改良型聚苯硫醚的齐聚物研究

用质谱法研究了硫磺溶液法合成改良型聚苯硫醚（ＰＰＳ）的齐聚物组成，并与硫磺溶液法合成用聚聚苯硫醚的齐聚物组成进行了对比分析。结果表明：改良型ＰＰＳ除有与通用型ＰＰＳ相同的齐聚物外，不家双蜞线型苯硫醚齐聚物ＨＳ－Ｈ６Ｈ４Ｓ，Ｘ＝１，２，３，单巯基含一个二硫键的线型苯硫醚齐聚物Ｃ６Ｈ５－ＳＳＨ，Ｘ＝６和苯硫醚太三聚体，δ＝３，与通用型不同的是：无双氯端基的线型苯硫昌的Ｃｌ＝－Ｃ６Ｈ４Ｃｌ和苯硫醚环状六     

树脂基复合材料防护涂层研究进展

树脂基复合材料因其耐热性和耐冲蚀磨损性能比较低,限制其在航空发动机上的应用。本文针对当前树脂基复合材料特点,对其防护涂层国内外的研究现状进行了介绍,探讨了不同涂层的应用特点并且提出树脂基复合材料防护涂层性能的研究方向,通过降低喷涂过程中基体表面温度,提高涂层与基体的结合强度,创新喷涂工艺,改良喷涂材料,进而解决其喷涂工艺过程中遇到的问题。     

反应热喷涂的发展

反应热喷涂是自蔓延高温合成（ＳＨＳ）同热喷涂技术相结合而发展起来的新技术。本文综述反应热喷涂的工艺,过程和涂层结构及性能。     

国产聚苯硫醚基本性能研究

分析测定了ＰＰＳ基本性能指标，并研究指出流变，结晶，热解动力学与其分子结构的关系。流变分析表明，分子量是影响粘度，加工性的重要指标；当热历程不同时，结晶度，结晶形态会有变化，热解动力学结果表明，ＰＰＳ适合作耐高温材料。     

线形高分子量聚苯硫醚树脂的合成研究

以硫磺和对二氯苯为原料,在极性有机溶剂中,用以羧酸盐为主的复合催化体系成功地合成了高分子量ＰＰＳ树脂。合成的ＰＰＳ树脂经红外光谱分析,激光拉曼光谱分析,Ｘ－射线衍射分析以及热分析后表明,该树脂与日本吴羽化学工业公司第二代线形高分子量ＰＰＳ树脂Ｆｏｒｔｒｏｎ具有相同的结构和性质,为线形高分子量ＰＰＳ树脂。该树脂具有分子量高,熔融粘度低,加工时几乎不变色等特点。     

聚合工艺对聚丙烯稳定性的影响

选取淤浆法（采用高效的ＨＹ－ＨＳⅡ型催化剂）ＰＰ树脂和间歇式液相小本体法ＰＰ树脂，通过贮存试验，加工稳定性试验，热烘箱老化试验和户外曝露试验，探讨了ＰＰ聚合工艺路线和残留于ＰＰ树脂中的微量催化剂对ＰＰ稳定性的影响。     

国产Z30S聚丙烯纺制细旦丙纶复丝的研究

研究了国产Ｚ３０Ｓ聚丙烯及其改性切片的分子量（ＭＷ）和分子量分布（ＭＷＤ）以及纺丝工艺对纺制细旦丙纶复丝可纺性和卷绕丝结构性质的影响。研究表明，采用Ｚ３０Ｓ切片即使纺丝温度高达２８０℃时，卷绕丝仍是α晶型结构，若添加少量降温母粒共纺或经改性后纺丝，卷绕丝可获得准晶型或混晶型结构，有较好的可纺性和后拉伸性；纺丝工艺条件，诸如纺丝温度、冷却条件、泵供量和纺丝速度等对卷绕丝的结构和性质虽起重要的影响，但ＰＰ的ＭＷ和ＭＷＤ则起首要的影响。     

炼油厂小本体聚丙烯的生产与技术现状

文章从原理、工艺及生产等各个方面对小本体ＰＰ装置作了详细的介绍，将近年开发的高效催化剂Ｎ型、ＣＳ－１型、ＳＣ型、ＺＨ型与传统的ＢＲ－Ⅱ型的应用情况作出系统的比较，论述了丙烯原料精制的原理、方法、工艺特点及作用，分析了ＰＰ生产当中存在的问题及根源。     

