PA6/SANMAH/GF复合材料的制备及其性能研究

采用双螺杆挤出机通过熔融共混制备了尼龙6／（苯乙烯／丙烯腈／顺丁烯二酸酐）共聚物／玻璃纤维（PA6／SANMAH／GF）复合材料，测试了材料的拉伸强度、弯曲强度、弯曲弹性模量、缺口冲击强度、热变形温度、吸水率、熔点和熔融焓，并与GF增强PA6（PA6／GF）复合材料和GF增强PA6／（苯乙烯／丙烯腈）共聚物（PA6／SAN／GF）复合材料进行了性能对比。结果表明，在PA6与SANMAH的质量比为100：3—30时，PA6／SANMAH／GF复合材料的拉伸强度与PA6／GF复合材料相当，但高于PA6／SAN／GF复合材料，弯曲强度和弯曲弹性模量高于PA6／GF和PA6／SAN／GF复合材料．缺口冲击强度高于PA6／GF复合材料，但低于PA6／SAN／GF复合材料；在PA6与SANMAH的质量比为100：40时，PA6／SANMAH／GF复合材料的拉伸强度、弯曲强度和缺口冲击强度明显降低；在整个试验范围内，PA6／SANMAH／GF复合材料的热变形温度比PA6／GF和PA6／SAN／GF复合材料低4～7℃；吸水率随着SAN-MAH用量的增加而逐渐减小。     

环保型水处理药剂的合成与性能研究

本文首先分别合成了聚天冬氨酸和丙烯酸-丙烯酸酯共聚物，并对其性能进行评定，然后以聚天冬氨酸为主体，通过与聚丙烯酸类阻垢分散剂和磷系阻垢缓蚀剂的复配，开发出一种低磷、可部分生物降解的新型阻垢缓蚀剂，并对其性能进行了综合评定，表明该药剂具有优良的阻垢缓蚀性能，适合用在高温、高硬度、高浓缩倍数的循环冷却水系统。     

两亲8-氨基喹啉配体的合成、表征及其光谱性质

设计合成了以8-氨基喹啉为亲水头基的两亲配体：2-十六烷基丙二酸二(8-氨基喹啉)酰胺(H2A)。通过元素分析、红外光谱、核磁共振、荧光和UV-Vis光谱表征鉴定了这个化合物。在UV-Vis光谱中，H2A的吸收峰随溶剂极性的增大而紫移，F(n，ε)函数(ε为溶剂的介电常数，n为折射率)对H2A吸收带频率具有线性关系。H2A在室温、中性条件下具有荧光现象，Zn^2 离子使H2A的荧光强度稍有增加，而Cu^2 离子对H2A的荧光具有强的淬灭作用。H2A及其LB膜可被用作电致发光器件的发光层。     

PP/PVC/PP-g-(St-co-MMA)的形态结构

以苯乙烯一甲基丙烯酸甲酯共聚物接枝聚丙烯[PP—g-（St—co—MMA）]为相容剂，利用扫描电子显微镜（SEM）和x射线能谱仪（EDS）对PP／PVC／PP—g-（St—co-MMA）的形态结构进行了研究。由x射线能谱微区分析得到了共混物中氯元素面分布图，对氯元素面分布进行了粒径统计。结果表明，在PP／PVC中加入PP-g-（St—co—MMA）相容剂，共混物亚微观相形态结构发生了变化。PP—g-（St—co—MMA）能够明显降低PP／PVC共混物中PVC分散相的分散尺寸，提高共混物两相之间的相容性。改变相容剂的用量和共混物的组成，都对体系的形态结构产生影响。     

低磷共聚物对黄铜的缓蚀作用

采用失重法、能量散射X-射线、电化学方法，研究了自制低磷共聚物在配制冷却水中对黄铜的缓蚀作用，分析了空白实验和加入低磷共聚物后黄铜试片的表面元素组成，探讨了低磷共聚物的缓蚀机理。结果表明，低磷共聚物在黄铜试片表面活性位置吸附抑制了阳极电化学过程。     

