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Traditional combat sports equipment usually uses synthetic materials, such as polyurethane and synthetic leather. Although these materials have a certain degree of strength and durability, they have poor flexibility and antibacterial properties, making it difficult to provide stable support and protection for athletes. In order to enhance the antibacterial properties and flexibility of sports equipment and reduce the risk of injuries to athletes, this article conducts in-depth research on the development of combat sports equipment using conjugated polymers. This article first selects polypropylene (PP) as the base material for sports equipment for combat athletes, and uses the gas phase polymerization method to prepare the material; then uses chitosan as an antimicrobial agent and uses the oxidative degradation method to prepare it; after that, this article coats the chitosan antibacterial agent on the prepared PP material, and uses a combination of dipping and calendaring for antibacterial treatment; finally, this article uses the spunbond melt-blown composite method to fill and combine the top equipment of combat athletes to achieve the structural design of sports equipment. In order to verify the effectiveness of the equipment, this article conducted equipment performance testing and sports injury simulation. The results showed that the average diameter of the antibacterial zone of this sports equipment reached more than 1 mm, and in the injury risk test, the risk of athletes' joint and muscle injuries was reduced by 16.9% and 20.5% respectively. Research shows that developing combat sports equipment based on conjugated polymers can help reduce the risk of injury to athletes and improve the safety of combat sports. [ABSTRACT FROM AUTHOR]

Traditional combat sports equipment usually uses synthetic materials, such as polyurethane and synthetic leather. Although these materials have a certain degree of strength and durability, they have poor flexibility and antibacterial properties, making it difficult to provide stable support and protection for athletes. In order to enhance the antibacterial properties and flexibility of sports equipment and reduce the risk of injuries to athletes, this article conducts in-depth research on the development of combat sports equipment using conjugated polymers. This article first selects polypropylene (PP) as the base material for sports equipment for combat athletes, and uses the gas phase polymerization method to prepare the material; then uses chitosan as an antimicrobial agent and uses the oxidative degradation method to prepare it; after that, this article coats the chitosan antibacterial agent on the prepared PP material, and uses a combination of dipping and calendering for antibacterial treatment; finally, this article uses the spunbond melt-blown composite method to fill and combine the top equipment of combat athletes to achieve the structural design of sports equipment. In order to verify the effectiveness of the equipment, this article conducted equipment performance testing and sports injury simulation. The results showed that the average diameter of the antibacterial zone of this sports equipment reached more than 1 mm, and in the injury risk test, the risk of athletes' joint and muscle injuries was reduced by 16.9% and 20.5% respectively. Research shows that developing combat sports equipment based on conjugated polymers can help reduce the risk of injury to athletes and improve the safety of combat sports.

الملخص: أهداف البحث: لتقييم ومقارنة معامل الانحناء ونفاذية الضوء بين مادة البولي بروبيلين ومادة الكوبوليستر البلاستيكية الحرارية وبين عوامل التنظيف الأربعة على كل مادة بعد التعرض طويل الأمد لطرق التنظيف المختلفة. طرق البحث: تم استخدام مائة وعشرين قطعة موحدة من مادة المثبتات البولي روبيلين والكوبوليستر في هذه الدراسة بعد تشكيلها بالحرارة. تم تقسيمها بالتساوي إلى ست مجموعات فرعية: (كما وردت، اللعاب الاصطناعي، الكلورهيكسيدين، غسول الفم الكحولي وغير الكحولي، وحبيبات تنظيف المثبت). خضعت هذه القطع لعملية تنظيف بموجب البروتوكول التالي: 15 دقيقة غمر، ثلاث مرات اسبوعياً، لمدة ثلاثة أشهر. بعد ثلاثة أشهر، تم قياس معامل الانحناء ونفاذية الضوء لجميع العينات باستخدام اختبار الانحناء بثلاث نقاط ومقياس الطيف الضوئي على التوالي. تم تطبيق اختبار تحليل التباين الأحادي الاتجاه واختبار تي المستقل لمقارنة الوسائل، وتم استخدام اختبار التوكي عندما كان هناك فرق كبير. النتائج: أظهرت النتائج الإحصائية لكل نوع من أنواع المثبتات أن قيم معامل الانحناء لمثبت الكوبوليستر تختلف إحصائيا عن مادة البولي بروبيلين في غسول الفم الكلورهيكسيدين، وغسول الفم الكحولي، وحبيبات تنظيف المثبت. بينما كان للكوبوليستر فرق معنوي في نفاذية الضوء من البولي بروبلين في جميع الظروف. لم يكن هناك فرق معنوي في قيم معامل الانحناء بين الظروف المختلفة، بينما كان هناك فرق معنوي في نفاذية الضوء بين غسول الفم الكحولي والظروف المختلفة لمادة البوليستر. الاستنتاجات: بناءً على هذه النتائج، يمكن استخدام أي عامل تنظيف بأمان لكلتا المادتين دون التأثير على معامل المرونة. ومع ذلك، فإن غسول الفم الكحولي قلل من نفاذية الضوء لنوع مثبت الكوليستر. Abstract: Objectives: This study aimed to evaluate and compare the effects of four cleaning agents on the flexural modulus and light transmittance properties of polypropylene and copolyester thermoplastic retainer materials after long-term exposure. Methods: A total of 120 pieces of standardized copolyester and polypropylene retainer materials were tested after being thermoformed. They were divided equally into six subgroups: as-received, artificial saliva, chlorhexidine, alcohol-based and alcohol-free mouthwashes, and Retainer Brite®. The pieces were subjected to a cleaning process involving 15 minute immersion three times weekly for 3 months. The flexural modulus and light transmittance were then measured for all specimens with three point bending tests and spectrophotometry, respectively. One-way ANOVA and independent samples t-test were applied to compare the means, and Tukey's post hoc test was used in cases of significant differences. The threshold for significance was 0.05. Results: For each retainer type, the statistical results revealed that the flexural modulus values of the copolyester retainer material significantly differed from those of polypropylene material under chlorhexidine mouthwash, alcohol-based mouthwash, and Retainer Brite® conditions. Copolyester and polypropylene showed significant differences in light transmittance under all conditions. No significant difference in flexural modulus values was observed among conditions, whereas significant differences in light transmittance were observed between alcohol-based mouthwash and the other conditions for copolyester material. Conclusions: According to our results, any cleaning agent can be safely used for both materials without affecting the elastic modulus. However, alcohol-based mouthwash decreases the light transmittance of copolyester retainer material.

Spectral calibration is one of the key technologies for quantitative application of imaging spectrometer. Based on analyzing the spectral calibration principle of Fourier transform imaging spectrometer, a spectral calibration method of long-wave infrared imaging spectrometer based on material characteristic spectrum is proposed in this paper. Polypropylene film and surface blackbody are employed for spectral calibration experiment. Using surface blackbody for temperature control, the interference data of polypropylene film at different temperatures are collected and the position of absorption peaks of polypropylene film are obtained, which compared with the position of the standard absorption peaks of polypropylene film, and the result proved that the proposed method has high calibration accuracy and good stability, and has reliable reference value for spectral calibration of long-wave infrared imaging spectrometer. [ABSTRACT FROM AUTHOR]