聚苯硫醚及其在化工防腐蚀中的应用

本文阐述了聚苯硫酸醚（ＰＰＳ）树脂的制备、耐腐蚀性能及在化工防腐蚀方面的应用，同时对ＰＰＳ涂层的加工方法进行了简单的介绍。     

喷涂聚脲弹性体技术用于CCTV道具制作

青岛海洋化工研究院开发的喷涂聚脲弹性体近期成功用于中央电视台 (ＣＣＴＶ)道具和舞台布景制作的专用保护涂层。ＣＣＴＶ道具和舞台布景是以发泡聚苯乙烯 (ＥＰＳ)为基材 ,在造型的ＥＰＳ道具表面喷涂成型具一定厚度的坚硬聚脲弹性体保护外壳 ,最后上色即成。该工艺又被称为ＳＩＭ技术 ,效率高、成本低 ,应用前景好。由于道具和舞台布景结构复杂、雕刻精细、涂层厚度大 ,通常的喷涂工艺难以实施。实验表明 ,海化院研制的“ＳＰＵＡ 40 3喷涂聚脲弹性体保护涂层”用于道具制作 ,具有无流挂、无接缝、外型再现性好、美观、抗碰撞、力学性能…     

Effect of polydopamine coating on improving photostability of polyphenylene sulfide fiber

The effect of polydopamine coating on improving photostability of polyphenylene sulfide (PPS) fiber was investigated in detail. Due to strong adhesion ability and self-polymerization of dopamine in alkaline solution, the polydopamine could be easily coated on polyphenylene sulfide fiber under mild conditions. XPS, ATR-FTIR and SEM, which indicated the polydopamine coating was homogeneous, confirmed the polydopamine coating on PPS fiber. The UV-spectra analysis of polydopamine coating showed that it had a strong absorbance in ultraviolet wavelength and was very stable to it, which implied that the polydopamine was a potential photoprotection agent. 2,2-Diphenyl-1-picrylhydrazyl (DPPH) experiment further revealed that the PDA could quench free radicals, suggesting PDA was a good antioxidant. This scavenging ability of PDA might contribute to improving photostability of PPS fiber. Compared to pristine PPS fiber, the PPS fiber coated by polydopamine obviously had better photostability after ultraviolet irradiation according to mechanical test, which proved that polydopamine coating did improve the photostability of PPS fiber.     

炭黑改性聚苯硫醚纤维性能研究

在聚苯硫醚(PPS)树脂中加入少量的炭黑制成切片,采用熔融纺丝法制得改性PPS纤维。研究了炭黑的加入量对改性PPS纤维的取向、结晶和热性能的影响,以及改性PPS纤维经紫外光老化前后力学性能的变化。结果表明:加入炭黑可使PPS纤维取向度降低,结晶度提高;炭黑质量分数为1.5%的改性PPS纤维耐热性较好;经紫外光照射192 h后,与纯PPS纤维相比,其断裂强度保留率提高了30.3%,断裂伸长保留率提高了41.4%,抗紫外光老化性能得到了改善。     

防腐涂料用苯丙乳液的新型改性偶联剂的选择

采用新型二烷氧基型硅烷偶联剂及传统三烷氧基型硅烷偶联剂对苯丙乳液进行改性,通过电化学阻抗方法对改性前后涂膜的防腐性能进行研究。结果表明,改性涂膜的防腐性能优于未改性涂膜,而新型二烷氧基型硅烷偶联剂KH-578改性苯丙乳液的防腐性能最佳。     

Preparation,characterization, and some physical properties of polypropylene/poly(methyl acrylate)‐grafted glass wool composites

Polypropylene/poly(methyl acrylate)‐grafted glass wool (PMA‐g‐GW) mixes were prepared. The polymerization process was carried out using potassium persulfate (PPS) and PPS/acetone sodium bisulfite (ASBS) as a redox‐pair initiation system at 60 and 70°C. The effect of using PPS or PPS/ASBS on the grafting percent and conversion percent reveals that the conversion percent values on using PPS as an initiator are higher than those of PPS/ASBS, while in the case of grafting, the inverse is true, that is, using PPS as an initiator gives grafting percent values lower than those that can be obtained using PPS/ASBS. The dielectric properties, thermal diffusivity, specific heat capacity, and thermal conductivity of PP loaded with modified glass wool as a function of different types and concentrations of initiators—used in the grafting polymerization process, namely, PPS and the redox initiating system—were also studied. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 87: 723–732, 2003     

Dispersion of Poly(phenylene ether) in a Poly(phenylene sulfide)/Poly(phenylene ether) Alloy

We have devised and developed a new method for the preparation of a poly(phenylene sulfide)/poly(phenylene ether) (PPS/PPE) alloy, which has micro‐dispersed PPE in the PPS matrix. PPS was chemically treated to activate the reactivity of the PPS end‐group by extrusion in the presence of diphenylmethane diisocyanate (MDI) in its molten state at 300°C. The reactive processing of the MDI‐treated PPS with maleic anhydride‐modified PPE gave a PPS/PPE alloy with micro‐dispersed PPE in the PPS matrix. The PPS/PPE alloy showed mechanical properties superior to those of PPS at elevated temperature (150°C) and also showed precision‐molding ability superior to that of PPS.     

