国外有关塑料助剂研究的期刊文摘（光稳定剂）

氢键型紫外光吸收剂与受阻胺光稳定剂之间的协同效应；苯甲酸酯型紫外光吸收剂与受阻胺光稳定剂之间的相互作用；聚丙烯中N-烷氧基受阻胺光稳定剂对澳化阻燃剂分解的影响；含有单偶氮颜料的全同聚丙烯的光稳定性；用X-射线光电子能谱方法研究低密度聚乙烯工业品的自然老化；     

受阻胺对塑料的光稳定作用

通过受阻胺、二苯甲酮、苯并三唑及镍螯合物对聚乙烯、聚丙烯及苯乙烯聚合物等的紫外光稳定作用的比较,说明受阻胺是一种高效光稳定剂,当与上述光稳定剂合用时,能收到协同加强效果。对我国研制的受阻胺稳定剂作了介绍。     

Poly(AN-co-PMPA)的合成及其对POM耐光氧老化性能的影响

采用乳液聚合方式将一种聚合型的受阻胺光稳定剂4-丙烯酰氧基-1,2,2,6,6-五甲基哌啶(PMPA)与丙烯腈(AN)进行共聚,制备出一种含有受阻胺光稳定基团的聚丙烯腈共聚物——丙烯腈-4-丙烯酰氧基-1,2,2,6,6-五甲基哌啶醇共聚物[Poly(AN-co-PMPA)],并用该聚合物对聚甲醛(POM)进行共混改性。结果表明,Poly(AN-co-PMPA)可以改善POM的紫外光稳定性,而且其长期耐老化性能优于小分子光稳定剂对POM的改性。此外,Poly(AN-co-PMPA)在一定程度上可以提高聚POM的抗冲性能。     

国外有关塑料助剂研究的期刊文摘（光稳定剂）

含有光稳定剂的紫外光固化光学树脂的光稳定与固化动力学;EPDM中的高分子型受阻胺光稳定剂（HALS）的合成、表征和性能评价;高分子添加剂中协同体系的紫外光谱研究;基于端基功能化聚丙烯的受阻胺光稳定剂的合成与表征;硝基氧受阻胺光稳定剂与苯酚的相互作用     

受阻胺光稳定剂和抗氧剂并用对聚合物紫外光稳定性的影响

阐述了受阻胺稳定剂(HALS)和抗氧剂的分类和作用机理,重点介绍了受阻胺类光稳定剂和抗氧剂并用对聚合物紫外光降解中的影响。当受阻胺类光稳定剂和抗氧剂并用时,既有协同效应,又有对抗效应,也有加和效应。这依赖于受阻胺类光稳定剂和抗氧剂的种类。同时介绍受阻胺光稳定剂发展的趋势。     

受阻胺光稳定剂对PVC的光稳定作用

传统上,聚氯乙烯（ＰＶＣ）防光老化主要用于二苯甲酮类光稳定体系,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,将受阻胺光稳定剂试用于ＰＶＣ薄膜,结果表明,该光稳定剂用于ＰＶＣ中,其光,热稳定效果与二苯甲酮类紫外光稳定剂相近,为使ＰＶＣ具有防尘功能的丙烯酸酯类聚合物表面涂层,对ＰＶＣ的紫外光稳定有益。     

高韧耐候改性聚甲醛性能研究

将热塑性聚氨酯(TPU)、抗氧剂、紫外光吸收剂、光稳定剂、甲醛吸收剂、润滑剂、晶核剂等助剂与聚甲醛(POM)进行共混制备了高韧耐候改性POM,分析了紫外光老化实验后POM的力学性能变化、光稳定性以及色差等.研究表明,经1000 h紫外光老化后,高韧耐候改性POM的力学性能、光稳定性及色差得到明显改善.其中拉伸强度、弯曲...     

