新型杂萘联苯聚醚砜酮及其应用

介绍瓣型杂萘联苯聚醚砜酮的制备，性能和应用，研究表明该树脂各项性能优异，是一种优良的绝缘材料，将其作用漆包线漆，操作工艺性好，且属于Ｈ级漆包线漆。     

杂萘联苯聚醚砜超滤膜的研制

以杂萘联苯聚醚砜(PPES)为膜材料,N-甲基-2-吡咯烷酮(NMP)为溶剂,采用相转化法制备了非对称超滤膜.结果表明,聚合物浓度的变化、添加剂含量的变化、凝胶浴温度或停留蒸发时间的改变都会影响超滤膜的性能,所制得的PPES超滤膜在0.1 Mpa的操作压力下对PEG10000的截留率高于95%,纯水通量可达632 L·m-2·h-1.     

含二氮杂萘酮联苯结构双马来酰亚胺的合成

由含二氮杂萘联苯酮结构的芳香族二元胺4-[4-(4-氨基苯氧基)苯基]-2-(4-氨基苯基)二氮杂萘-1-酮(DHPZ-DA)与顺丁烯二酸酐(MA)反应得到了含二氮杂萘酮联苯结构的双马来酰亚胺预聚物(DHPZ-BMI),并对其进行了FT-IR红外及1H-1H COSY NMR核磁表征。对其溶解性的研究表明,DHPZ-BMI易溶或部分溶解于一些常见低沸点极性溶剂,如氯仿、丙酮。利用示差扫描量热仪(DSC)对DHPZ-BMI热行为进行了研究,结果表明该预聚物的熔点较高,熔融和固化过程的温度范围在低升温速率下有所重叠。为此,加入不同含量的2,2′-二烯丙基双酚A(DABPA)改善其工艺性,并采用DSC对其热性能进行了初步研究,结果表明DABPA的加入,可明显改善树脂的固化行为。     

含二氮杂萘酮联苯结构耐高温聚氨酯胶的合成

采用本体聚合,将自制的含有4—(4’—羟基苯基)—2,3—二氮杂萘—1—酮(DHPZ）^[1—3]作为单体引入双组分聚氨酯的固化剂中,合成了一类新型的含杂萘三联苯结构的聚氨酯胶粘剂。DHPZ的扭曲和非共平面杂环结构使聚合物难以实现长程有序。从而提高了其刚性和耐高温性能。常温拉伸强度不低于20MPa,而且具有较强的耐酸,耐水水解性能。以FT-IR,DSC,TGA等分析手段研究了聚合物的结构和耐热性能。结果表明,新型聚氨酯胶粘剂具有高的玻璃化转变温度（Tg=340～370K）,氮气氛中10%热质量损失温度为570K,在520K的温度下无热质量损失。该胶粘剂可以在高温条件下使用。     

耐高温新型含杂萘联苯聚醚砜嵌段共聚物的性能

将氯端基聚醚醚砜齐聚物和杂萘联苯类双酚羟端基齐聚物通过溶液缩聚,成功地合成了一系列新型聚醚醚砜-聚醚砜(PEES-PPES)嵌段共聚物,并用IR、DSC、TGA、X-WAXD等测试手段对聚合物进行了表征。结果表明:PEES-PPES具有较高的热稳定性,较好的溶剂溶解性;砜基比例的变化对PEES-PPES的热性能有较大的影响,表明砜基对杂萘联苯聚醚砜改性效果明显。     

含杂萘酮联苯结构耐高温聚氨酯胶粘剂的合成

采用本体聚合，将自制的含有4-(4’-羟基苯基)-2，3-二氮杂萘—1-酮(DHPz)作为单体引入双组分聚氨酯的固化剂中，合成一类新型的含杂萘类联苯结构的聚氨酯胶粘剂。DHPz的杂萘类联苯结构提高了胶粘剂的结构刚性和耐高温性能。常温剪切强度不低于20MPa，而且具有较强的耐酸、耐水解性能。以FT-IR、DSC、TGA等分析手段研究了聚合物的结构和耐热性能。结果表明，新型的聚氨酯胶粘剂具有较高的玻璃化转变温度(Tg＝170—200℃)，在氮气氛围中10％热失重温度为300℃，250℃无失重。该胶粘剂可在较高温度下使用。     

磺化杂萘联苯聚醚砜纳滤膜用于海水预处理

采用纳滤对海水进行预处理,初步考察了不同操作压力、回收率、温度条件对水通量的影响和膜对海水中主要离子的脱除效果。当水的回收率控制在30%时,在0.5～1.3 MPa压力范围内,膜对各主要离子的脱除率随着压力的升高逐渐增大。当固定操作压力为1.3 MPa,增大回收率时,膜对各主要离子的脱除呈下降趋势。当回收率为7%时,渗透出水的Langelier饱和指数(LSI)为-0.03<0,无结垢倾向。在20～90℃范围内,随着操作温度升高膜对各离子的脱除率略有降低,而水通量逐渐增大。     

