偶氮无定形分子材料的合成与表征

小的有机分子在室温以上能形成稳定的无定形玻璃态称为无定形分子材料(amorphousmolecular materials)[1].无定形分子材料有着有机小分子的结构,却具备聚合物的特殊性能,如具有玻璃态,可旋涂成膜等,因此这一类特殊材料引起了人们极大的研究兴趣[1~4].与晶态、液晶态等相态相比,     

芳香─脂肪族共聚酰胺的序列结构和溶致液晶性能

本文利用对苯二甲酰氯（ＴＰＣ），对苯二胺（ＰＰＤ）和亚甲基数为２和６的两种脂肪族二无胺（ＡＤＡ）合成了具有不同序列结构的芳香－脂肪族共聚酰胺。研究了共了聚酰胺的序列结构参数－无规度Ｂ和数均序列长度Ｌｎ与液晶临界浓度Ｃ＊和中介相的类型之间的关系。     

有机光伏材料与器件研究的新进展

近几年有机光伏电池应用研究发展迅猛。本文综述了有机光伏薄膜电池在材料(包括有机小分子材料与聚合物材料)、器件构造方面的最新进展，分析了有机聚合物光伏电池目前效率低的主要原因，并探讨了该领域进一步研究的方向和前景。     

EFFECT OF SEQUENCE STRUCTURE ON THE THERMOTROPIC LIQUID CRYSTALLINE PROPERTIES OF POLYESTERAMIDES BASED ON DIMETHYLBENZIDINE, BISPHENOL-A AND ρ-TEREPHTHALYL CHLORIDE*

A series of thermotropic liquid crystalline polyesteramides with differ-ent sequence structure based on dimethylbenzidine (DMBD), bisphenol-A(BPA) and p-terephthalyl chloride (TPC) was synthesized by changing the feeding order of monomers inlow temperature solution polycondensation system. By means of NMR and a computer pro-gram the sequence structure parameters were measured. The effect of sequence structureon liquid crystalline phase transition temperature of PEAs obtained was investigated.     

超支化偶氮大分子重氮盐静电层-层自组装膜的制备及光响应性研究

利用超支化偶氮大分子重氮盐作为聚阳离子,与聚阴离子PSSA进行静电层-层自组装,通过紫外光谱、椭偏仪和原子力显微镜等对体系自组装过程及自组装膜的表面形貌进行了表征.在线偏振488nmAr+激光的作用下,自组装多层膜可产生明显的光致二向色性,其取向有序度约为0.02.在干涉的Ar+激光作用下,多层膜表面可形成规则的表面起伏光栅结构.     

THEORY OF INTRAMOLECULAR ORIENTATIONAL ORDER OF MESOGENIC UNITS IN MC-LCPS AND ITS APPLICATION

New concepts such as intramolecular orientational order parameter and corresponding model as well as theory were proposed to describe the intramolecular orientation of mesogenic units in the liquid crystalline polymer chains. The relationship between the intramolecular orientational order parameter and the molecular geometrical parameters such as the bond angle, the bond rotational angle and the rotational potential energy of chemical bonds was deduced. A significant even-odd oscillation of the intramolecular orientational order parameter of LCPs with different length of flexible spacer was found and rationally related to even-odd zig-zag manner of transition properties The verification and application of the theory are also discussed. The isotropic transition temperature predicted by the theory is shown to be in favourable agreement with the experiments.     

新型聚氨酯基液晶光定向层材料的合成与性能研究

设计并合成了一种新的二醇单体 5 羟基 1 ,3 间苯二甲酸二 (2 羟基 )乙酯 [Di(2 hydroxyethyl) 5 hydroxylisophthalate,DHHI],并用各种手段对其进行了表征 .DHHI与二苯基甲烷 4 ,4′ 二异氰酸酯 (MDI)溶液聚合得到一种侧链含有酚羟基的先驱聚合物PU OH ,通过肉桂酰氯的功能化反应制备出新型光敏聚氨酯 (PU CI) .用示差扫描量热分析 (DSC) ,红外光谱 (FT IR) ,紫外可见光谱 (UV Vis)等对PU CI进行了表征 .研究表明 ,PU CI在紫外光的照射下可发生环 (2 +2 )加成反应 .PU CI经线性偏振光聚合技术 (LPP)处理制成液晶光定向层 ,采用向列型液晶 5CB组装成液晶盒 ,在偏光显微镜下可以观察到均匀的液晶取向 ,表明该聚合物膜具有很好的液晶定向能力 ,是一类具有潜在应用价值的新型液晶光定向层材料     

STUDY ON THE PHASE TRANSITION KINETICS OF THERMOTROPIC LIQUID CRYSTALLINE AROMATIC-ALIPHATIC COPOLYESTER

The phase transition kinetics of thennotropic liquid crystalline aromatic-aliphatic regular copolyester: were studied by DSC. By means of Kissinger's method the kinetic equation and parameters including activation energy, rate order and preexponential factor for phase transition from nematic to isotropic were obtained. The activation energy from crystal to nematic was also presented.     

Morphology study of a series of azobenzene-containing side-on liquid crystalline triblock copolymers

A series of azobenzene containing side-on liquid crystalline ABA triblock copolymers were investigated.This triblock series possesses the same central liquid crystal block B and various lengths of the amorphous block A.Transmission electron microscopy(TEM),small angle X-rays and neutron scattering(SAXS and SANS) were used to study their morphologies.After annealing the samples over weeks at a temperature within the nematic temperature range of block B, different morphologies(disordered,lamellar,perforated layer and hexagonal cylinder) were observed by TEM.The alignment behavior of these azo triblock copolymers in the magnetic field for artificial muscle application,as well as the phase period and the order-disorder transition(ODT) were studied in situ by SANS.     

聚苯乙烯重氮盐的单组分逐层自组装研究

利用聚苯乙烯重氮盐(PS-DAS),通过单组分逐层自组装,得到了厚度可控的超薄膜.采用紫外可见光谱,椭偏仪,原子力显微镜等对自组装膜的增长和表面形貌进行了表征,并对其交联前后的性质进行了研究.结果表明,利用逐层自组装步骤可以制备膜厚均匀增长的PS-DAS膜.组装过程中的吹干步骤对自组装膜的增长起重要作用.在加热条件下,超薄膜可以发生交联反应,得到疏水的表面。