一种含酞侧基聚醚醚酮的稀溶液性质的研究（Ⅰ）

本文用光散身的粘度法研究了一种含酞侧基的聚醚醚酮(PEK-C)在氯仿(CKCl_3)和二甲基酰胺(DMF)中的稀溶液性质,建立了PEK-C在两种溶剂中的Mark-Houwink方程:并得到了高分子一溶剂相互作用参数χ_1和PEK-C的特征常数K_θ值: K_θ=6.25×10~(-2)ml/g,X_1=0.48,CHCl_3 K_θ=4.42×10~(-2)ml/g,X_1=0.49,DMF以及流体力学扩张因子α_η~3与分子量间的函数关系。     

PEK-C/PPS共混体系的相容性和结晶行为

结晶-非晶高聚物共混体系的相容性和结晶行为的研究已有许多报道。本工作研究了含酞侧基聚芳醚酮(PEK-C)与聚苯硫醚(PPS)共混物的相容性和结晶行为。 PEK-C为徐州工程塑料厂产品,未作封端处理,η?p/c=0.70;PPS为日本东丽产品。两者用双螺杆挤出机在320～350℃制成共混物。仪器为Perkin-Elmer DSC-7型差示扫描量热仪,升温速率10℃/min;DDV-Ⅱ-EA型全自动动态粘弹谱仪和理学D/max-ⅡBX-射线衍射仪。     

酞侧基聚芳醚砜和聚芳醚酮的相容性

本文报道注射级酞侧基聚芳醚砜(PES-C)和聚芳醚酮(PEK-C)共混试样的玻璃化转变行为和部分力学性能的研究结果。并讨论共混工艺对相容性的影响。 PES-C和PEK-C树脂均由中国科学院长春应用化学研究所徐州工程塑料厂合成,在三氯甲烷中的比浓粘度ηsp/c(20℃)分别为0.45和0.47。将粉状树脂在GH-100Q高速搅拌器内按配方混合,并在烘箱内干燥后,用SHJ-30双螺杆挤出机在320～350℃(物料温度)挤出造粒。     

酞侧基聚芳醚酮的核磁共振研究(Ⅰ)──链结构及NMR谱的归属

用1D NMR方法研究酞侧基聚芳醚酮(PEK-C)链结构,用二维同核化学位移相关与二维异核化学位移相关实验方法对1D NMR谱峰进行归属,探讨了二维异核远程相关实验在缩聚高分子研究中的应用,为PEK-C修饰机理以及共混相容机理的研究提供重要信息。溶液NMR谱图数据表明,PEK-C具有较规整的链结构。     

物理老化对PEK-C、PES-C及其复合材料的玻璃化转变热焓松弛特征的影响

本文用DSC技术研究了物理老化对PEK-C、PES-C及其共混物和复合材料玻璃化转变的影响.老化时间(t)延长,玻璃化转变温度(T_g)、热焓松弛峰温(T_(max))、峰高(△C_(pmax))和热焓(△H)提高;△H与lgt成线性关系.碳黑或碳纤维对PES-C的物理老化行为无影响,而反应性乙炔端基砜(ATS)固化物能限制PEK-C和PES-C在T_g以下温度的物理老化过程.利用物理老化能更为方便地判断多相体系的相容性,结果表明PEK-C/PSF为相容体系,而PEK-C/PES-C相容性较差.     

反渗透复合膜的制备和脱盐功能

以玻璃化温度高、强度大、易磺化和耐酸碱的带酞侧基的聚芳醚酮(PEK-C)为支撑膜材料,研究了PEK-C铸膜液组成及复合液配比等对PFT反渗透复合膜(PFT ROCM)制备及其脱盐功能的影响。 试剂与材料 糠醇(FA):化学纯。用前精制,三(2-羟乙基)异氰尿酸酯(THEIC)。熔点134～136℃。聚乙二醇-400(PEG-400):化学纯。DMF,DMAc,N-甲基吡咯烷酮(NMP)为分析纯,经脱水精制。异丙醇、硫酸为分析纯。十二烷基磺酸钠(SLS)化学纯。含酞侧基的聚醚醚酮PEK-     

非极性烷烃溶剂在聚乙烯膜中无限稀释扩散系数的测定

气相色谱法研究小分子溶剂与聚合物材料之间的相互作用是一种快速、准确、方便的方法,该方法可以用来研究多种小分子溶剂在聚合物中的溶解和扩散行为.通过气相色谱法测定了3种小分子烷烃溶剂(正庚烷、正壬烷和正癸烷)在固定液聚乙烯中的保留时间和半峰宽,用vanDeemter模型进行数据处理,得到3种小分子在聚乙烯膜中的无限稀释扩散系数.     

