聚苯硫醚砜酮共聚物的常压合成与表征

采用4,4’-二氯二苯砜和4,4’-二氟二苯甲酮及精制工业硫化钠为反应单体,采用分批投料、逐步聚合的方式,在N-甲基吡咯烷酮中进行常压缩聚．合成了线型高分子量的聚苯硫醚砜酮共聚物（PPSS／K）,考察了不同反应条件对分子量的影响;并用红外、紫外光谱对聚合物结构进行了表征．用TG等手段对聚合物热性能进行了表征,发现该聚合物的玻璃化温度丁。随着酮含量的增加而降低、热稳定性随着酮含量的增加而增加;结果表明,合成的树脂为线型高分子量的PPSS／K树脂,具有优良的热性能。     

聚苯硫醚酮酮的合成及其表征

以１，４－二（４’－氟代苯甲酰基）苯和硫化钠为原料，在极性有机溶剂中常压下合成了聚苯硫醚酮酮。用元素分析、红外光谱、核磁共振谱、Ｘ射线衍射以及热分析等方法对聚合物进行了表征，并测定了聚合物的溶液粘度。结果表明，聚苯硫醚酮酮是一种高熔点、高热稳定性的结晶性聚合物。     

PPSK／PPS共聚物的合成及其初步研究

用４，４＾’－二氟苯酮、１，４－二氯苯和硫化钠为原料，常压下采用分开预聚和共预聚两种不同的预聚方式，合成了聚苯硫醚酮－聚苯硫醚共聚物。用红外光谱、Ｘ射线衍射、差示热扫描和热失重分析等手段，对共聚物进行了初步表征。结果表明，不同配比的共聚物均为结晶性高聚物，并且具有良好较好的耐热性能，对于可溶性的共聚物还测定了其对数比浓粘度。     

聚醚酮酮/聚醚酮醚酮酮无规共聚物的合成与表征

以二苯醚,４,４‘－二苯氧基二苯甲酮,对－苯二甲酰氯和间－苯二甲酰氯为单体,在无水三氯化铝存在下,通过低温溶液缩聚合成了一系列聚醚酮酮／聚醚酮醚酮酮无规共聚物。经ＩＲ,ＷＡＸＤ,ＤＳＣ,ＴＧ及耐溶剂抗化学腐蚀试验等方法研究表明,共聚物的对数比浓粘度随４,４’－二苯氧基二苯甲酮含量的增加而增大;共聚物是半结晶性能聚合物,具有比聚醚酮酮更高的玻璃化学转变温度,而其热分解温度和耐溶剂抗化学腐性能则与聚醚     

聚醚酮酮/含萘环聚醚酮醚酮酮无规共聚物的合成与表征

在无水AlCl3和NMP存在下,通过对苯二甲酰氯(TPC)、二莘醚(DPE)和4,4’-双(α-萘氧基)二苯酮(DNBP)在1,2-二氯乙烷中的低温溶液共缩聚反应。合成了一系列聚醚酮酮／含萘环聚醚嗣醚酮酮无规共聚物。并用IR、DSC、TGA和WAXD等方法对其结构和性能进行了表征和测试。研究结果表明,随着共聚物中DNBP含量的增加,其玻璃化转变温度(Tg)逐渐升高,而熔融温度(Tm)则逐渐降低。当共聚物中DNBP含量为10mol％～30mol％时,共聚物与PEKK相似为半结晶型聚合物,具有优异的耐热性能和抗溶剂对化学腐蚀性能。     

含联苯聚芳醚砜醚酮酮无规共聚物的合成与表征

以新合成的含联苯芳醚单体4,4'-二(4-联苯氧基)二苯砜(BBPOPS)与4,4'-二-苯氧基二苯砜(DPODPS)、对苯二甲酰氯(TPC)为单体,以路易斯酸无水三氯化铝(AlCl3)为催化剂进行三元共缩聚,制备了大分子主链含联苯结构的聚芳醚砜醚酮酮(PESEKK)无规共聚物.通过核磁共振仪、红外光谱仪、差示扫描量热...     

