家电专用ABS耐候白色母的研制

研究了ABS色母中钛白粉、抗氧剂、光稳定剂、调白颜料对ABS耐候性能的影响。结果表明,金红石钛白粉、抗氧剂和光稳定剂能够提高ABS的耐候性能。通过优化配方,研制出一种UV–B老化168 h,色差6.0的家电专用ABS耐候白色母,其中钛白粉、光稳定剂、抗氧剂、调白颜料的质量分数分别为30%,30%,5%,0.01%。     

塑料工业用光稳定剂发展近况

介绍了光稳定剂在塑料中的作用,着重讨论了受阻胺光稳定剂与苯并三唑UV吸收剂的作用机理及其并用时的协同效应。以聚苯乙烯和ABS为例,比较了不使用光稳定剂、单独使用一种光稳定剂以及受阻胺与苯并三唑并用时的耐候性变化。结果表明,对聚苯乙烯,并用使光稳定效果提高30多倍;对ABS,并用使抗冲强度保留时间延长20倍。此外,还介绍了其他类型光稳定剂的一些较有意义的发展动向。     

受阻胺光稳定剂770的合成与应用研究

采用不同的原料和工艺方法合成了受阻胺光稳定剂770 ZZ,研究了催化剂种类、溶剂种类以及原料配比等对转化率的影响,并采用傅里叶红外光谱(FTIR)、热重分析仪(TGA)、差示扫描量热仪(DSC)和核磁氢谱(~1H-NMR)对产物进行了表征,最后将其应用于制备耐候ABS。确定了光稳定剂770 ZZ的合成工艺条件,FTIR和~1H-NMR表明获得了目标产物。TGA和DSC分析显示,通过后处理工艺可以有效去除产品中的催化剂等杂质,提高产品的纯度,能有效提高ABS的抗紫外性能。     

丙烯腈-苯乙烯-丙烯酸酯耐候性能的研究

研究ASA在PV3929氙灯老化测试条件下的耐候性能,对ASA的典型光老化现象进行详细阐述。ASA树脂的耐候性能优于AES树脂。ASA耐候失效的原因在于产生大量的酮类物质,形成酸导致丙烯腈降解,老化产物富集在表面造成光泽度严重损失,并导致灰度小于4;提升耐候性能的关键在于优选ASA高胶粉并复配不同分子量的受阻胺光稳定剂。     

受阻胺光稳定剂在PVC中的作用与应用

论述了塑料光稳定剂对PVC的防老化作用、功能,强调耐候PVC制品中必须加入光稳定剂,并特别介绍了受阻胺光稳定剂的抗热氧老化功能和在PVC中的应用。     

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     

受阻胺光稳定剂对PP织物抗热老化性能的影响

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。受阻胺光稳定剂不仅具有优异的光稳定作用,还具有良好的热稳定作用,对PP织物的长期抗热老化作用显著;当酚类抗氧剂与受阻胺光稳定剂以1∶3的比例组合使用时,达到最佳的配合效果。     

ABS塑料的防老化技术

本文综述了ABS塑料的防老化稳定剂,对于ABS树脂的氧化稳定体系首选抗氧剂245和TNPP1076,DLTP,对于其户外使用的稳定体系,并用苯并三唑光稳定剂和受阻胺光稳定剂（HALS）是必需的,同时不应添加其他助剂。     

不同受阻胺光稳定剂改性聚丙烯耐光老化性能研究

分析了4种受阻胺光稳定剂在聚丙烯(PP)加工过程中的热稳定性,并研究其单一和复合使用对PP其光稳定性能和力学性能的影响。以失重率为10%时的热分解温度衡量受阻胺光稳定剂的热稳定性,结果表明,受阻胺光稳定剂的加入,使PP的光稳定性能增强;高低分子量受阻胺复合使用,可降低PP的黄变因数和羰基指数,增加其拉伸强度及冲击强度保持率;GW622、GW944和Tinuvin144复合使用效果最佳。     

光稳定剂应用在聚碳酸酯之探讨

分别添加了5种不同的苯并三唑类紫外光吸收剂和受阻胺光稳定剂在聚碳酸酯(PC)树脂中,利用耐候试验机、万能试验机、色差仪和高效液相色谱(HPLC)来探讨它们对聚碳酸酯的保护作用以及对紫外光的阻隔效果。结果表明,添加上述光稳定剂能明显改善PC在耐候测试中产生的黄变现象和物性下降等问题。     

各类稳定剂对聚乙烯薄膜光氧老化的稳定作用

研究了不同光稳定剂和抗氧剂及其配合使用、光稳定剂含量对聚乙烯薄膜耐光氧老化性的影响。结果表明：在各类光稳定剂中、受阻胺类稳定剂的效果最好;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;各类抗氧剂对聚乙烯膜的耐光氧老化性没有不利影响;光稳定剂含量增加,薄膜耐老化寿命提高。     

耐候性聚氨酯用稳定剂

介绍了聚氨酯的稳定化机理,综述了用于聚氨酯的紫外线吸收剂、抗氧剂、光稳定剂的一些品种。讨论了紫外线吸收剂(UV-571、UV-328)、抗氧剂(Irganox 1010、Irganox 1135、Irganox3125),受阻胺(HALS)(UV-770、UV-765)等稳定剂对聚氨酯光氧老化的影响,结果表明,同时使用上述3类稳定剂可得到较好的效果。     

Study of natural aging of industrial low density polyethylene by X-ray photoelectron spectroscopy

Abstract

X-ray photoelectron spectroscopy (XPS) was used to study the natural outside aging of industrial low density polyethylene (LDPE) under the influence of one year round weather. Two types of LDPE were studied. The first type was LDPE without additives and the second type was doped with 4% of hindered amine light stabilisers (HALS). Unstabilised and 4% HALS stabilised LDPE samples underwent an oxidation of the polymeric matrix, by the production of C–O, C=O and O=C–O groups. These chemical functions were observed in high resolution XPS spectra around C1s and O1s peaks. From these results, it was then possible to propose mechanisms of natural aging of LDPE in such conditions. On the other hand, there is no clear evidence that HALS could be effective in natural aging for the polymer surfaces with exposure to the elements.     