塑料稳定剂在玻璃纤维增强不饱和聚酯树脂中的应用

综述了塑料稳定剂(包括紫外线吸收剂、受阻胺光稳定剂和抗氧剂等)在不饱和聚酯玻璃纤维增强塑料(GFRP)上的应用研究情况。一些研究结果表明:只使用单一的稳定剂效果不佳,必须配合使用稳定剂,才能取得较好的防老化效果。     

HALS研发进展及其在PVC中的应用

介绍了近年来受阻胺类光稳定剂(HALS)新产品的研究开发情况,高分子量化受阻胺、多功能化受阻胺、低碱性化受阻胺和反应型受阻胺等不断出现;应用研究取得新进展,对PVC体系中有较好稳定的作用。     

聚烯烃用抗氧剂及光稳定剂的研究进展

综述了国际大型公司和国内研究机构新近出品的抗氧剂、光稳定剂。对效率高的酚类抗氧剂进行了重点介绍。受阻胺类光稳定仍是光稳定剂的主流,已开发出适用于食品包装材料及环保型的光稳定剂。各种研究机构正在不断研究新型结构的稳定剂,通过高相对分子质量化、复配等技术,制备出高效、环保、多功能化的稳定剂。     

A study on the photostabilizer additives on the textile fiber reinforced polymer composites: Mechanical,thermal, and physical analysis

The effect of photostabilizers on the mechanical, thermal, and physical properties of textile fiber reinforced polymer (T‐FRP) composites was investigated. In the first phase of this study, the effect of different concentrations of ultra violet absorber (UVA), hindered amine light stabilizers (HALS) and antioxidants (AOs) into T‐FRP composites for unweathering condition are examined. Mechanical tests were performed as well as differential scanning calorimetry (DSC) analysis for thermal properties. According to test results, there is no significant effect of photostabilizers on the mechanical and thermal properties of the T‐FRP composites. In the second phase of the study, the influence of the photostabilizers on the durability performance of T‐FRP composites is focused under the accelerated UV weathering condition by the help of tensile testing, thermal analysis, and color measurements. According to test results, only about 5% loss in mechanical properties (25% loss for composites without additives) can be observed after 240 h of UV weathering with HALS and UVA addition at adequate concentrations. In addition, AOs can be considered as a strong stabilizer on physical properties with lower color change values. This work shows that the efficiency of the photostabilizers is highly dependent on the type, concentration, and weathering time. POLYM. ENG. SCI., 58:1082–1090, 2018. © 2017 Society of Plastics Engineers     

Synthesis of novel multifunctional photostabilizers containing UVA and HALS moieties and their effects on polymers and dyes

Ultraviolet absorbers and hindered amine light stabilizers are two kinds of efficient photostabilizers, which have different mechanisms. It is possible to make a synergistic interaction if introducing these two types of photostabilizing fragments into one molecule. In this article, two novel multifunctional photostabilizers UVH‐1 and UVH‐2 containing UVA and HALS fragments were synthesized from a 2‐hydroxyphenylbenzotriazole compound (UV‐P). UVH‐1 was synthesized by a three‐step synthetic strategy via esterification, bromination, and amination. UVH‐2 was facilely synthesized by a one‐step three‐component Mannich reaction. The chemical structure of UVH‐1 and UVH‐2 were confirmed by Fourier‐transform infrared (FTIR), ¹H NMR, ¹³C NMR, and mass spectrometry. Both multifunctional photostabilizers UVH‐1 and UVH‐2 show good ultraviolet absorption performance and excellent light stabilizing effect when applied to photoprotection of dye, polyacrylonitrile, and polyurethane in the solution state, in which UVH‐1 shows better light stabilization performance even on polymers. It can be concluded that a combination of the HALS and UVA active groups can enhance the photoprotective effect on dyes and polymers and also increase the molecular weight of the additive to overcome escape of the photostabilizer from the polymer matrix. J. VINYL ADDIT. TECHNOL., 26:259–267, 2020. © 2019 Society of Plastics Engineers     

聚甲醛的光稳定化研究

采用了二苯甲酮类和苯并三唑类紫外线吸收剂(UVA)、位阻胺类光稳定剂(HALS)以及光屏蔽剂对聚甲醛进行光稳定化改性,对比了改性前后聚甲醛光降解后的物理力学性能及表面层分子量保持率。结果表明,0 5%的UVA可以显著提高POM的耐紫外光性能,苯并三唑类效果优于二苯甲酮类UVA。在酚类抗氧剂存在下,低含量的HALS(<0 25%)对聚甲醛没有光稳定化作用。     