Nonisothermal crystallization of poly(phenylene sulfide) in presence of molten state of crystalline polyamide 6

The nonisothermal crystallization and melting behavior of a poly(phenylene sulfide) (PPS) blend with polyamide 6 (PA6) were investigated by differential scanning calorimetry. The results indicate that the crystallization parameters for PPS become modified to a greater extent than those for PA6 in the blends. The PPS and PA6 crystallize at high temperature as a result of blending. The crystallization temperatures of PPS in its blends are always higher than that of pure PPS and are independent of the melting temperature and the residence time at that temperature. The PPS crystallization peak becomes narrower and the crystallization temperature shifts to a higher temperature, suggesting a faster rate of crystallization as a result of blending with PA6. This enhancement in the nucleation of PPS could be attributed to the possible presence of interfacial interactions between the component polymers to induce heterogeneous nucleation. On the other hand, the increase in the crystallization temperature of PA6 can be attributed to the heterogeneous nucleation provided by the already crystallized PPS. The heterogeneous nucleation induced by interfacial interactions depends on the temperature at which the polymers remain in the molten state and on the storage time at this temperature. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 3033–3039, 1999     

Morphology and thermal properties of PPS/ABS blend systems

In this study the PPS/ABS blend system was investigated in order to collectively identify the relationship among blend morphology, chemical compatibilization, and thermal property. The ABS resin was chemically modified by the incorporation of maleic anhydride through reactive extrusion for enhanced compatibilization, and ABS/PPS and the modified ABS/PPS blends were prepared by a twin‐screw extruder. The effect of chemical modification of ABS on the morphological, mechanical, and thermal properties of the resulting blend was examined. A strong chemical interaction between PPS and MABS was observed by optical microscopy, scanning electron microscopy, and FTIR. The PPS/MABS blend showed a single glass‐transition temperature in dynamic mechanical analysis, demonstrating pseudo‐homogeneous phase morphology induced by chemical compatibilization. The PPS/MABS blend also exhibited an enhanced thermal stability and heat distortion temperature compared with the PPS/ABS blend. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 87: 661–665, 2003     

Quality enhancement of copper oxide thin film synthesized under elevated gravity acceleration by two-axis spin coating

Two-Axis spin coating as a new modified technique is employed to enhance the quality and surface leveling of thin films. The modified technology utilizes a synthetic centrifugal force perpendicular to the surface which generates an elevated gravity acceleration while spreading the coating on the entire wafer surface. In this paper, copper acetate sol-gel is coated by conventional and Two-Axis spin coating techniques. The coated layers are sintered in an air furnace at 275 °C. The fabricated layers are characterized by GIXRD, EDX, AFM and SEM devices. Wettability and Surface Free Energy (SFE) of sintered films using the contact angle technique are measured, and evaluated by the Owens-Wendt method. XRD and EDX spectra show a higher intensity of copper oxide phase using Two-Axis spin coating technology. AFM micrographs showed an improvement in the surface leveling within the Two-Axis spin coated layer. A comparison between the SFE of conventional and Two-Axis spin coated layers shows an increase in SFE of the layer synthesized under 200g artificial gravity acceleration.     

Plasma surface modification of poly(phenylene sulfide) films for copper metallization

Poly(phenylene sulfide) (PPS) films were modified by Ar, O₂, N₂ and NH₃ plasmas in order to improve their adhesion to copper metal. All four plasmas modified the PPS film surfaces, but the NH₃ plasma modification was the most effective in improving adhesion. The NH₃ plasma modification brought about large changes in the surface topography and chemical composition of the PPS film surfaces. The peel strength for the Cu/plasma-modified PPS film systems increased linearly with increasing surface roughness, R _a or R _rms, of the PPS film. The plasma modification also led to considerable changes in the chemical composition of the PPS film surfaces. A large fraction of phenylene units and a small fraction of sulfide groups in the PPS film surfaces were oxidized during the plasma modification process. Nitrogen functional groups also were formed on the PPS film surfaces. The NH₃ plasma modification formed S—H groups on the PPS film surfaces by reduction of S—C groups in the PPS film. Not only the mechanical interlocking effect but also the interaction of the S—H groups with the copper metal may contribute to the adhesion of the Cu/PPS film systems.     

纳米SiO2改性硅树脂天线罩涂层性能测试

随着现代导弹技术的快速发展,石英陶瓷天线罩得到广泛应用,但因其自身的易吸潮、耐污差等缺点,性能优异的天线罩防潮涂料的研制显得至关重要。本文通过对现有硅树脂进行改性制备了纳米SiO_2改性硅树脂涂层,并进行了相关性能测试分析。测试表明。改性后的硅树脂涂层吸水率明显下降,电性能优异,比现有纯硅树脂涂料硬度更高,耐热性更好。