工程塑料改性及成型加工技术特集之五聚酯的改性及应用

讨论了PBT融合聚合物改性技术和混配技术，介绍了具有新特性牌号用途的开发。采用新技术使GF—PET的成型性大幅度地改进，其用途的开发也在着实地进行。     

工程塑料改性及成型加工技术特集之六液晶聚合物改性及应用

就利用液晶聚合物特性的新材料开发，对高循环成型材料和流动性和机械物性同时改性的填料应用、耐热新规格聚合物的骨架、精密成型材料及其回收再生适应性作了说明。     

工程塑料改性及成型加工技术特集之四m-PPE的改性技术及应用

利用改性聚苯醚的尺寸稳定性。耐热性，难燃性及密度低的特性。在广泛领域使用，在此，论述采用阻燃剂，填料，合金等改性聚苯醚的改性技术。     

特种工程塑料PES、PEEK的成型加工特性

叙述了特种工程塑料的界定,详细叙述了特种工程塑料PES、PEEK的物理性能和优异耐热性,介绍了PES、PEEK在我国的应用开发研究、应用领域和一些典型的制品。着重论述了特种工程塑料PES、PEEK的加工特性和制品成型方法,对加工设备和加工工艺做了详细的论述,为PES、PEEK的成型加工提供了理论基础和经验指导。     

工程塑料改性及成型加工技术特集之七聚苯硫醚的改性及应用

本文阐述聚苯硫醚近年开发动向,包括低溢料、刚性化、精密成型性、高滑动性等,并以大日本油墨化学公司最近新开发的牌号具体说明.     

工程塑料改性及成型加工技术特集之九聚酰亚胺的改性及应用

本文介绍具有目前Tg最高达250℃的聚酰亚胺AURUM的特性、地位、材料开发和用途开发,特别是利用其Tg高的特性,不断进入机械部件、滑动部件、半导体部件领域的应用.     

工程塑料改性及成型加工技术特集之二 聚甲醛的改性

采用革新的聚合技术和最适宜的材料组成的聚甲醛 ,比之以往的聚甲醛 ,其蠕变性能大幅地提高。介绍了具有此优异特性的新牌号树脂 ,讨论了对蠕变特性的看法和改性方法     

工程塑料改性及成型加工技术特集之三聚碳酸酯高功能化

聚碳酸酯最新的改性有 :(1 )对透明性的 PC赋予新的机能 ;(2 ) PC合金化的高性能 /高功能化及新 PC合金化 ;(3 )适应环境的新难燃 PC材料     

高性能工程塑料聚醚醚酮特性和应用的研究

针对机械、化工等领域的典型易损易蚀件,研究开发出4种填充增强改性热塑性工程塑料聚醚醚酮（PEEK）,通过对这些材料的物理、力学和摩擦学性能的试验评价,表明其具有高强度、低摩擦系数和高耐磨性能等特性,并且将PEEK－4、PEEK－2和PEEK－1等几种配方材料成功地应用于气体压缩机阀片和发电机组高温动密封环以及耐腐蚀阀门动密封环。     

国内C9石油树脂的改性及综合利用研究进展

C9石油树脂是石化工业副产物的不饱和C9馏份进行聚合而成的功能性树脂,常温下为玻璃态热塑性固体。文章综述了国内外C9石油树脂在塑料、橡胶、涂料、粘合剂、油墨、油漆、油田化学品以及各种化工助剂领域的应用进展,旨在为综合利用C9石油树脂、提高其附加价值提供依据。     

Solid-Phase Protein Modifications: Towards Precision Protein Hybrids for Biological Applications

Proteins have attracted increasing attention as biopharmaceutics and diagnostics due to their high specificity, biocompatibility, and biodegradability. The biopharmaceutical sector in particular is experiencing rapid growth, which has led to an increase in the production and sale of protein drugs and diagnostics over the last two decades. Since the first-generation biopharmaceutics dominated by native proteins, both recombinant and chemical technologies have evolved and transformed the outlook of this rapidly developing field. This review article presents updates on the fabrication of covalent and supramolecular fusion hybrids, as well as protein-polymer hybrids using solid-phase approaches that hold great promise for preparing protein hybrids with precise control at the macromolecular level to incorporate additional features. In addition, the applications of the resultant protein hybrids in medicine and diagnostics are highlighted where possible.     

