硅橡胶／EPDM／ⅡR共混的研究

研究了硅橡胶/三元乙丙橡胶/丁基橡胶的共混技术与硫化体系。对增容剂、共混比例等对共混胶的力学性能的影响进行了探讨。KH570适宜于作为共混增容剂;共混胶宜于采用DCP硫化,也可以采用硫黄硫化,随着丁基橡胶含量的增加,其力学性能有大幅度提高,并出现最佳值点。     

聚乳酸基三元共混物的热处理

采用3种热处理过程对聚乳酸(PLA)、聚(己二酸-对苯二甲酸丁二酯)(PBAT)和聚丙撑碳酸酯(PPC)的共混物进行了热处理。采用广角X射线衍射仪、差示扫描量热仪、偏光显微镜和扫描电子显微镜等对共混物进行了表征,研究了热处理过程对共混物结构和性能的影响。结果表明:退火处理促进了共混物中PLA的结晶,提高了共混物的水蒸气阻隔性;先淬火再退火相对于直接退火处理,共混物的水蒸气阻隔性较好。     

聚氨酯/苯乙烯-马来酸酐无规共聚物反应性共混

采用反应性共混法合成聚氨酯／苯乙烯－马来酸酐无规共聚物共混物,用红外光谱,扫描电子显微镜研究了共混物的形态结构,并对共混物的性能进行了研究。     

热塑性弹性体SBS与聚丙烯的共混

本文作者采用二阶共混模式制备了SBS-聚丙烯共混物。并对共混物形态,物理—机械性能以及加工性能进行了研究。试制表明该共混物具有工业生产价值。     

聚乙二醇共混体系的研究进展

综述了近年来聚乙二醇（PEG）共混改性体系的研究进展以及应用情况,对其发展前景进行了展望。PEG与高分子材料混容性好,是应用很广的共混改性材料。PEG共混材料大多采用溶液共混法、熔融共混法和化学交联法制备。采用PEG共混改性其他材料一方面可改善脆性,提高抗冲击性能,另一方面也可提高材料的亲水性和水溶性。     

苯并恶嗪改性酚醛树脂模塑料的研究

合成了单环苯并恶嗪树脂(BZ),利用不同的维纶短纤维对苯并恶嗪/酚醛树脂(PF)共混体系进行增强.采用傅立叶红外光谱、核磁共振对BZ的结构进行了表征,采用差示扫描量热研究了共混体系的固化行为,并对模塑料的力学性能、热性能等进行了研究.结果表明,PF降低了BZ的固化温度,共混树脂体系具有良好的工艺性,共混树脂体系各项性能...     

新型共聚芳醚砜改性环氧树脂的结构与性能研究

采用新型杂萘联苯共聚芳醚砜(PPBES)树脂对环氧树脂(EP)进行共混改性,研究了共混物的结构和性能,并对其增韧机理进行了分析。结果表明:采用PPBES改性EP后,在共混物韧性提高的同时,其玻璃化温度最多提高了30℃,且热稳定性得到了很好的保持。     

增容剂含量对PP／EVOH共混物流变性能的影响

采用熔融共混法制备了聚丙烯／乙烯-乙烯醇共聚物（PP／EVOH）共混物,利用毛细管流变仪对共混物的流变行为进行了研究。结果表明：PP／EVOH共混物为假塑性流体,呈现出切力变稀的现象。马来酸酐接枝乙烯-辛烯共聚物（POE-g-MAH）的加入增大了PP／EVOH共混物的粘流活化能,说明共混物对温度的敏感性较强。     

羧基丁腈橡胶/明胶共混物的制备及其亲水性和吸湿性

采用羧基丁腈胶乳与明胶溶液共混制备了羧基丁腈橡胶(XNBR)/明胶共混物,对其结构进行了表征,考察了明胶加入量对共混物亲水性和吸湿性的影响.结果表明,XNBR的羧基与明胶的氨基之间发生了反应.明胶的加入使共混物的亲水性和吸湿性得到明显改善,且随明胶加入量的增大,共混物的亲水性和吸湿性提高;模拟生理溶液体系的pH值对共混...     