含二氮杂萘联苯结构聚氨酯的合成与性能研究

以聚己内酯二醇(PCL)、4-(4'-羟基苯基)-2,3-二氮杂萘-1-酮(DHPZ)、4,4'-二苯基甲烷二异氰酸酯(MDI)及1,4-丁二醇为原料,采用一步法设计合成了含二氮杂萘联苯结构聚氨酯溶液。采用红外光谱仪、X射线衍射仪、热重分析仪以及万能力学试验机,考察了DHPZ含量对聚氨酯胶膜耐高温性能和力学性能的影响。结果表明,二氮杂萘联苯结构提升了聚氨酯膜的耐热性能,DHPZ质量分数从0到5%,初始热分解温度(T_d~(1%))可提高10～20℃;当DHPZ质量分数为2%时,聚氨酯膜力学性能较优,其拉伸强度达到67. 1 MPa,断裂伸长率为860%,弹性模量为4. 5 MPa。     

无机杂化倍半硅氧烷／磺化杂萘联苯聚醚酮质子导电复合膜

通过磺化反应制备了一系列不同磺化程度的磺化杂萘联苯聚醚酮（SPPEK）,采用共混法将无机杂化倍半硅氧烷（POSS）掺杂到IEC值为1．60的SPPEK中,通过溶液浇铸制得复合膜。对SPPEK／POSS复合膜进行了FTIR、TGA分析和SEM表观形貌观察。研究了SPPEK／POSS复合膜的吸水性、溶胀度和质子导电性,并与Nation 117进行对比。随着POSS的加入,复合膜的吸水性、溶胀度和氧化稳定性提高。SPPEK／POSS复合膜的室温电导率达到0．75×10^-2S·cm^-1,接近Nafion 117膜相同条件下的电导率（1．08×10^-2S·cm^-1）。随着温度升高,SPPEK／POSS复合膜的电导率逐渐增大。采用不同测试方法分别对复合膜的膜平面方向和厚度方向上的电导率进行了测试,表明在两个方向上的电导率相差较大,SPPEK／POSS复合膜室温下膜平面方向上的电导率达到2．1×10^-2S·cm^-1。     

杂萘聚芳酰胺的合成与性能

由自制的1,2-二氢-2-(4-氨基苯基)-4-[4-(4-氨基苯氧基)-苯基]-二氮杂萘-1-酮(DHPZ—DA)、4,4’-二氨基二苯甲烷(DAPM)、对苯二胺与对苯二甲酸进行缩聚合,改变不同二胺的配比,制成一系列高相对分子质量的聚芳酰胺,其特性粘数为0．81-2.38dL／g。用傅里叶变换红外光谱和核磁共振氢谱分柝了聚合物的结构,利用差示扫描量热法和热重分析研究了聚合物的耐热性能,结果表明：聚芳酰胺的玻璃化转变温度在220℃以上,氮气气氛中．5％热失重温度在450℃以上;当DHPZ—DA的摩尔分数与DAPM的摩尔分数之和超过70％时,聚合物能溶于非质子极性溶剂中。     

新型间甲基取代杂萘联苯型聚芳酰胺的研制

采用间甲基取代杂萘联苯型类双酚4-(2-甲基-4-羟基苯基)-2,3-二氮杂萘-1-酮与对氯苯腈反应制得二腈化合物,进一步水解为二酸,以此新型二酸与三种二胺聚合制得的三种新型聚芳酰胺均具有较高的耐热性能,其玻璃化转变温度在287～317℃,且易溶于非质子极性溶剂中,聚合物的特性粘数为1.62～1.83 dL/g,拉伸强度为87～98 MPa,断裂伸长率为6.4％～8.4％,拉伸模量为0.7～1.3 GPa,表面电阻系数为10~(14)Ω,体积电阻系数达10~(17)Ω·cm。     

Synthesis and characterization of polyimides containing pyridine moiety

A series of new polyimides was prepared by reacting 2,6‐diaminopyridine with various aromatic dianhydrides in DMF in 1 : 1 mole ratio. All the resulting polyimides were readily soluble in organic solvents such as dimethylformamide, N,N‐dimethylacetamide, pyridine, m‐cresol, THF, etc. They also show good film‐forming ability. The polyimides exhibit good thermal stability and mechanical properties. The polymers have high T_g in the range of 252–296°C. The inherent viscosities of the polymers vary from 0.81 to 1.28 dL/g. A new class of bismaleimide and polyaspartimide as also synthesized. All the resulting polymer structures were characterized by FTIR and elemental analysis. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 1846–1853, 2004     