Synthesis and characterization of poly(ϵ‐caprolactone)‐b‐poly(ethylene glycol) block copolymers prepared by a salicylaldimine‐aluminum complex

A series of poly(?‐caprolactone)‐b‐poly(ethylene glycol) (PCL‐b‐PEG) block copolymers with different molecular weights were synthesized with a salicylaldimine‐aluminum complex in the presence of monomethoxy poly(ethylene glycol). The block copolymers were characterized by ¹H NMR, GPC, WAXD, and DSC. The ¹H NMR and GPC results verify the block structure and narrow molecular weight distribution of the block copolymers. WAXD and DSC results show that crystallization behavior of the block copolymers varies with the composition. When the PCL block is extremely short, only the PEG block is crystallizable. With further increase in the length of the PCL block, both blocks can crystallize. The PCL crystallizes prior to the PEG block and has a stronger suppression effect on crystallization of the PEG block, while the PEG block only exerts a relatively weak adverse effect on crystallization of the PCL block. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007     

基团转移聚合反应中的有机硅引发剂

评述了近年来基团转移聚合反应中几种常用的有机硅引发剂(如单官能团引发剂、双官能团引发剂、其它乙烯酮硅烷缩醛引发剂、大分子引发剂及其它含硅引发剂)的研究进展,并展望了基团转移聚合反应在高分子合成中的重要作用及应用前景。     

Correlation between crystallization kinetics and melt phase behavior of crystalline-amorphous block copolymer/homopolymer blends

We show that the phase behavior of the strongly segregated blend consisting of a crystalline-amorphous diblock copolymer (C-b-A) and an amorphous homopolymer (h-A), which depends on the degree of wetting of A blocks by h-A, can be probed by the crystallization kinetics of the C block. A lamellae-forming poly(ethylene oxide)-block-polybutadiene (PEO-b-PB) was blended with PB homopolymers (h-PB) of different molecular weights to yield the blends exhibiting ‘wet brush’, ‘partially dry brush’, and ‘dry brush’ phase behavior in the melt state. The crystallization rate of the PEO blocks upon subsequent cooling, as manifested by the freezing (crystallization) temperature (T_f), was highly sensitive to the morphology and spatial connectivity of the microdomains governed by the degree of wetting of PB blocks. As the weight fraction of h-PB reached 0.48, for instance, T_f experienced an abrupt rise as the system entered from the wet-brush to the dry-brush regime, because the crystallization in the PEO cylindrical domains in the former required very large undercooling due to a homogeneous nucleation-controlled mechanism while the process could occur at the normal undercooling in the latter since PEO domains retained lamellar identity with extended spatial connectivity. Our results demonstrate that as long as the C block is present as the minor constituent the melt phase behavior of C-b-A/h-A blends can also be probed using a simple cooling experiment operated under differential scanning calorimetry (DSC).     

聚氨酯-丙烯酸酯的前端自由基聚合

由甲苯二异氰酸酯（TDI）、聚醚二元醇（N210、220）、丙烯酸-2-羟丙酯（HPA）制得端烯基聚氨酯-丙烯酸酯大分子;然后通过前端自由基聚合;制备了聚氨酯-丙烯酸酯共聚物。研究了引发剂浓度对前端速度和温度分布的影响。FTIR显示前端聚合产物与间歇聚合产物有相似的红外吸收;TGA分析表明;前端聚合产物具有更好的热稳定性。     

三元乙丙橡胶－甲基丙烯酸甲酯溶胀机械接枝共聚研究

采用直接溶胀法，在叶片混合器中以不同条件制备了三元乙丙橡胶－甲基丙烯酸甲酯接枝共聚物。通过动态力学粘弹谱表征，该接枝共聚物具有稳定的双相体系相态。在适宜条件下，可以制得较好综合性能的接枝共聚物。