偶联剂对PVC/EPDM共混体系微观结构及机理的影响

采用巯基化合物作为聚氯乙烯(PVC)和三元乙丙橡胶(EPDM)的共混体系的偶联剂。用机械共混法制样,研究了偶联剂对PVC/EPDM体系的力学性能及形态结构的影响,并借助于透射电子显微镜获得清晰的共混物的多相结构照片,对共混物的结构与性能之间的关系进行了研究。采用动态粘弹谱仪,研究了偶联剂对共混物动态温度谱的影响,证实了共混体系有两相存在。并在此基础上提出含有偶联剂的共混体系的增韧机理。开辟了一条极性与非极性共混体系的新途径。     

低粘度酚醛改性胺环氧固化剂的性能研究

采用非等温DSC法对自制的低粘度酚醛改性胺固化剂与环氧树脂的固化反应工艺参数进行了推导,并通过测试体系的固化度加以验证。固化物采用红外光谱进行了表征,同时测定了浇注体的力学性能、热性能(TG),并通过扫描电镜(SEM)对拉伸断裂面的表面形貌进行了观察。结果表明:环氧树脂E-51与自制固化剂的质量比为100∶35,固化工艺条件为常温/24 h+80℃/2 h时,体系力学性能最佳,拉伸强度55.2 MPa、弯曲强度92.8 MPa、压缩强度83.0 MPa,断裂伸长率2.2%,Tg达到280.3℃。该固化剂粘度低、耐热性好、具有很好的柔韧性,可用于建筑结构胶。     

Novel Organometallic Aromatic Azo Polyesters Based on Ferrocene

Some ferrocene containing aromatic azo polyesters were prepared by condensing 1,1-ferrocenedicarbonyl chloride with different azo groups containing aromatic diols, which were synthesized by diazotization coupling reaction from aromatic diamines. The polymeric products were separated as two portions on the basis of their solubility and subsequently characterized by their elemental analysis and FTIR spectral studies. Thermal properties of the products were measured by differential scanning calorimetry and thermogravimetry and the activation energies of pyrolysis were calculated using Horowitz and Metzger's method. The molecular weights of the soluble portions were determined by gel permeation chromatography (GPC) and these portions were also characterized by their inherent viscosities and UV-Vis spectroscopic studies.     

超细CaCO3／PP复合纤维的制备和亲水行为研究

通过共混包粘一熔融纺丝法制备超细CaCO3／PP复合纤维,对复合纤维的亲水性能和力学性能进行了研究,通过接触角测量法研究超细CaCO3／PP复合纤维表面能参数的变化,并用FTIR和SEM对纤维结构和表面形态进行分析,结果表明,超细碳酸钙填充改性可使PP纤维接触角降低76．6％,表面能、粘附功、极化度和积极性分量显著提高。FTIR和SEM测试表明,复合纤维表面极性基团的形成和表面形态粗糙化对PP复合纤维亲水性能的改善有重要作用,且在超细CaCO3含量为6％（w）时,纤维性能最佳,断裂强度提高24．07％,模量提高38．40％,接触角下降57％。     

Simultaneous brightness contrast with three different stimuli: 2D, 3D,and D-up

In this study, simultaneous brightness contrast was investigated using three different devices: 2D (paper), 3D (space), and D-up. The paper stimuli were made by printing papers, the space stimuli were produced by illumination in a two-rooms experimental booth, and the D-up stimuli were shown to subjects using a D-up viewer. The brightness of test patches was judged by the amounts of whiteness and blackness. The results were different among the devices; however, if the whiteness of the test patches was plotted for the luminance contrast of the test patch versus the surround, all the data points were expressed by nonlinear equations. Data from the space stimuli were expressed by only one equation; those from the paper stimuli were also expressed by the nonlinear equation but with different coefficients for each test patch. The results from D-up were between those of the space and paper experiments. All the results were explained in relation to the hypothesized illuminated space over the surrounds. The difference among devices was explained by the whiteness of the surround being transferred to the illumination.     

磁性活性炭的制备与表征

探讨了负压浸渍法制备磁性活性炭的浸渍条件,浸渍溶液为油酸修饰的Fe3O4磁性凝胶均匀分散在正己烷溶剂中形成的磁性溶液. 通过对油酸修饰的磁性凝胶进行差热、热重和微热容分析确立了浸渍产物的热处理条件,考察了磁性溶液浓度、浸渍时间、浸渍温度对浸渍产物的影响,并采用X射线衍射对磁性活性炭的组份和结构进行了表征,采用磁强计测定了磁性活性炭的磁性能,用比表面、孔容测试技术比较了活性炭和磁性活性炭的比表面、孔体积和孔分布.     