THE EFFECT OF IRRADIATION ON THE POLYETHERKETONE WITH CARDO GROUP

The effects of irradiation on the polyetherketone with cardo group (PEK-C) were studied. It was found that PEK-C can be crosslinked by irradiation under vacuum, while degradation reaction occurred in PEK-C at room temperature in the presence of air. Moreover. it was also found that Ts value of the crosslinked PEK-C at high temperature is higher than that at room temperature in the case of the same gel content, whose value is about 8℃higher than that of unirradiated PEK-C. The gelation dose of PEK-C at 300℃under vacuum is 1.5×10~4 Gy, which is about hundred times smaller than that at room temperature.     

新型聚芳醚酮与热致性液晶高聚物共混物流变性能和力学性能的研究

本文研究了新型聚芳醚酮与热致性液晶高聚物(PEK-C/LCP)共混物的流变性能及力学性能。结果表明:由于LCP的加入,PEK-C的熔体粘度降低;随着剪切速率的增加,共混物熔体流动活化能从223.5KJ/mol降为102.2KJ/mol。共混物的玻璃化转变温度从纯PEK-C的218℃降为199℃;除模量增加外,其它力学性能均有所下降。同时利用SEM观察了共混物冲击断面形貌,未发现有LCP微纤维生成。     

顶空-气相色谱法测定富马酸伊布利特原料药中5种溶剂残留量

建立了顶空-气相色谱法测定富马酸伊布利特原料药中5种溶剂残留量的方法.样品用N,N-二甲基甲酰胺(DMF)溶解,采用DB-624毛细管色谱柱进行分离,初始柱温为40℃,用火焰离子化检测器检测.结果表明:二氯甲烷、四氢呋喃、乙酸乙酯、乙醇和丙酮等5种溶剂均能完全分离,并在一定范围内呈线性关系,检出限(3S/N)依次为0....     

SULFONATION OF A NEW POLYETHERETHERKETONE PREPARED FROM PHENOLPHTHALEIN

A novel polyetheretherketone (PEK-C) prepared from phenolphthalein has been synthesized. In order to improve some of its properties for application in high performance membrane, the PEK-C has been sulfonated with concentrated sulfuric acid. Degree of sulfonation can be regulated by controlling the temmperature and time of sulfonation. The characterization of the sulfonated PEK-C in sodium salt form has been made by IR, ~1H NMR and ~(13)C NMR etc. It is shown that the sulfonation appears to take place exclusively in the ortho position to phenolic ether of phenolphthalein unit. The result is in agreement with theoretical deduction. Some properties of the sulfonated PEK-C, such as solubility, transition temperature, thermal degradation and hydrophilicity have also been discussed.     

碳布／聚芳醚酮热塑性复合材料的破坏允限

本文研究了碳布增强的聚芳醚酮复合材料的破坏允限。用二碘甲烷增强的x-射线照相法对试件内部的冲击缺陷进行观察,结果表明,其破坏类型可分为分层、基体开裂、纤维断裂和脱胶。用三点弯曲方法测定了损伤试件的剩余弯曲强度与冲击能量的关系。     

用XPS振起伴峰表征聚苯醚酮的辐射凝胶化剂量

X-射线光电子能谱(XPS)振起(Shake-Up)伴峰主要是伴随主光电子的电离所导致的最高占有轨道到最低未占有轨道电子跃迁的结果.Carlson及Clark的工作声明这种振起伴峰是某些共轭π电子体系的表征,振起伴峰的相对强度与π电子共轭情况有关。 含酚酞侧基聚芳醚酮(PEK-C)是一种新型耐高温工程塑料,其主侧链均带苯环:     

酞侧基聚芳醚酮的撕裂不稳定性

酞侧基聚芳醚酮的撕裂不稳定性韩艳春，杨宇明，李滨耀，冯之榴（中国科学院长春应用化学研究所长春１３００２２）关键词酞侧基聚芳醚酮，撕裂不稳定性，延性撕裂由Ｐａｒｉｓ等［１］根据弹塑性断裂理论发展的撕裂模量理论是表征延性材料失稳的重要理论之一。当裂纹扩展...     

