共查询到19条相似文献,搜索用时 93 毫秒
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概述了近年来与环境治理的有关的一个重要主题-高分子材料循环利用的发展状况的新型循环技术,同时对高分子材料循环存在的问题,将来的发展趋势和前景作了讨论。 相似文献
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对开发用于西部地区农业现代化的高性能高分子材料的思考 总被引:3,自引:1,他引:3
对如何采用先进、高效、清洁的新技术为西部地区农业现代化提供高性能农膜、地膜、棚膜、节水灌溉、棚架、农产品包装、农副产品加工污水处理等方面用的高性能高分子材料的研究内容和技术经济指标等进行了论述. 相似文献
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绿色高分子材料的研究进展 总被引:1,自引:0,他引:1
分子材料从20世纪到今天,发展迅猛,在人们的日常生活中扮演着重要的角色,而其在环境上的影响日益受到人们的关注。介绍了绿色高分子材料研究概况,主要包括工艺的绿色化和绿色高分子材料的制备以及废弃高分子材料的回收利用。并对绿色高分子材料的发展进行了展望。 相似文献
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随着科学技术的发展,高分子材料在带给人类巨大效益的同时,也带来了严峻的环境问题。介绍了环境友好高分子材料的研究内容,即高分子的环境无害化合成和可降解高分子材料的制备以及废弃高分子材料的回收利用。展望了环境友好高分子材料的未来。 相似文献
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废弃高分子材料回收处理与再生利用新技术 总被引:8,自引:0,他引:8
评述了1998年6月在日本横滨举行的第14届国际聚合物加工年会,重点介绍了有关废弃高分子材料回收处理与再生利用的新技术,新动向。 相似文献
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本研究选择“C60的高分子化学修饰和功能材料化研究”为主题,采用金属有机化学反应技术,以碳负离子为重要的合成前体物质,在常温常压下较效地合成了可溶性C60化学修饰的高分子衍生物,并应用多种现代物理测试技术系统地研究了材料的结构物理化学性质及其功能化行为。 相似文献
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Launching the carbon fibre recycling industry 总被引:1,自引:0,他引:1
Vicki P. McConnell 《Reinforced Plastics》2010,54(2):33
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《Ceramics International》2023,49(20):32971-32978
Thermal interface materials (TIMs) with good thermal conductivity are paramount in mitigating the heat concentration challenges encountered during the operation of highly integrated components in sophisticated electronic devices. To optimize the comprehensive performance of TIMs, a balance must be struck: minimizing the filler concentration to attenuate materials hardness while maximizing filler content to bolster the thermal conduction pathway. Drawing inspiration from the orientation of tree branches passing through steppingstones in river, a method was proposed in this study. This method exploits the shear effect of carbon fiber (CF), owing to viscosity variances during diameter extrusion, and the differential flow velocity between CF and alumina to induce a significant degree of orientation. Combined with subsequent flipping and bonding, a TIM with vertically oriented CF was prepared. The TIM was obtained with a mere 12.1 wt% CF incorporation, the composite exhibits a through-plane thermal conductivity of 21.29 W/(m·K), representing an enhancement of two orders of magnitude relative to pristine silicone rubber, while retaining its flexibility and deformability. The orientation degree and high efficiency orientation effect of CF have been characterized via scanning electron microscopy (SEM), thermal conductivity test and light-emitting diode (LED) temperature rise test. 相似文献
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《Polymer》1987,28(10):1662-1666
The curing behaviour of thick laminates was simulated by curing thin polyester sections isothermally at various temperatures. Unsaturated polyesters with different ratios of styrene to unsaturations in the polyester were cured with benzoyl peroxide and subjected to hydrolytic degradation. The molecular size and structure of the carbon chain polymer was examined by size exclusion liquid chromatography and high resolution 13C FT n.m.r. analysis and was found to depend on the reaction temperature. The overall values of the molecular weights ranged from 12 000 to 36 000, which is a magnitude lower than those reported earlier. There was a similar tendency for molar ratios of styrene to unsaturations in the resin varying between 1.25 and 2.00. In the region 60°C–80°C the molecular weight increased with increasing temperature and then, from a maximum at 80°C–90°C, the molecular weight decreased with cure temperature. For the molar ratio of styrene to unsaturations of 2.25 the molecular weight decreased with increasing cure temperature. The average styrene sequence lengths were not found to deviate from the ratio expected from the stoichiometry in the resin before curing except for temperatures below 70°C and above 120°C. 相似文献
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关于高性能水泥的探讨 总被引:5,自引:3,他引:5
从混凝土的使用性能方面界定高性能水泥的含义,并且阐述了水泥高性能的主要途径,即优化熟料矿物组成,选择合理的粉磨工艺,采用非熟料的其它组分材料对水泥改性。 相似文献
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根据氯碱行业的现状和特点,简述了氯碱产业通过产业联合构建循环经济产业链的发展模式,并对部分氯碱企业发展循环经济产业模式进行了实证分析;建议氯碱企业利用区域和资源优势,实施差别化、规模化、精细化、绿色化的循环经济产业发展模式。 相似文献
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以普通硅酸盐水泥、快硬硫铝酸盐水泥、硅灰和膨胀剂为胶凝材料,再以石英砂为骨料制作灌浆砂浆,通过正交试验设计出高强胶凝材料的最佳配比。最后以上述胶凝材料为基础,粗中细三种砂子为骨料,并添加高性能外加剂,通过改变水和胶凝材料以及胶凝材料和骨料的比例,得到符合标准规范的高性能水泥基灌浆料。掺入快硬水泥有快硬早强的效果;为减小灌浆材料的收缩可以掺入适量膨胀剂;掺入硅灰可以提高灌浆材料的强度。综合考虑灌浆料的流动性,竖向膨胀率以及强度和收缩性的影响,确定灌浆料胶砂比为1.2,水胶比为0.34。研究成果对今后水泥基灌浆材料的发展具有一定的参考价值。 相似文献