不同企业生产的HIV抗体确认试剂检测结果的比较

目的比较3家不同企业生产的HIV抗体确认试剂的检测结果。方法分别应用3家不同企业生产的HIV抗体确认试剂,检测64份经多家HIV抗体酶联免疫试剂检测不一致的样本,比较检测结果的差异,并对不确定样本的常见非特异性条带进行分析。结果 3家不同企业生产的HIV抗体确认试剂检测64份样本均为阴性或不确定,但各试剂检测为阴性和不确定样本的比例差别较大,INNO-LIATMHIVI/ⅡScore与NEWLAVBLOT1试剂、INNO-LIATMHIVⅠ/ⅡScore与HIVBLOT2.2试剂及NEWLAVBLOT1与HIVBLOT2.2试剂检测结果的符合率分别为57.8%、28.1%和48.4%,且每两家试剂检测结果之间差异均有统计学意义(P均<0.01)。最易产生不确定结果的条带主要集中在p24和p17上。结论 HIV抗体确认试剂质量差别较大,应加强其质量控制并规范检测标准。     

纳米MoS2的制备及其与聚吡咯物复合膜光学性能的研究

以有机热溶剂法制备MoS2,并以XRD对其结构进行表征.TEM形貌观察表明晶粒具有纳米尺寸。以电化方法在ITO导电玻璃基体上制备聚合物聚吡咯薄膜。在导电聚合物膜上涂布纳米MoS2晶体,荧光分析发现其荧光光谱相对于聚合物膜有一定程度的红移。Z-Scan测试其折射率的结果表明其具有非线性光学特性。     

有机溶剂热生长技术制备硫族化合物及其光学特性的研究

以有机溶剂热生长技术(solvothermaltechnique)制备了半导体硫族化合物(CdS、ZnS、MoS2)等纳米颗粒,采用XRD、TEM等技术对其结构进行表征.以ITO导电玻璃以及导电聚合物(PANI、PPY)膜为基底,将纳米颗粒涂布其上并以PL法研究其光学特性,实验结果表明:经修饰后,材料的荧光发射位置发生显著的变化.     

Synthesis,Characterization, and Glass Reinforcement of Flame Retardant Acrylated Poly(Ester-Amide) and Flame Retardant Poly(Ester-Imide) Resins Based on Brominated Epoxy Resin

Bisphthalamic acids were prepared by reaction of phthalic anhydride and aliphatic diamines. Flame retardant poly(ester-amide)s were prepared by reaction of brominated epoxy resin with bisphthalamic acids and post reaction was carried out with acryloyl chloride to obtained acrylated flame retardant poly(ester-amide) resins. Bismaleimides were prepared by reaction between aromatic diamines and maleic anhydride. Carboxy terminated bismaleimides were prepared by Michael addition reaction of bismaleimides and 4-amino benzoic acid. Flame retardant poly(ester-imide)s were prepared by reaction between carboxy terminated bismaleimides and brominated epoxy resin. All the obtained products were characterized and analyzed by making composites.     

非灌流法分离大鼠肝星形细胞及其鉴定

目的采用非灌流法分离大鼠肝星形细胞(Hepatic stellate cell,HSC),并进行鉴定。方法采用非灌流法结合酶消化法分离大鼠肝脏细胞,密度梯度离心进一步分离HSC,油红染色检测HSC胞质中的脂滴,免疫组化法检测细胞中α-平滑肌肌动蛋白(α-Smooth muscle actin,α-SMA)、结蛋白(Desmin)及神经胶质酸性蛋白(Glial fibrillary acidic protein,GFAP)的表达。结果非灌流法结合酶消化法可成功分离大鼠HSC;密度梯度离心纯化的HSC经油红染色,细胞核周围可见红色脂滴;该细胞中α-SMA、结蛋白及GFAP的免疫组化染色结果均呈阳性,细胞着色率可达90%以上。结论成功建立了大鼠HSC的非灌流分离模式,所获得的HSC纯度较高,该方法稳定简便,具有一定的推广应用价值。