受阻胺光稳定剂(HALS)在聚合物材料上的应用

介绍了受阻胺光稳定剂(HALS)的稳定机理.讨论了其他稳定剂对其光稳定效果的影响.实验表明:HALS单独使用耐候性不佳,与其他稳定剂复配使用可得较好的结果.此外,一些HALS还能改善聚合物材料的阻燃性能.     

光稳定剂对热塑性聚氨酯胶粘剂性能的影响

采用一步法合成耐黄变热塑性聚氨酯(TPU)胶粘剂,研究了紫外线吸收剂UV-329、受阻胺光稳定剂UV-622、抗氧剂Chinox1010等对TPU胶粘剂性能的影响。结果表明,当UV-329、UV-622、Chinox1010质量比为3∶3∶2,且复合光稳定剂添加质量分数1.6%时,可提高TPU胶粘剂的耐黄变性能,有效延缓TPU胶粘剂的光老化速度。     

阻燃ABS的配方及工艺研究

研究采用双螺杆挤出机生产阻燃ABS的配方及工艺,并分析了各种阻燃剂在阻燃ABS中的阻燃效果;讨论了各种阻燃剂和抗紫外线剂对阻燃ABS耐候性的影响和提高阻燃ABS耐候性的方法;同时研究了改性剂对阻燃ABS性能的影响     

ABS/BaSO4体系老化性能的研究

利用自然曝露和热烘箱老化实验，通过考察老化过程中力学性能及红外光谱中Ｃ＝Ｃ双键吸收峰强度的变化，研究了ＡＢＣ／ＳａＳＯ４体系的老化性能及硬脂酸、钛酸酯偶联剂、稀土偶联剂等处理剂对该体系老化性能的影响。加入ＢａＳＯ４可提高ＡＢＳ的耐老化性能；硬脂酝 及稀土偶联剂对填充体系光氧老化有微弱的促进作用，而对热氧老化过程无明显影响；钛酸酯偶联剂对体系的光氧、热氧老化过程均有加速作用，能降低绵耐老化性能。     

Synergistic effect of hindered amine light stabilizers/ultraviolet absorbers on the plasticized PVC during photo-irradiation

Two kinds of piperidine derivatives including a low-molecular weight (Wt. 481, T770) and a high-molecular weight (Wt. 2000–3100, C944) hindered amine light stabilizers (HALS) are added singly or with ultraviolet absorbers (UVA) in combination to plasticized poly(vinyl chloride) (PVC) samples. Digital photos, color changes, attenuated total refection-Fourier transform infrared spectra (ATR-FTIR), and mechanical properties are obtained to investigate the photostable effect of the light stabilizers on the plasticized PVC after artificial aging. PVC samples with HALS perform well at the first 400 h of irradiation in color change, FTIR, and mechanical properties, but at the last 400 h the photostability decreases. Besides, C944 performs better than T770, because C944 is a high-molecular weight UV stabilizer and has good extraction resistance. Plasticized PVC samples with UVA resist discoloring and photooxidation from the photo-irradiation. Excellent synergism is observed between the combination of HALS and UVA. PVC with HALS/UVA performs better than PVC with HALS and PVC with UVA in color differences, FTIR, and mechanical properties. The synergism is due to the different stages of functions between HALS and UVA. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

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。     

Online monitoring of the influence of the chemical structure of hindered amines on the hydrolysis of polycarbonate in a polycarbonate/poly(acrylonitrile–butadiene–styrene) blend by ultraviolet–visible spectroscopy

Without stabilization, polycarbonate (PC)/poly(acrylonitrile–butadiene–styrene) (ABS) blends are susceptible to a loss of mechanical properties after a few days of exposure to weathering conditions. ABS can be stabilized against terrestrial light by the use of hindered amines in combination with a UV absorber; such hindered amines cannot be used when PC is present in the polymer blend. The hydrolysis of PC is accelerated when a small amount of a hindered amine light stabilizer (HALS) is incorporated into the resin and is exposed to elevated temperatures. In this study, three different HALSs (Tinuvin 123, Tinuvin 770, and Tinuvin 765, Ciba, Basel, Switzerland) were used as UV stabilizers for PC/ABS blends, and their effects on the PC phase were observed with online ultraviolet–visible spectroscopy on extruded flat films. These stabilizers were compounded with the blends in a corotating twin‐screw extruder at 240°C. The molecular weight of the compounded samples was determined by gel permeation chromatography. The extent of degradation induced by the HALSs on the PC phase was found to be a function of its chemical structure. Tinuvin 123 with an amino ether functional group enhanced degradation in comparison with Tinuvin 770 and Tinuvin 765. Tinuvin 770, a secondary amine, was apt to be more reactive than Tinuvin 765, a tertiary amine, because less steric hindrance was experienced by the former. Accelerated aging of the compounded samples was performed. Decreased degradation was observed for the samples containing hindered amines; however, the HALSs alone were not effective in protecting the PC/ABS blends against harmful UV light. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011