Synthesis and properties of novel poly(benzimidazopyrrolone amide)s containing pyridine moieties

A series of new poly(benzimidazopyrrolone amide) (PPA) copolymers were synthesized by a two‐step procedure, which was the solution polycondensation of a novel pyridine‐containing tetraamine with various aromatic dianhydrides at a room temperature and cyclization of the resulting prepolymers at a high temperature, respectively. The resulting prepolymers from the solution polycondensation, that is, poly(amide amino acid)s (PAAAs), had inherent viscosities of 0.82–0.91 dL/g; then, tough and flexible PPA films could be successfully prepared by the casting of the PAAA solutions onto a glass substrate followed by thermal curing with a program temperature procedure up to 350°C. The obtained PPA films exhibited not only excellent thermal properties with onset decomposition temperatures in the range 502–521°C, glass‐transition temperatures in the range 299–337°C, and residual weight retentions at 700°C in air of 29.1–34.8% but also good mechanical properties with tensile strengths of 102.1–115.9 MPa and elongations at break of 6.8–7.4%. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

Synthesis and characterization of highly soluble poly(ether imide)s containing indane moieties in the main chain

A new indane containing unsymmetrical diamine monomer ( 3 ) was synthesized. This diamine monomer leads to a number of novel semifluorinated poly (ether imide)s when reacted with different commercially available dianhydrides like benzene‐1,2,4,5‐tetracarboxylic dianhydride (PMDA), benzophenone‐3,3′, 4,4′‐tetracarboxylic dianhydride (BTDA), 4,4′‐(hexafluoro‐isopropylidene)diphthalic anhydride (6FDA), 4,4′‐oxydiphthalic anhydride (ODPA), and 4,4′‐(4,4′‐Isopropylidenediphenoxy)bis(phthalic anhydride) (BPADA) by thermal imidization route. All the poly(ether imide)s showed excellent solubility in several organic solvents such as N‐methylpyrrolidone (NMP), N,N‐dimethylformamide (DMF), N,N‐dimethylacetamide (DMAc), tetrahydrofuran (THF), chloroform (CHCl₃) and dichloromethane (DCM) at room temperature. These light yellow poly (ether imide)s showed very low water absorption (0.19–0.30%) and very good optical transparency. Wide angle X‐ray diffraction measurements revealed that these polymers were amorphous in nature. The polymers exhibited high thermal stability up to 526°C in nitrogen with 5% weight loss, and high glass transition temperature up to 265°C. The polymers exhibited high tensile strength up to 85 MPa, modulus up to 2.5 GPa and elongation at break up to 38%, depending on the exact polymer structure. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009     

Synthesis and characterization of novel chain‐extended bismaleimides containing fluorenyl cardo structure

Novel fluorenyl cardo chain‐extended bismaleimides (FCCEBMIs) were synthesized by reacting maleic anhydride with fluorenyl cardo diamine and different dianhydrides. FCCEBMIs were characterized by FT‐IR spectra (FT‐IR), ¹H NMR, and elemental analysis. All FCCEBMI monomers were readily soluble in a variety of organic solvents, such as N‐methyl‐2‐pyrrolidinone, N,N‐dimethyl acetamide, chloroform (CHCl₃), methylene chloride (CH₂Cl₂), dimethyl sulfoxide, and tetrahydrofuran when compared with 9,9‐bis(4‐maleimidophenyl) fluorene. Curing process was investigated by differential scanning calorimetry. Thermal properties of the cured FCCEBMIs were characterized by thermogravimetry analysis, the cured products are stable up to 430°C. The results show that the FCCEBMIs with imide structure improve significantly the solubility of bismaleimide (BMI) in organic solvents without sacrificing thermal properties of cured BMIs. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

New heteroaromatic polyazomethines containing naphthyridine moieties: Synthesis,characterization, and biological screening