聚苯硫醚酰胺的合成与表征

用4-氯苯甲酰4′-氯苯胺和硫化钠为原料在常压下合成了聚苯硫醚酰胺,并对其进行了表征。结果表明所合成的产物为结晶性聚合物,并且有较高的热稳定性。     

一氧化碳和苯乙烯交替共聚物的合成与表征

利用乙酸钯和２，２′－联吡啶组成的催化剂体系催化一氧化碳和苯乙烯交替共聚合成出聚（１－氧代－２－苯基丙撑）（ＳＴＣＯ）。采用ＩＲ、ＮＭＲ、元素分析以及广角Ｘ光散射对该聚合物以表征。该共聚物晶体为单斜晶胞，晶胞参数为ａ＝１５．７×１０－１０ｍ，ｂ＝６．１７×１０－１０ｍ，ｃ＝７．４５×１０－１０ｍ，α＝９０．０°，β＝１０４．３°，γ＝９０．０°；晶胞体积为６９７．２×１０－３０ｍ３；空间点群为Ｐ２１／ｃ。此外，对该共聚物热降解进行了初步研究。     

聚苯硫醚—聚醚砜嵌段共聚物的红外光谱分析

对实验室合成的聚苯硫醚（ＰＰＳ）－聚醚砜ＰＥＳ）嵌段共聚物的结构进行了红外表征，建立用傅地红外光谱对共聚物组成进行定量分析的方法。发现共聚物中ＰＥＳ的含量随投料经中ＰＥＳ的含量增加而增加，但小于投料中ＰＥＳ含量。     

苯乙烯-马来酸酐无规共聚物的合成及表征

苯乙烯-马来酸酐无规共聚物(R-SMA树脂)具有良好的耐热性，较低的熔体粘度，优异的加工性能，能与多种高分子材料进行共混．本文以过氧化二苯甲酰(BPO)为引发剂，环己酮为溶剂，采用溶液聚合法制备了R-SMA树脂。讨论了加料方式对聚合物结构的影响、组成与流动性能的关系．并用^13C-NMR、IR对产物进行了表征。     

聚芳硫醚砜二茂铁酰胺酰胺的合成及表征

通过合成一种含二硫醚键的二胺及二茂铁二甲酰氯,将这两种单体进行低温溶液缩聚,合成出了聚芳硫醚二茂铁酰胺酰胺(FC-PASAA),通过红外、核磁证实了其化学结构,用DSC、TG等手段对FC-PASAA的热性能进行了表征,结果表明聚合物具有优良的热性能,通过X射线衍射表明FC-PASAA为无定形聚合物,溶解性试验表明FC-PASAA能溶解于DMF、DMSO、NMP等极性非质子溶剂,通过流延法制得了分离膜,其纯水通量为13.5～57.8L/m2.h。     

Synthesis and characterization of nitrated and aminated poly(phenylene sulfide) derivatives for advanced applications

Nitrated and aminated poly(phenylene sulfide) (PPS) derivatives with different extent of modification were synthesized in a one-pot reaction in suspension. Their substitution degree was determined from both elemental analysis and TGA curves. FT-IR and NMR spectra demonstrated the effectiveness of the functionalization reactions, showing the appearance of bands related to the substituent groups. A progressive reduction in thermal stability was observed as the number of functional groups increased. Aminated derivatives were thermally less stable and exhibited higher solubility in aprotic polar solvents than the corresponding nitrated polymers. DSC thermograms revealed a diminution in the crystallization temperature and a rise in the glass transition with increasing functionalization degree, since the presence of substituent groups inhibits the rotation of consecutive elements of the polymer chain. The level of crystallinity decreased upon increasing chain modification, as evidenced from X-ray diffractograms. The steric hindrance of the substituents disrupts the chain packing, leading to smaller crystals. These derivatives are expected to have applications in electromembranes and as matrix materials for the fabrication of high-performance composites suitable for structural and non-structural components.     

聚芳硫醚酮酰胺树脂的合成与表征

通过合成4,4'-二苯基硫醚二甲酰氯(TDC),将其与4,4-'(对胺基笨基硫醚)二苯甲酮(BAPK)进行低温溶液缩聚,制备了聚芳硫醚酮酰胺(PASKA),通过红外、核磁、元素分析证实了其化学结构;采用DSC,TGA等手段对PASKA的热性能进行了表征,结果表明PASKA具有优良的热性能,同时表明它为无定形聚合物;溶解...     

常压法间位聚芳硫醚酰胺酰胺的合成及表征

通过合成一种新的含二酰胺键的单体,将其与硫化钠进行常压溶液缩聚,合成出了间位聚芳硫醚酰胺酰胺(m-PPSAA),通过红外、核磁证实了其化学结构,用DSC、TG等手段对m-PPSAA的热性能进行了表征,结果表明聚合物具有优良的热性能,通过X射线衍射表明m-PPSAA为结晶型聚合物,通过溶解性试验表明m-PPSAA能溶解于DMF、DMSO、NMP等溶剂,比PPS的溶解性好.     

