最新刊期
- 摘要：Hydroxyl-terminated polybutadiene polyurethane (HTPB-PU) is one of the binders widely used in solid propellants at present. Although it has to withstand the high internal pressure during the ignition phase, there is still a lack of research on the microstructure and mechanical properties of HTPB-PU under high confining pressure. In this work, the tensile mechanical properties of a soft HTPB-PU under different confining pressures (0–6.0 MPa) and initial tensile strain rates (0.0075–0.3750/s) were tested by using a self-made tensile experiment system equipped with high confining pressure device. Combined with different microstructure characterization methods, the coupling effects of confining pressure and strain rate on the tensile failure behavior and mechanical properties of HTPB-PU were analyzed. The results showed that the tensile mechanical parameters of HTPB-PU increased with increasing strain rate, while the confining pressure reduced the strain rate sensitivity of the tensile property of the fabricated HTPB-PU. Applying confining pressure can enhance microphase separation, and suppress the plastic deformation in HTPB-PU, thus improving its elastic modulus, yield strength, and tensile strength and elongation at low strain rate (0.0075/s). At high strain rates (0.0750/s and 0.3750/s), the tensile strength and elongation decrease with increasing confining pressure due to the rapid development of plastic deformation in the local stress concentration region owing to the high stress level within HTPB-PU. Finally, the models of elastic modulus and yield stress of the fabricated HTPB-PU were established based on the time-pressure superposition principle and experimental data. The calculation showed that the established model could accurately predict the elastic modulus and yield stress of HTPB-PU under different confining pressures and strain rates.关键词：Hydroxyl-terminated polybutadiene polyurethane;Confining pressure;Strain ratel;Fracture mechanism;Constitutive model6|0|0更新时间：2026-05-11
- 摘要：The melt flow index (MFI) of low-density polyethylene (LDPE) significantly affects its crosslinking characteristics and the properties of crosslinked polyethylene (XLPE). However, owing to the difficulty in obtaining LDPE samples with gradient MFI values as the sole variable, the literature lacks direct evidence regarding the influence of the MFI of LDPE on its crosslinking characteristics and the performance of the resulting XLPE. Herein, based on five LDPE samples with gradient MFI values, a series of LDPE/crosslinking agent compounds were prepared and crosslinked to obtain XLPE using a rotorless rheometer and a flat-plate vulcanizing machine. The crosslinking characteristics of LDPE and the structure-property relationships of the resulting XLPE were systematically investigated. The results indicated that lowering the MFI of LDPE would lead to an extended scorch time (t10), while showing no significant effect on the curing time (t90). Both the crosslinking degree (Dc) and the average number of crosslinking points per polymer chain (γ) in XLPE monotonically decreased as the MFI of LDPE increased. Mechanical property tests showed that both the tensile strength of XLPE and the resistance to creep monotonically enhanced with an increase in the Dc of XLPE. Meanwhile, the melting temperature of XLPE decreases with a reduction in the degree of crosslinking. This study established a mapping relationship among the MFI of LDPE, the microstructural parameters of XLPE, and the macroscopic performance of XLPE, providing a reference for rationally designing the MFI of LDPE and enhancing the comprehensive performance of XLPE.关键词：Low-density polyethylene;Crosslinked polyethylene;Crosslinking degree;Melt flow index4|0|0更新时间：2026-05-11
- 摘要：In response to the Ministry of Education’s call for “research feeding back into teaching” and to address the low prevalence of experiments on organic polymer porous materials in undergraduate teaching, this study leverages the research group’s preliminary achievements to transform the high-performance sponge preparation technology based on the Hofmeister effect into an undergraduate experimental teaching project. In this experiment, we used poly(vinyl alcohol) (PVA) as the raw material and glycerol, calcium chloride, and sodium citrate as additives, achieving the sol-gel transition of PVA solution through the synergistic effects of multiple components, successfully producing hydrophilic porous sponges. The experimental principles are intuitive, the operational difficulty aligns with the theoretical knowledge and skill levels of undergraduates, and the phenomena are distinct with strong extensibility. It has been successfully implemented in the “comprehensive experiments” course for chemical engineering and technology majors at Fuzhou University. Teaching practice demonstrates that students can complete the entire process from material synthesis to performance testing, not only deepening their understanding of relevant theoretical knowledge and enhancing their comprehensive practical abilities, but also stimulating research interest and innovative thinking, providing a valuable model for building a new engineering experimental curriculum system that integrates science and education.关键词：Hofmeister effect;Poly(vinyl alcohol);Sponge;Feeding back of research into teaching;New engineering experiments4|0|0更新时间：2026-05-11
