol-ene click reaction, thus, super hydrophobic fabric with excellent oil-water separation ability prepared. The modified fabrics were characterized by infrared spectroscopy, scanning electron microscopy and X-ray photoelectron spectroscopy. The surface hydrophobicity and oil-water separation performance were investigated and their results showd that the surface of the superhydrophobic fabric obtained was in gully and stripe structure with a contact angle of 156° and a rolling angle of 2°. 99.8% of the oil-water mixture could be separated by the fabric, and the ratio stayed around 99% after 20 cycles.关键词：Click reaction;Fabric coating;Superhydrophobic;Oil-water separation
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发布时间：2022-09-05 - 摘要：A novel epoxy resin toughening diluent (UE6M) containing epoxy polyurethane was synthesized by the coupling reaction of diphenyl-methane-diisocyanate(MDI) and domestic epoxy diluent 669. Different dosages of UE6M were added to pure epoxy resin(E51) to form epoxy blends, we recorded the viscosity changes of the blends with different content of UE6M, results showed that compared with pure epoxy resin(E51),the epoxy resin toughening diluent(UE6M)had a dramatically dilution effect on epoxy resin(E51),the viscosity of the mixed system with 30% and 40% UE6M were only 6.35% and 1.43%, respectively, of that of pure epoxy resin(E51). And then, the blends were cured with acetonitrile triethylenetetramine, we studied the effect of UE6M usages to the properties of the cured blends. Dynamic mechanical test and other mechanical test results confirmed the addition of UE6M to pure epoxy resin could induce toughening effect obviously: the tensile strengths of cured blends with 30% and 40% UE6M were 87.9% and 80.9% of that of the cured pure E51 epoxy resin, all exceed 60MPa! While the bending strength and modulus did not decrease significantly, the elongation at break was more than 8 times that of the cured epoxy resin, and the bending strain was more than 2 times that of the cured epoxy resin.关键词：669 Diluent;Urethane bond;Epoxy resin;Modification
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发布时间：2022-09-05 - 摘要：Absrtact: A dielectric elastomer is a material that can be deformed by applying a voltage to both ends thereof. Silicone-based dielectric elastomers have attracted much attention due to their high speed response, free preparation, and wide temperature range. The electric constant is low,the excitation electric field strength is high, and the electro-induced deformation is small,which restricts its development. Therefore,in view of these problems, nano-TiO2/silicone rubber composites were prepared by solution mixing method with liquid silicone rubber as the matrix and nano-TiO2 as filler. The dielectric properties and electro-deformation properties were tested. By adding nano-TiO2 to the polymer matrix, the dielectric constant is increased, the dielectric loss is reduced, and a large electro-induced deformation can be obtained.关键词：Silicone Rubber;Dielectric elastomer;Nano-TiO2;Dielectric properties;Electro-deformation
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发布时间：2022-09-05 - 摘要：In this thesis,aldehyde-free adhesives were prepared by different treatment methods. The influence factors, including treatment agents and its concentrations, crosslinking agents, varieties of proteins and its ratios of protein and thiourea, were investigated by universal material testing machine,differential scanning calorimeter and rotary rheometer. The properties of bonding strength,thermal properties, water and weather resistance and freeze-thaw stability were explored. The results show that the best protein type is whey protein and the concentration of the best treating agent of urea solution is 3mol/L and the mass of crosslinking agent of thiourea is 9g and the mass of sodium lignin is 4. 5g and the the mass of emulsion is 10g and its ratio for protein with thiourea is 30 : 9. Whey protein adhesive has moderate viscosity and good freeze-thaw stability and the best bonding strength, reaching 1758.2MPa. In addition, all the adhesives of water resistance is good, except for some poor weather resistance.关键词：Aldehyde-free adhesive;The bonding strength;Water resistance;Freeze-thaw stability
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发布时间：2022-09-05 - 摘要：High styrene rubber has high application potential due to its excellent tensile strength. This paper studies the effect of the amount of aramid pulp on the properties of high styrene rubber composites. The results show that after the addition of aramid pulp, the tensile strength, 100% modulus and 300% modulus of the composite increase gradually, and the elongation at break gradually decreases with the increase of the fraction of aramid pulp. The tear strength has increased. Compared with the composite material without aramid pulp, the storage modulus ratio (? ? ) of the composite material added with aramid pulp increased, and the Payne effect of the composite material decreased. The swelling degree test showed that the crosslink density of the composite increased after the addition of the aramid pulp. With the addition of aramid pulp, the heat generation of the composite increases.关键词：Aramid pulp;High styrene rubber;Mechanical properties;Heat generation