有机颜料商品化及表面改性(修饰)技术

本文讨论了有机颜料商品化剂型的重要特性,颜料的表面改性(修饰)技术的基本原理,主要改性工艺技术的类型,诸如以经典表面活性剂改性(阴离子、阳离子、两性及非离子表面活性剂,松香酸、松香胺及有机烷胺等);颜料衍生物改性技术,(添加方式及处理过程中生成);研磨,溶剂处理及酸溶与酸胀;聚合物处理(制备物,高分子分散剂与包膜技术)及以无机化合物实施改性(包核、表面键合及低温离子溅射)。并对偶氮、酞菁及杂环三大类别主要颜料品种的商品化与改性实例进行了介绍。     

Studying Reversible Protein Post-translational Modification through Co-translational Modification

Understanding the post-translational modifications of targeted proteins is of great significance for manipulating the physiological processes of eukaryotes. Chemical biology tools have been used to investigate the biological roles of those post-translational modifications at particular sites, especially genetic code expansion technology, which can also be combined with the concept of synthetic biology to generate a genetically modified organism with a synthetic auxotroph for co-translational modification components. In this concept, we will introduce applications, limitations, and perspectives of genetic code expansion technology for studying post-translational modification based on recent progresses. Future perspectives of genetically modified organisms also will be discussed in regard to the application of post-translational modification research.     

Rolltruded Poly(Aryl Ether Ether Ketone) (PEEK) for Membrane Applications

Abstract

An investigation of the transport and separation of several permanent gases (CO₂, N₂, CH₄, and H₂) and vapors (H₂O and ethanol) in unprocessed and rolltruded poly(aryl ether ether ketone) (PEEK) thin films has been conducted to evaluate PEEK for membrane applications requiring thermally and chemically stable materials. Transport coefficients and separation factors have been determined at permeation temperatures ranging from 40 to ca. 180°C. The gas transport coefficients were found to increase by up to 30% depending on the processing conditions. Actual separation factors, determined for a CO₂/N₂ gas mixture (24.6 vol% CO₂), were depressed slightly in comparison to the ideal values obtained from pure component data. In contrast, water and ethanol vapor permeabilities declined between 10 and 15% as a result of processing. For a 39.1 wt% vapor mixture of H₂O in EtOH, ideal and actual separation factors, determined at 130°C, were in good agreement. In contrast, order of magnitude improvements in the actual versus ideal separation factors were found for 11.7 and 7.6 wt% mixtures of H₂O in EtOH in both unprocessed and rolltruded PEEK. A comparison with other membranes considered for high temperature vapor dehydrations suggests that PEEK may be an excellent polymer for these applications.     

Synthesis, mechanical properties and chemical/solvent resistance of crosslinked poly(aryl-ether-ether-ketones) at high temperatures

A synthetic two-stage procedure was developed for the synthesis of moderately crosslinked polymers based on poly(aryl-ether-ether-ketone) (PEEK). Rigid crosslinks based on aromatic imines were synthetically introduced into PEEK polymer matrix resulting in PEEK materials with various degrees of crosslinking. Two specific crosslinked PEEK polymers (5% and 10% of ketone groups crosslinked) were characterized and studied in detail. Thermomechanical properties, as well as chemical/solvent resistance of these materials at high temperatures (175-280 °C) were investigated and compared to the original PEEK material (Victrex 151G). The introduction of rigid crosslinks was shown to disrupt crystallinity of PEEK very efficiently. Because tensile properties of PEEK depend on its crystallinity, we observed a decrease in properties such as Young's modulus and the ultimate elongation, the extent of which depended on the degree of crosslinking. We also observed an improvement in the elastomeric properties of the crosslinked materials, such as decrease in initial permanent set during high temperature cyclic tensile testing. Mechanical creep behavior at high temperature also improved for crosslinked polymers vs the original commercial Victrex 151G in terms of a reduced irreversible creep component. All crosslinked materials showed excellent resistance to hot oily, acidic and basic environments, as well as excellent thermal stability. Overall, we were able to synthesize “softer” materials that are more rubbery at high temperature than commercial thermoplastic Victrex 151G; these elastomer-like materials showed promising mechanical properties for high temperature applications in hot/corrosive environments.     

Chemical modifications of lignocellulosic materials and their application for removal of cations and anions from aqueous solutions

This review discussed the last 10 years progress in the use of lignocellulosic materials chemically modified as low‐cost biosorbents. Thus, the chemical modifications, such as chemical pretreatment, oxidation, as well as the grafting of carboxyl groups, amines, amides, etc., on lignocellulosic fibers, that aim to increase the number of adsorption sites and maximize toxic metal ion adsorption capacity have been addressed. The literature presents results that indicated performances of biosorbents equal to or even higher than conventional methods and adsorbents. Many efforts have been concentrated on the improvements of these biosorbents through chemical modifications. However, some difficulties still exist, including the discharge of colored organic compounds resulting from the pretreatments and the development of fast, clean, and low‐cost synthesis of selective and multifunctional adsorbents. Thus, the challenge for future research is to find solutions to these difficulties in order to finally make lignocellulosics biosorbents that can replace conventional adsorbent materials. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 43286.