The role of hindered piperidine (HALS) compounds for the stabilization of polypropylene against oxidation reactions caused by ozone and oxidative products formed during photolysis of ozone

The role of hindered piperidine (HALS) photostabilizers for the photostabilization of polypropylene films against oxidative reactions caused by ozone and oxidative species formed during photolysis of ozone under UV irradiation (i.e., atomic oxygen and singlet oxygen) has been investigated and discussed. It has been found that ozonization and/or photoozonization of 2,2,6,6-tetramethyl-piperidine (I) and piperidinoxy radical (2,2,6,6-tetramethylpiperidino-1-oxy) (II) gives a high yield (91–98%) 2,6-dimethyl-2-hydroxy-6-nitro-heptane. Ozonization and/or photoozonization of HALS probably occur by a similar mechanism as reported for (I) and (II). HALS photostabilizer reacts with ozone and/or photolysis products of ozone (atomic oxygen and/or singlet oxygen) and loses its function in the photostabilization process. For that reason protection of polypropylene against photooxidative degradation and photoozonization is of great commercial importance.     

聚甲醛、PET及PVC的抗老化配方研究进展

综述了聚甲醛(POM)、PET、PVC及其改性材料的抗老化研究的新进展。POM、PET及PVC/ABS的抗老化配方采用抗氧剂/紫外线吸收剂复配体系,而PVC及其他改性材料则采用紫外线吸收剂体系,若再加入适量的受阻胺光稳定剂,可以改善材料的抗老化效果。     

受阻胺类光稳定剂的发展

详细介绍了受阻胺类光稳定剂（HALS）的作用机理及国内外发展现状，指出应向高分子量化发展，开发低碱性HALS及反应键合型HALS。     

耐药型受阻胺光稳定剂的发展

介绍了耐药型受阻胺光稳定剂（HALS）的发展。针对低pKa值HALS,含缚酸剂的HALS,以及N-烷基化和N-烷氧基化HALS,详细叙述了典型品种的性能特点,并报道了耐药型受阻胺光稳定剂的最新研究成果。     

聚甲醛基增韧改性材料研究进展

聚甲醛(POM)共混增韧是高分子学术界迄今未能很好解决的一个世界性难题,从弹性体增韧、刚性粒子增韧、合金化改性增韧等方面综述了国内外POM增韧改性的最新研究进展,同时对今后POM增韧改性的方向提出了建议。     

Characterization of Fluorescent Proteins with Intramolecular Photostabilization**

Genetically encodable fluorescent proteins have revolutionized biological imaging in vivo and in vitro. Despite their importance, their photophysical properties, i. e., brightness, count-rate and photostability, are relatively poor compared to synthetic organic fluorophores or quantum dots. Intramolecular photostabilizers were recently rediscovered as an effective approach to improve photophysical properties of organic fluorophores. Here, direct conjugation of triplet-state quenchers or redox-active substances creates high local concentrations of photostabilizer around the fluorophore. In this paper, we screen for effects of covalently linked photostabilizers on fluorescent proteins. We produced a double cysteine mutant (A206C/L221C) of α-GFP for attachment of photostabilizer-maleimides on the β-barrel near the chromophore. Whereas labelling with photostabilizers such as trolox, a nitrophenyl group, and cyclooctatetraene, which are often used for organic fluorophores, had no effect on α-GFP-photostability, a substantial increase of photostability was found upon conjugation to azobenzene. Although the mechanism of the photostabilizing effects remains to be elucidated, we speculate that the higher triplet-energy of azobenzene might be crucial for triplet-quenching of fluorophores in the blue spectral range. Our study paves the way for the development of fluorescent proteins with photostabilizers in the protein barrel by methods such as unnatural amino acid incorporation.     

受阻胺光稳定剂的生产与研究进展

介绍了国内外受阻胺光稳定剂（HALS）的生产状况,包括HALS的主要系列、品种、产量和需求情况。阐述了HALS的研究现状与发展趋势,指出该领域正向高相对分子质量化、多功能化、低碱化反应性方向发展,并提出了国内HALS产业发展的一些建议。