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发布时间：2022-09-05 - 摘要：Polymer rheology is one of core courses for the professional of polymer materials and engineering, and it is now widely used in the field of new energy. Polymer rheology is a highly theoretical course involving multiple subject knowledge, such as advanced mathematics, linear algebra, the principles of chemical engineering and polymer chemistry. In the teaching process within a limited time,it is of significance for the students to understand the service objectives and acquire enough theoretical knowledge. In the teaching process of polymer rheology, the aggregate teaching method could be used to stimulate the students' interest in learning, improve their learning efficiency and enhance the teaching quality of the teachers. The contents of the aggregate teaching method are as follows: Firstly, the service objectives should be proposed based on the portal of the applied courses. Secondly, a knowledge framework for the service goals should be established by collecting the decentralized knowledge. Thirdly, an appropriate amount of exercises based on the service goals must be well-designed to expand their thinking. Finally, all of the content should be summarized to outline a good beautiful feature for the students. The proposed aggregate teaching method may provide new ideas for the enhancement of teaching quality of application-oriented curriculum.关键词：Applied course;Aggregation;Teaching;Service target;Advanced
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发布时间：2022-09-05 - 摘要：In the applied talent training of polymer material professional,the CDIO engineering education concept was introduced, and the basic, applied,comprehensive and innovative principles of experimental teaching were highlighted. The student-centered SC-CDIO engineering model was proposed and established. Through the guidance of the first-level project, the third-level project is constructed to integrate, optimize and design the experimental practice of polymer materials specialty. The "integrated, three level" experimental teaching system of polymer material specialty was constructed. Implementation of teaching was based on student centered and teacher led principles. The procedural teaching quality evaluation system was established. The practice has proved that the students' experimental basic skills and comprehensive innovation ability have been effectively improved, and the quality of applied talent training has been improved.关键词：Polymer material speciality;SC-CDIO mode;Experimental teaching system
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发布时间：2022-09-05 - 摘要：The experiment is used NMR to determinate the reactivity ratio of the copolymerization reaction between styrene and methacrylate. Through the experiment teaching students mastered the method of the influence on the reactivity ratio with temperature changing. Students ability of connecting theory with practice is improved and abstract theory is actualized.Moreover it would be expanding students' vision and thinking. It also increased the interesting of the experiment and optimized the teaching method and curriculum system. In the end it produced good teaching results as well.关键词：Teaching;Ratio;NMR
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发布时间：2022-09-05 - 摘要：The Plan for Educating and Training Outstanding Engineers is of great significance to improve the quality of training talents in engineering education. The college of polymer science and engineering of Sichuan university has carried out preliminary exploration and practice on the training of outstanding engineers in polymer materials and engineering. The training objectives and training programs have been formulated. A series of methods, including optimizing the education program, strengthening the construction of the enterprise and school mentors, strengthening the construction of practice base, improving the management system, have been applied to cultivate talents during the cooperation between school and enterprise. And a group of outstanding engineers with a solid professional foundation, strong engineering practice ability and innovative entrepreneurial ability were cultivated in the past years. This research has certain reference significance and promotion value for the training of outstanding engineers in universities.关键词：Outstanding engineers;Coalition of college and enterprise;Polymer materials and engineering
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发布时间：2022-09-05 - 摘要：This paper firstly analyzed with the theory of engineering education accreditation, reviewed the literature on the construction and management of graduation practice at home and abroad, and summarized, analyzed and sorted it out, and then put forward the graduation practice of polymer materials and engineering specialty should reach index point, the article analyzes the problems existing in graduation practice, according to the engineering accreditation index point, put forward the double tutorial system, appraisal system and contents, and the research plan of "construction of four" and "three relying on" in the graduation practice base. Finally,through practice, it was found that this research method could be used in the teaching process of graduation practice, and the graduation practice results were improved obviously, and concluded degree was 0. 84.关键词：Engineering certification;Graduation practice;Practice base;Teaching reform
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发布时间：2022-09-05
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