The effects of hindered amine light stabilizers ( HALS), antioxidants on the radiation induced discoloration of polypropylene ( PP) and polyethylene ( PE) are studied. 结果表明五甲基HALS比相应的四甲基HALS更能有效地阻止聚烯烃的辐射致色。
The effect of HALS on anti-thermal ageing of polypropylene fabric was researched. 研究受阻胺光稳定剂对聚丙烯(PP)织物抗热老化性能的影响。
This artful photo befits its smaller subject, the Rijksmuseum, with its monumental collection of17th-century Dutch masters, including works by Rembrandt, Vermeer, and Frans Hals. 这幅巧妙的图片适合它的较小的主题,那国立博物馆,和它的纪念碑一起收藏了17世纪荷兰的主要的,包括伦布兰特,维梅尔和弗兰的作品。
In addition, Wang hals part-time Dating jobs, like tutoring a high school student, to bring in extra income. 但是大学生没把钱花在学习上,而是花在了谈恋爱上。
It is once considered that hindered amine light stabilizers ( HALS), which are widely used in polyolefins, are not suitable for PVC. 一般认为在聚烯烃中应用效果较好的受阻胺光稳定剂,不适用于PVC体系。
The Aesthetic Interest in the Public of Hals and Vermeer's Painting Art 论哈尔斯与维米尔绘画艺术的大众审美趣味
Progresses in Research and Development of HALS and Its Application in PVC HALS研发进展及其在PVC中的应用
The result shows that the hindered amines light stabilizer ( HALS) are most effective among the various light stabilizers, and the combination of ultraviolet absorbers ( UVA) and HALS can improved the film aging resistance. 结果表明:在各类光稳定剂中,受阻胺类光稳定剂的效果最好;紫外线吸收剂与受阻胺配合使用可使膜的耐老化性有所提高;
Effect of HALS on radiation discoloration of PE HALS对PE辐射致色的影响
The hindered amine light stabilizer ( HALS) was studied widely at home and abroad. The structure, manufacture, light stabilizing mechanism, application and development of HALS were emphatically discussed in this article. 国内外对受阻胺类光稳定剂(HALS)的应用研究十分活跃,本文重点论述了HALS的结构、制备、光稳定机理、应用和发展趋势。
The light stabilizing principle, structure, kinds, use requirement and development trend of hindered amine light stabilizer ( HALS) were discussed. 以目前广泛使用的受阻胺类光稳定剂(HALS)为出发点,论述了此类光稳定剂的结构、品种、光稳定机理、使用要求、发展趋势等。
Results Laparoscopic splenectomy was accomplished successfully in7 cases and a conversion to hand-assisted laparoscopic splenectomy ( HALS) was needed in1 case. 结果7例顺利完成腹腔镜脾切除术,1例改行手辅助腹腔镜脾切除术成功。
The role of HALS and antioxidants played in preventing PE from radiation-induced coloration is discussed. 并讨论了HALS和抗氧剂防止PE辐射致色的原因。
HALS ( Hindered Amine Light Stabilizer) is one of capture-agents for living radicals. It can be used in general materials such as plastic, rubber, film and coating. 受阻胺光稳定剂(HALS)是自由基捕获剂的一种,作为聚合物的添加剂,可以在塑料、橡胶、薄膜、涂料等高分子材料中起到光稳定化作用。
Clinical applications show that the hand-assisted device is better than that of other HALS with an excellent prospect. 该手助器充分结合了目前国内外临床上常用的各种手助器的优点,属新一代手助器。我们的临床运用经验表明,其临床应用前景良好。
The formation of alkyl free radical, carbonyl after irradiation is measured. 还测定了添加HALS的PE在辐照后烷基自由基、羰基的生成。
The ageing resistance function of plastics antioxidant and light stabilizer and related evaluation methods were expounded, especially, ageing resistance function of HALS was explained. When designing the formulation, consulting principles which were how to select antioxidant or light stabilizer were provided. 论述了塑料抗氧剂、光稳定剂的防老化基本功能及评价方法,特别介绍了受阻胺类光稳定剂的抗热氧老化功能,提出了设计配方时选用抗氧剂、光稳定剂的参考原则。
The present status and new developments in the study, production, consumption, as well as the varieties, properties and uses of hindered amine light stabilizers ( HALS) at home and abroad were systematically summarized, and the problems about domestic HALS were discussed. 系统地阐述了国内外受阻胺类光稳定剂(简称HALS)的研究、生产、消费现状及发展趋势。同时介绍了受阻胺类光稳定剂的主要品种、性能和用途。
Its mechanism, variety, synthesis process, production and consumption status at home and abroad are introduced in this paper. 介绍了HALS的作用机理、分类、合成工艺、国内外生产及消费情况。
Study on the stabilizing action of some polymeric hindered amine light stabilizer ( hals) for Polypropylene 某些高分子受阻胺对聚丙烯稳定化作用的研究
Mechanisms of the nitroxyl free radical forma-tion from the γ-ray irradiated HALSs were was discussed. 还讨论了HALS在γ射线辐照下生成氮氧自由基的机理。
Objective To explore the feasibility and significance of hand-assisted laparoscopic splenectomy ( HALS) for ruptured spleen. 目的探讨手助腹腔镜脾切除术治疗外伤性脾破裂的可行性及临床意义。
AIM: To explore the clinical feasibility and superiority of hand-assisted laparoscopic surgery ( HALS) technique through lap disc hand-assisted device and to extend the application range of HALS. 目的:探讨经蓝碟手辅助腹腔镜下外科技术在腹部外科疾病诊断、手术切除上的可行性和优越性,扩大经蓝碟手辅助腹腔镜下外科技术的适用范围。
Objective To study the application of hand-assisted laparoscopic surgery ( HALS) in colorectal carcinoma resection. 目的探讨采用手助腹腔镜(HALS)行大肠癌切除术的疗效。
The effects of some hindered amine light stabilizers ( HALS) and antioxidants on the radiation-induced coloration of polyethylene ( PE) are studied by measuring the yellowness index ( YI) of PE. 研究了受阻胺类光稳定剂(HALS)及各种抗氧剂对聚乙烯辐射致色的影响。
N-Substituted Alkoxyl HALS and its Application N-取代烷氧基受阻胺光稳定剂及其应用
It is found that all the HALS used are effective in preventing PE from radiation-induced discoloration. 发现各种HALS均能减少PE的辐射致色。
Concentration of nitroxyl free radicals formed from LMW HALS was usually higher than high molecular weight HALS. 小分子型受阻胺产生的氮氧自由基浓度一般比高分子型受阻胺产生的氮氧自由基浓度高。
On this basis, to explore the various performance of HALS and UV absorber in PP, screening the best effect of compound. 在此基础上,探索筛选的受阻胺类光稳定剂与紫外线吸收剂复配对PP性能的影响,探讨各类抗老化剂含量与改性PP能的关系,筛选效果最佳的复配配方。
Triacetonamine appears great application prospect as intermediates of Hindered amine light stabilizer ( HALS). 三丙酮胺作为受阻胺类光稳定剂的重要中间体具有很大的应用前景。