New anthracene-based semi-conducting polymer analogue of poly(phenylene sulfide): Synthesis and photophysical properties

A new anthracene-based polymer analogue of poly(phenylene sulfide) has been synthesized via Wittig polycondensation. The polymer is soluble and shows a good film quality. This organic material showed an amorphous behavior with a T_g of 70 °C. The absorption and fluorescence properties of the polymer were investigated. The HOMO/LUMO energy levels were estimated by cyclic voltammetry measurements. The PAnS thin film exhibits an optical gap of 2.56 eV and emits in orange region. The fluorescence quantum efficiency in dilute solution of PAnS was of 66%. A PAnS-based single-layer diode has been fabricated and shows relatively low turn-on voltage of 4.8 V.     

聚苯硫醚砜膜聚集态结构的研究

采用X射线衍射法及激光散射法研究了聚苯硫醚砜(PPSS)膜的聚集态结构,两种方法都得到了一致的结论未经处理的PPSS的样品呈非晶态;经过适当的温度退火处理后,其聚集态结构形成一些次级的有序结构.     

Synthesis and characterization of novel photoactive poly(arylene ether ketone) with azobenzene pendants

A novel azobenzene-functionalized poly(arylene ether ketone) (azo-PAEK) with azo moieties on the pendants was prepared by post-esterification reaction of acid-containing poly(arylene ether ketone) (acid-PAEK) with 4-((4-nitrophenyl)diazenyl)phenol (NAP). DSC and TGA measurements indicate the azo-PAEK has high glass transition temperature of 152 °C and good thermal stability with 5% weight loss at 319 °C. Irradiated by 360 nm UV light, the azo-PAEK shows a significant photoisomerization effect. Under the illumination of linearly polarized laser beam, significant surface-relief-gratings (SRGs) with the surface modulation depth of 37 nm were fabricated rapidly on the azo-PAEK film.     

Vapor grown carbon fiber composites with epoxy and poly(phenylene sulfide) matrices

Vapor grown carbon fibers (VGCF, Pyrograf III™ from Applied Sciences, Inc.), with 100–300 nm diameters and ∽10–100 μm lengths, were formulated in various fiber volume fractions into epoxy (thermoset) and into poly(phenylene sulfide) (thermoplastic) composites. Increases in stiffness were observed as with previous VGCF/organic matrix composites. Large increases in flexural strengths were achieved in both systems demonstrating for the first time that discontinuous randomly oriented Pyrograf III™ can give strength increases and has substantial potential as a reinforcement in composites. Here-to-fore, addition of VGCF caused strength decreases. Voids, residual thermal strains (as the fiber surface area is ∽35 times greater than 7 μm-diameter PAN fiber), or uncertainties about fiber strength, fiber–matrix bonding and the degree of fiber dispersion, could cause losses of strength. Thermal conductivity properties of VGCF/ABS (acrylonitrile–butadiene–styrene from GE Plastics) and VGCF/epoxy composites with various fiber volume fractions were measured. Thermal conductivity increased with an increase in fiber volume fraction. However, these increases were not significant enough to make these VGCF fiber/organic matrix composites candidates for thermally conductive materials.     

New semi-conducting poly(phenylene vinylene-alt-anthrylene vinylene)s: Synthesis,characterization and photophysical properties

An anthracene-based semi-conducting polymer (P1) and its cyano-analogue (P2) were synthesized via the Wittig and Knoevenagel polycondensations. The polymers were soluble in common organic solvents and have number-average molecular weights of 13,750 and 6430 g mol⁻¹ for P1 and P2, respectively. The DSC analyzes show a good thermal stability and an amorphous morphology in solid state for these organic materials. The optical properties of the polymers were investigated by UV–visible absorption and fluorescence spectroscopies. The HOMO and LUMO levels were estimated using cyclic voltammetry analysis. The effect of cyano group on the photophysical properties of poly(phenylene vinylene-alt-anthrylene vinylene)s was investigated. The results demonstrate an enhancement in the ionization potential and a significant improvement of the fluorescence yield due to introduction of such groups into the π-conjugated system. Single-layer diodes based on these organic semiconductors have been fabricated and showed relatively low turn-on voltages.     

含氰侧基联苯型聚芳醚醚酮酮/芳醚醚酮酮共聚物的合成与表征

在无水AlCl3及N-甲基吡咯烷酮(NMP)/1,2-二氯乙烷(DCE)复合溶剂的存在下,将2,6-二苯氧基苯甲腈(DPOBN)与4,4’-二氯甲酰基联苯(BClBP)及对苯二甲酰氯(TPC)进行三元低温共缩聚反应,合成了一系列含氰侧基联苯型聚芳醚醚酮酮/芳醚醚酮酮共聚物。用IR、DSC、TG、WAXD及元素分析等方法对其结构和性能进行了表征。结果表明,所合成的聚合物具有预期结构且均为非晶态聚合物;其玻璃化转变温(Tg)度为180~196℃,在N2气氛中热分解5%的温度(Td)为495~508℃,具有突出的耐高温性能。