二过碘酸合铜(Ⅲ)钾氧化还原引发丙烯酸甲酯在尼龙1010上接枝共聚合反应的研究

以二过碘酸含铜（Ⅲ）钾（简称Cu（Ⅲ））为氧化剂，尼龙1010自剂，组成氧化还原引发体系，于碱性介质中，在尼龙1010表面引发丙烯聚合反应．测定了各种因素对接枝参数的影响．X-射线衍射及表征，并探讨了引发机理．     

用自适应提升格式对信号精确重构

本文分析了几种自适应提升格式在信号精确重构中的应用 ,在其计算过程中 ,它们均无须考虑当前步骤之前的数据。并分析了它们的优缺点。最后 ,提出一种构造自适应提升格式的方法 ,通过计算表明 ,此方法能取得更好的效果     

尼龙1010球晶的熔融

本文利用偏光显微镜研究了尼龙1010等温结晶所生成的几类球晶的熔融现象,测得正环状球晶的熔点(T_m)为182℃,正放射球晶T_m=203℃;混合放射球晶T_m=202～205℃;暗负放射球晶T_m=204～210℃;亮负放射球晶T_m=205～210℃。利用Hoffman T_m-T_ε外推法测得其平衡熔点T_m~0=215℃。     

结晶聚合物的辐射效应 Ⅰ.γ-辐照尼龙1010的聚集态结构

本文通过WAXD和DSC等方法研究了γ-辐照尼龙1010聚集态结构的变化,结晶损伤和无定形化的过程。这些过程和结晶与非晶界面原子参与化学反应密切相关,结晶损伤从结晶表面开始,随着辐照剂量增加逐渐向结晶内伸展,直到完全无定形化。     

溶剂和添加剂对尼龙6鬃丝结构形态和道明性的脸响

The transparency of nylon 6 filaments is changed by spherulites formed by Solvent Induced Crystallization (SINC) in quenching bath. The long carbon chains in alkyl diamides additives can prevent Solvent (water) Induced Crystallization so that the transparency of nylon 6 filaments is improved. The nylon 6 filaments were examined by Scanning Electron Microscopy (SEM), Small-Angle Light-Scatting (SALS), polarized microscope, light transmission rate, contact angles and others.     

尼龙1010球晶的转化

本文利用偏光显微镜研究了尼龙1010球晶的转化。发现在降温过程中放射状球晶多转变成相同光性的环状球晶。升温时正环状转化为正放射状球晶;正、混合放射球晶部分转化为负放射状球晶;黄蓝两瓣球晶在一定温度范围内可与负放射球晶相互转变。多种球晶共存时,混合放射球晶可转变成两瓣、不对称四瓣和六瓣形放射球晶;正、混合坏状分别转变成不对称四瓣和六瓣形环状球晶;最后都以环状球晶熔化。     

国家自然科学基金资助课题

 本文叙述了在聚乙烯-马来酸酐熔融接枝反应过程中,伴随着聚乙烯分子之间的交联反应,少量的己内酰胺添加剂可以有效地阻止交联反应的发生,改善体系的流变性能,而不明显地降低它的接枝率。这种马来酸酐化聚乙烯作为界面相容剂可使尼龙6-聚乙烯共混物的简支梁抗冲击强度比没有界面相容剂的共混物增加近4倍。     

EFFECT OF THE COMPOSITION OF m-CRESOL/H2O SOLVENT ON HYDRODYNAMIC PROPERTIES OF NYLON 6

The intrinsic viscosity [ η], Huggins constant (KH), [ η]0, α3 and flow activation energy values of nylon 6 have been measured in water/m-cresol (0/100-20/80) systems at different temperatures (20-60℃). It has been found that the intrinsic viscosity, [η]0 and α3 increase with the increase in water contents in m-cresol up to 15% and then decrease. They increase with the increase in temperature irrespective of solvent composition. It has been noted that the percent increase of α3 is the highest at 60℃ and the lowest at 20℃ for a particular solvent system. The intrinsic viscosity data obey Arrhenius equation over the considered conditions. The activation energy and the KH values decrease very sharply with the addition of water,giving a minimum value at 15% of water and then increase slowly. The variation of all the parameters has been explained in terms of variation in thermodynamic quality of solvent with the addition of water to m-cresol and change in temperature,resulting in the change of conformational and orientational properties of polymer molecules. This change of solvent quality also results in variation of selective sorption of solvent over the polymer, such as hydrogen bonding, etc.     

去除内毒素的柱亲和介质与膜亲和介质的制备和特征

以琼脂糖和尼龙６６微孔滤膜为原料，发展了两种用于去 内毒素的不同类型的亲和介质。在对原料进行化学改性后，键合了含六个碳原子的间隔臂和组氨酸亲和配基。它们对内毒素的亲和容量分别为２．０ｍｇ／ｇ和０．２ｍｇ／ｇ，内毒素和介质之间的表观解离常数分别为８．１＊１０＾－１０ｍｏｌ／Ｌ和３．０＊１０＾－８ｍｏｌ／Ｌ。