A new series of heteroaromatic polyazomethines containing 1,8‐naphthyridine moieties in the polymer backbone were synthesized with a solution polycondensation technique. A new heteroaromatic monomer containing 1,8‐naphthyridine moieties (4‐ethoxy‐2,7‐dicarboxaldehyde‐1,8‐naphthyridine) was synthesized with an analogous synthetic sequence and confirmed by elemental and spectral data. The resulting polymers were characterized by elemental, spectral analyses, solubility and viscometry measurements. All the synthesized polyazomethines had better solubility in polar aportic solvents. The thermal properties of those polymers were evaluated by thermogravimetric analysis, differential thermogravimetry, and differential thermal analysis measurements and correlated to their structural units. All the polymers had nearly similar maximum polymer decomposition temperatures, which were in the range 557–577°C. A very large difference between the glass transitions (92–222°C) was observed. In addition, with gel permeation chromatography, the molecular weight determination of selected examples of those polymers was evaluated. The values of the average molecular weight for polyazomethines 7 _b and 7 _c were 34,914 and 24,859, respectively. On the other hand, the biological screening of all of the synthesized polyazomethines was performed in variety of bacteria and fungi. Most of the polyazomethines showed a significant influence against Gram‐negative bacteria. The minimum inhibitory concentration of the most active polymers was 0.05 mg/mL. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

Synthesis and characterization of polyetherimides containing multiple ether linkages and pendent pentadecyl chains

4‐(4‐(4‐(4‐Aminophenoxy)‐2‐pentadecylphenoxy)phenoxy)aniline (APPPA) was synthesized starting from cashew nut shell liquid‐derived bisphenol, i.e. 4‐(4‐hydroxyphenoxy)‐3‐pentadecylphenol, by nucleophilic substitution reaction with 4‐chloronitrobenzene followed by reduction of the formed 4‐(4‐nitrophenoxy)‐1‐(4‐(4‐nitrophenoxy)phenoxy)‐2‐pentadecylbenzene. Three new polyetherimides containing multiple ether linkages and pendent pentadecyl chains were synthesized by one‐step high‐temperature solution polycondensation of APPPA in m‐cresol with three aromatic dianhydrides, i.e. 3,3′,4,4′‐oxydiphthalic anhydride, 4,4′‐(hexafluoroisopropylidene)diphthalic anhydride and 3,3′,4,4′‐biphenyltetracarboxylic dianhydride. Inherent viscosities and number‐average molecular weights of the polyetherimides were in the ranges 0.66–0.70 dL g^?1 and 17 100–29 700 g mol^?1 (gel permeation chromatography, polystyrene standards), respectively, indicating the formation of reasonably high molecular weight polymers. The polyetherimides were soluble in organic solvents such as chloroform, dichloromethane, tetrahydrofuran, pyridine, m‐cresol, N,N‐dimethylformamide, N,N‐dimethylacetamide, N‐methylpyrrolidone and dimethylsulfoxide, and could be cast into transparent, flexible and tough films from their solutions in chloroform. The polyetherimides exhibited glass transition temperatures (T_g) in the range 113–131 °C. The lowering of T_g could be attributed to the combined influence of flexibilizing ether linkages and pentadecyl chains which act as ‘packing‐disruptive’ groups. The temperature at 10% weight loss (T₁₀), determined from thermogravimetric analysis in nitrogen atmosphere, was in the range 460–470 °C demonstrating good thermal stability. The virtues of solubility and large gap between T_g and T₁₀ mean that the polyetherimides containing pendent pentadecyl chains have possibilities for both solution as well as melt processability. © 2015 Society of Chemical Industry     

Synthesis,characterization, and properties of a novel epoxy resin containing both binaphthyl and biphenyl moieties

A new epoxy resin containing both binaphthyl and biphenyl moieties in the skeleton (BLBPE) was synthesized and confirmed by electrospray ionization mass spectroscopy, ¹H‐nuclear magnetic resonance spectroscopy, and infrared spectroscopy. To evaluate the combined influence of two moieties, one epoxy resin containing binaphthyl moiety and another containing biphenyl moiety were also synthesized, and a commercial biphenyl‐type epoxy resin (CER3000L) was introduced. Thermal properties of their cured polymers with phenol p‐xylene resins were characterized by differential scanning calorimetry, dynamic mechanical, and thermogravimetric analyses. The cured polymer obtained from BLBPE showed remarkably higher glass transition temperature and lower moisture absorption, as well as comprehensively excellent thermal stability. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009     

Synthesis and cross-linking of bifunctional monomers containing carbazole moieties

New bifunctional carbazolyl-containing monomers were synthesized and their cationic photo-initiated polymerization investigated. The monomers containing two reactive groups such as epoxy, oxetanyl and vinyloxyethyl, were prepared from commercially available 9-(2,3-epoxypropyl)carbazole. The kinetics of UV curing of the monomers was monitored by real-time FT-IR technique. The type of functionality was found to have a considerable influence on the photo-curing rate, but has not an evident effect on the final reactive group conversion. The cross-linked systems were found to have low glass transition temperatures ranging from 7 to 10 °C. Electron photoemission spectroscopy revealed ionization potentials of 5.75–5.8 eV for the thin cross-linked layers of the monomers.