STUDY OF FLAME RETARDING FINISH OF POLYPROPYLENE / VISCOSE BLEND FABRICS

The combustion mechanisms of PP / Viscose blend fabrics are briefly discussed, and the factors affecting flame retarding(FR) effect are analyzed. Apart from this, the choice of processes of FR finish is also discussed in this paper. Other factors such as coating add-on, curing temperature and time are studied too. The results show that the factors above all have different extent of influence upon FR effect.     

酸性可染丙纶染色工艺的探讨

采用共混改性的方法,研制出酸性可染丙纶,探讨了BCPA含量、染料种类、温度、pH值对丙纶染色性能的影响.结果表明,当BCPA含量为8%,选用弱酸性染料,适当控制染色温度和染浴pH值就可获得良好的可染性.     

体育课“弹性教学”之我见

人类社会已步入充满竟争的二十一世纪,在这信息时代,人们对知识、信息的获取方法与途径已不再具有唯一性,而是空间、多维性了。体育课作为向学生传授体育的基础知识、基本技术和技能,提高身心健康的一种基本形式,其教学的形式与方法也同样不能是一成不变的,因此,我们不妨把弹性的、开放的教学模式引入课堂,让学生在充满民主、和谐、轻松的气氛中上好体育课。     

稀土掺杂二氧化钛的合成及抗紫外性能的研究

采用溶胶-凝胶法制备纯净及稀土掺杂的TiO2，用X-射线衍射（XRD）和UPF进行表征，研究了不同掺杂种类及掺杂量对紫外吸收性能的影响，结果表明掺杂2?O2、2％La2O3、1．2％Gd2O3时TiO2抗紫外性能均有明显提高，其中掺杂2％CeO2的效果最佳。     

SYNTHESES AND CHARACTERIZATION OF A SERIES OF RARE EARTH BINUCLEAR COMPLEXES

A direct method of obtaining complexes of cobalt with respect to rare earth elements is reported. The total of 14 new compounds which are insoluble in water and general organic media have been synthesized by the reaction of RE(Ac)_3·XH_2O (RE=rare earth elements except for Ce, Pm; X=2, 5, 8) with [H_6CO_2(Gc)_5CS_2] (Gc=~-S_2CNHCH_2CO_2~-) in acetone/ water at room temperature. The complexes having the general formula, [RE_2Co_2(Gc)_5HAcCS_2·XH_2O], were characterized by elemental analyses, infrared spectra, DSC and TGA.     

Synthesis and Characterization of New Polyimide Containing Calix[4]arenes in the Polymer Backbone with Transport Ability

New polyimide containing calix [4] arene moieties on the polymer backbone was successfully synthesized in N- methy1 - 2 - pyrrolidone （NMP） by polycondensations of 3, 3＇, 4, 4＇- oxydiphthalic anhydride （ODPA） with the diaminocalix[4]arene monomer using 3,3＇- dimethy1- 4, 4＇- The polyimide prepared is soluble in common solvents, such as NMP, DMAc, DMF and chloroform. The polyimide films obtained have excellent thermal stability and mechanical property. At the same time, the liquid membrane transport of potassium ions by the new polyimide was investigated, which testified that compared to ODPA-DADPM polyimide, the polyimide containing culix[4] arenes has the transport ability to metal ions in regard to bulky, cone-like calix [-4] arene moieties.