- 摘要：In the context of accelerating the construction of an innovative country and focusing on breaking through the “knockout” problems in high-tech fields, enhancing the innovation ability of graduate students has become the core task of higher education. In response to current issues such as unclear learning goals for material science graduate students, the constraints of traditional educational models on innovative spirit, and the imperfect mechanism for cultivating practical abilities, the functional elastomer research group of Donghua University has conducted continuous exploration for ten years and has constructed a graduate student innovation ability cultivation model based on the “dynamic development concept of materials science” as the training philosophy. This model is guided by “comprehensive virtue and talent”, and through a three-dimensional progressive training system of “education and teaching−industry-academia practice−scientific research”, it integrates multiple paths such as curriculum ideological education, scientific and educational collaboration, joint cultivation through university-industry cooperation, and collaborative management and development of platforms and instruments, and implements the “three 100%” training principles to comprehensively enhance the innovative thinking and practical abilities of graduate students. Practice has shown that this model provides a replicable practical model for the innovation cultivation of material science graduate students and is of great significance for promoting the precise alignment of higher education with industrial demands and contributing to the construction of a material power country.关键词：Materials science;Dynamic development perspective;Postgraduate training model;Integration of science and education;Multi-dimensional and full process4|1|0更新时间：2026-05-11
- 摘要：To overcome the drawbacks of conventional supercapacitor preparation, which involves complicated and time-consuming procedures that are difficult to complete within limited class hours, a comprehensive laboratory project entitled “in situ rapid integration and applications of flexible supercapacitors” is developed for undergraduate students majoring in polymer science and engineering. The experiment employs aldehyde-amine condensation to achieve rapid sol-gel transition within 5 min at room temperature, and the supercapacitor is further constructed viain situ integration, delivering a specific capacitance of up to 105.4 F/g, which greatly improves the efficiency of experimental teaching. The project covers hydrogel synthesis, device assembly, performance measurement and application demonstration, integrating interdisciplinary knowledge of polymer chemistry, polymer physics and electrochemistry. Through systematic implementation, students’ practical skills, analytical ability and interdisciplinary thinking are cultivated, and the understanding of cutting-edge developments in related fields is enhanced, demonstrating favorable teaching effects.关键词：Experimental design;Teaching methodology;Supercapacitor;Hydrogel;In situ integration1|0|0更新时间：2026-05-11
- 摘要：Poly(methyl vinyl ether-alt-maleic anhydride) (PMVEMA), a water-soluble polymer, exhibits the typical characteristics of electrolyte polymers and offers advantages such as an easily modifiable structure, excellent adhesive properties, and biocompatibility. Therefore, PMVEMA has been widely utilized in studies of high value-added fields. This article introduces the structure-property relationships, industrial synthesis methods, and current problems associated with PMVEMA. Moreover, focusing on the structural modification and functional role of PMVEMA, this review systematically reviewed its research progress in the fields of batteries, environmental protection, and biomedical applications in recent years, including lithium-ion batteries, perovskite solar cells, wastewater treatment, pesticide degradation, bioimaging, drug delivery, skin patches, and antibacterial materials. On this basis, combined with various fields, this review further explores the current challenges and future development directions of PMVEMA in industrial applications. We hope that this review can provide a reference and inspiration for the industrialization study and application of PMVEMA.关键词：Poly(methyl vinyl ether-alt-maleic anhydride);Polymer electrolyte;Adhesive property;Biomedical applications12|0|0更新时间：2026-05-09
- 摘要：With the development of society, the trend of cross-disciplinary integration is becoming increasingly evident, and the advancement of science and technology requires more scientific researchers who are proficient in cross-disciplinary knowledge. The field of biomedical polymer materials has a strong interdisciplinary nature, and students in this field need to possess knowledge in polymer materials, biology, and medicine. As the cradle for cultivating high-end talents and an important place for conducting scientific research, universities need to shoulder the responsibility of cultivating interdisciplinary talents. This article focuses on the cultivation methods for students in the field of biomedical polymer materials in universities. It will explore the cultivation strategies in a university environment from aspects such as cross-disciplinary training models, systematic scientific research training, project-based cultivation, and incentives for the industrial transformation of scientific research achievements, providing references for the cultivation of students in this field in the new era.关键词：University student cultivation;Interdisciplinary integration;Medicine-engineering combination;Project-based training;Biomedical polymers15|0|0更新时间：2026-05-09
