Teflon－AF~R──新一代的电子和光电功能聚合物材料

ＴｅｆｌｏｎＡＦ是新一代高性能的Ｔｅｆｌｏｎ氟碳树脂。完全非晶态的ＴｅｆｌｏｎＡＦ具有许多突出优点，如在１９０ｎｍ厚度内的完全透明度，低折射率（１．２９～１．３１）；突出的介电性能（在塑料家族中具有最低的介电常数）；良好的力学性能；宽温区的热性能和优良的化学惰性及在选定的全氟化溶剂内受限制的溶解性等等。ＴｅｆｌｏｎＡＦ在高科技领域中具有广泛的应用前景。如用作在光纤和集成光学方面的重要材料，半导体和工艺材料，介电和释放材料，特殊性能的化学和工业材料以及生物医学材料等。     

静电粉末喷涂用聚三氟氯乙烯

综述了静电粉末喷涂用聚三氟氧乙烯的性能、合成方法及市场价值。从引发剂、乳化剂、pH缓冲剂等方面，详尽讨论了静电粉末喷涂用聚三氟氯乙烯的研究进展，总结了国内聚三氟氯乙烯存在的问题并提出了解决办法。     

含氟聚合物的合成概述

概述了无定型含氟树脂、可熔性聚四氟乙烯（PFA）、热塑性氟塑料THV、聚偏氟乙烯（PVDF）等含氟聚合物新品种的性能和合成方法。     

Interphases in the Adhesive Bonding of Fluoropolymers

Strong and durable adhesive bonds may be made between polytetrafluoroethylene (PTFE) and either cyanoacrylate (CA) or epoxy adhesives, if the PTFE surface is modified by the use of a “primer” such as triphenylphosphine (TPP) or diaminodiphenylmethane (DDM). The primer mixes with the PTFE surface, and the modified surface is then capable of forming an interphase, tens to hundreds of nanometers thick, where interpenetration of the adhesive and adherend occurs. Using CA adhesives, PTFE/CA/PTFE block compression shear bond strength (ASTM D4501-85) of over 10 MPa can be achieved, with failure occurring cohesively. Initial work with epoxy adhesives indicates that the use of DDM primer gives adhesive bonds comparable in strength with those produced by modification of the fluoropolymer surface by sodium naphthalenide.     

3‐D Printing and Development of Fluoropolymer Based Reactive Inks

Engineering reactive materials is an ever present goal in the energetics community. The desire is to have energetics configured in such a manner that performance is tailored and energy delivery can be targeted. Additive manufacturing (3‐D printing) is one area that could significantly improve our capabilities in this area, if adequate formulations are developed. In this paper, fluoropolymer based reactive inks are developed with micron (mAl) and nanoscale aluminum (nAl) serving, as the fuel at high solids loading (up to 67 wt%) and their viscosity required for 3‐D printing is detailed. For the pen‐type technique and valves used in this work, it is required to have viscosities on the order of 10⁴–10⁵ cP. For printed traces with apparent diameters under <500 μm, the combustion velocities for both micron and nano scale aluminum formulations, are approximately identical: 30 ± 3 versus 32 ± 2 mm s^?1, respectively. Further increasing the apparent diameter is shown to increase the combustion velocity in the case of the nanoscale aluminum formulation by four‐fold over that of the micron scale aluminum formulation, but it plateaus as it approaches an apparent diameter of 2 mm. The results suggest with proper architecture that tailorable combustion rates and energy delivery are feasible.

     

氟聚合物溶液对TATB的润湿效果研究

用ＴＹ－８２接触角测定仪,测定了几种氟聚合物溶液与三氨基三硝基苯（ＴＡＴＢ）药片的接触角。结果表明：偏二氟乙烯与六氟丙烯的共聚物Ｆ２６０２,Ｆ２６０３溶液对ＴＡＴＢ接触角较小;偏二氟乙烯与三氟氯乙烯的共聚物Ｆ２３１４溶液浓度为８％时,由于批准不同,润湿效果不同,随着浓度的降低,接触角变小;乙酸丁酯作溶剂时,Ｆ２３１４溶液对ＴＡＴＢ表面具有较好的润湿作用。     

Polymer brush coatings for combating marine biofouling

A variety of functional polymer brushes and coatings have been developed for combating marine biofouling and biocorrosion with much less environmental impact than traditional biocides. This review summarizes recent developments in marine antifouling polymer brushes and coatings that are tethered to material surfaces and do not actively release biocides. Polymer brush coatings have been designed to inhibit molecular fouling, microfouling and macrofouling through incorporation or inclusion of multiple functionalities. Hydrophilic polymers, such as poly(ethylene glycol), hydrogels, zwitterionic polymers and polysaccharides, resist attachment of marine organisms effectively due to extensive hydration. Fouling release polymer coatings, based on fluoropolymers and poly(dimethylsiloxane) elastomers, minimize adhesion between marine organisms and material surfaces, leading to easy removal of biofoulants. Polycationic coatings are effective in reducing marine biofouling partly because of their good bactericidal properties. Recent advances in controlled radical polymerization and click chemistry have also allowed better molecular design and engineering of multifunctional brush coatings for improved antifouling efficacies.     

氟橡胶F2314物理老化的研究

采用差示扫描量热（DSC）和动态力学分析等方法研究物理老化对氟橡胶F₂₃₁₄性能的影响。结果表明:在45℃下进行物理老化,随着物理老化时间的延长,氟橡胶F₂₃₁₄的储能模量增大,损耗因子减小;DSC吸收峰的热焓没有明显变化,但峰位向高温方向移动;松弛模量增大,且增幅逐渐增大。     

国内外含氟聚合物的应用及市场现状

介绍国内外含氟聚合物的应用及市场现状。2004年,全球含氟聚合物的产能约为20.3万t/a,产能利用率为65%;全球含氟聚合物的消费量累计达到13.27万t,消费额超过25亿美元。2004年,我国的含氟聚合物消费量为1.3万t,年均增长率为8%。预计,2009年我国含氟聚合物的消费量将达到1.5万～1.6万t。     

含氟聚碳酸酯的合成及其物性研究

用２，２－二（４－羟基苯）－１，１，１，３，３，３－六氟代丙烷和氯甲酸三氯甲酯（ＴＣＦ）进行缩合聚合，同时将上述两种单体与２，２，－二（４－羟基苯）丙烷（双酚Ａ）进行三元共聚合，然后测定聚合物的性能。实验结果表明，由于氟元素的引入，使聚合物的溶解性上升、表面能降低耐热性提高、折射率下降，使聚合物薄膜的柔软性增加、极限伸长率显著提高．