UV辐照接枝聚合制备亲水性纳滤膜

用紫外光引发自由基共聚接枝的方法对酚酞基聚芳醚酮(PEK-C)超滤膜表面进行改性制备了亲水性荷电纳滤膜. 研究了用不同单体接枝改性膜对盐溶液的截留性能, 证明了Donnan电荷效应对纳滤膜分离性能的影响. 在此基础上, 通过丙烯酸(AA)与对苯乙烯磺酸钠(SSS)的共聚接枝, 并改变它们在接枝液中的相对含量, 成功地制备出膜的表观截留率和渗透通量都较高的纳滤膜.     

两种高Tg非线性光学聚合物母体及掺杂,极化的研究

利用具有非线性光学活性的对硝基苯胺掺杂高玻璃化转变温度的聚芳醚砜(PES-C)和聚芳醚酮(PEK-C),得到了两种掺杂含量较高的掺杂型非线性光学聚合物体系。电晕极化表明较高的取向和较慢的松驰。     

Dual Ag/ZnO‐Decorated Micro‐/Nanoporous Sulfonated Polyetheretherketone with Superior Antibacterial Capability and Biocompatibility via Layer‐by‐Layer Self‐Assembly Strategy

Polyetheretherketone is attractive for dental and orthopedic applications due to its mechanical attributes close to that of human bone; however, the lack of antibacterial capability and bioactivity of polyetheretherketone has substantially impeded its clinical applications. Here, a dual therapy implant coating is developed on the 3D micro‐/nanoporous sulfonated polyetheretherketone via layer‐by‐layer self‐assembly of Ag ions and Zn ions. Material characterization studies have indicated that nanoparticles consisting of elemental Ag and ZnO are uniformly incorporated on the porous sulfonated polyetheretherketone surface. The antibacterial assays demonstrate that Ag‐decorated sulfonated polyetheretherketone and Ag/ZnO‐codecorated sulfonated polyetheretherketone effectively inhibit the reproduction of Gram‐negative and Gram‐positive bacteria. Owing to the coordination of micro‐/nanoscale topological cues and Zn induction, the Ag/ZnO‐codecorated sulfonated polyetheretherketone substrates are found to enhance biocompatibility (cell viability, spreading, and proliferation), and hasten osteodifferentiation and ‐maturation (alkaline phosphate activity (ALP) production, and osteogenesis‐related genetic expression), compared with the Ag‐decorated sulfonated polyetheretherketone and the ZnO‐decorated sulfonated polyetheretherketone counterparts. The dual therapy Ag/ZnO‐codecorated sulfonated polyetheretherketone has an appealing bacteriostatic performance and osteogenic differentiation potential, showing great potential for dental and orthopedic implants.     

Composite membranes prepared from glutaraldehyde cross-linked sulfonated cardo polyetherketone and its blends for the dehydration of acetic acid by pervaporation

Cardo polyetherketone (PEK-C) composite membranes were prepared by casting glutaraldehyde (GA) cross-linked sulfonated cardo polyetherketone (SPEK-C) or silicotungstic acid (STA) filled SPEK-C and poly(vinyl alcohol) (PVA) blending onto a PEK-C substrate. The compatibility between the active layer and PEK-C substrate is improved by immersing the PEK-C substrate in a GA cross-linked sodium alginate (NaAlg) solution and using water–dimethyl sulfoxide (DMSO) as a co-solvent for preparing the STA-PVA-SPEK-C/GA active layer. The pervaporation (PV) dehydration of acetic acid shows that permeation flux decreased and separation factor increased with increasing GA content in the homogeneous membranes. The permeation flux achieved a minimum and the separation factor a maximum when the GA content increased to a certain amount. Thereafter the permeation flux increased and the separation factor decreased with further increasing the GA content. The PV performance of the composite membranes is superior to that of the homogeneous membranes when the feed water content is below 25 wt%. The permeation activation energy of the composite membranes is lower than that of the homogeneous membranes in the PV dehydration of 10 wt% water in acetic acid. The STA-PVA-SPEK-C-GA/PEK-C composite membrane using water–DMSO as co-solvent has an excellent separation performance with a flux of 592 g m⁻² h⁻¹ and a separation factor of 91.2 at a feed water content of 10 wt% at 50 °C.