- 摘要：The advancement of intelligent manufacturing is driving the evolution of polymer processing into a new developmental stage. Artificial intelligence technologies, particularly machine learning (ML), have become key enablers for overcoming the limitations of traditional empirical methods and achieving intelligent optimization of processing workflows. In response to the current gap between ML education and real engineering applications in polymer materials curricula, this study introduces a teaching innovation that integrates data-driven intelligence with professional practice through an undergraduate hollow blow molding experiment. Specifically, a hybrid approach combining a BP neural network with a genetic algorithm was applied to optimize five critical process parameters in hollow blow molding: die temperature, mold closing speed, airflow rate, blowing time, and cooling time. A predictive model was developed to identify the optimal parameter set for maximizing the vertical compressive strength of molded parts. Experimental validation confirmed the effectiveness of this approach, establishing a complete instructional loop encompassing component fabrication, data collection, model building, algorithmic optimization, and result verification. The redesigned course not only strengthens students’ mastery of conventional polymer processing techniques but also guides them through the entire workflow of applying ML to real-world process optimization. This initiative effectively bridges ML theory with practical manufacturing scenarios, while deepening students’ understanding of the “process-structure-property” relationship in polymer science and fostering computational thinking framed around “data-model-decision”. The project offers a replicable model for cultivating talent capable of supporting the transformation and upgrading of the intelligent polymer manufacturing industry.关键词：Hollow blow molding;Machine learning;Teaching innovation;Curriculum development;Polymer processing13|1|0更新时间：2026-05-09
- 摘要：“Plastic Processing Technology” course occupies a core position in the curriculum of the polymer materials and engineering major. Traditional teaching methods have the problem of insufficient connection between theory and practice, making it difficult to achieve ideal results. Therefore, problem-driven teaching methods are introduced into “Plastic Processing Technology” course. Based on the authors’ years of teaching practice experience, the design is carried out from two aspects: selection of content and design of problems. The teaching content is divided into three major modules: process physics and chemistry, raw material selection and configuration, and major molding processes, focusing on the relationship between plastics, plastic parts, equipment, and processes, and making appropriate choices. The design of problems involves setting a large question for each class, introducing necessary knowledge points around completing it, and then using small questions for classroom discussions to test learning effectiveness. By continuously improving teaching design and closely linking key molding technology issues with theoretical knowledge, it is preliminarily indicated that the teaching effectiveness of “Plastic Processing Technology” courses can be significantly enhanced.关键词：Plastic processing;Problem-driven teaching;Teaching design13|0|0更新时间：2026-05-09
- 摘要：Against the strategic backdrop of the country advancing new industrialization and developing advanced manufacturing industries, Shandong University of Petroleum and Chemical Technology, as a local application-oriented university, aims to cultivate application-oriented talent as its core goal. To align with the development needs of key industries in Dongying City and to strengthen students’ abilities to integrate theory with practice and engage in innovative experimentation, the applied chemistry major of the university launched the course “Open Innovation Experiments” constructed a project-based teaching model, and explored new pathways for talent cultivation through the integration of industry-education and science-education. Taking the project “preparation and breakdown performance characterization of hyperbranched polyimide” as an example, the project takes the acid-amine condensation reaction from the “Organic Chemistry” course and the X-ray diffraction analysis from the Instrumental Analysis course as its core knowledge components and adopts the implementation path of “laboratory preparation and characterization + application performance comparison + mechanism simulation”. First, students were guided to complete the preparation and characterization of hyperbranched polyimide films in the laboratory. Second, students were led to explore the influence of test conditions on test results in a collaborative enterprise. Finally, it digs deep into the internal mechanism of how test conditions affect test results was investigated through multiphysics simulation, realizing the in-depth connection between scientific research, teaching practice, and industrial needs. The project implementation not only effectively improves students’ ability to solve practical industrial problems but also provides a referable practical paradigm for science and engineering majors in application-oriented universities to deepen teaching reform, practice industry-education integration and science-education integration, and cultivate high-quality applied talents.关键词：Industry-education integration;Science-education integration;Project-based teaching;Hyperbranched polyimide;Breakdown performance10|0|0更新时间：2026-05-09
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