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Preparation of poly(propylene carbonate)/organophilic rectorite nanocomposites via direct melt intercalation WAN Chun-jie(万春杰)1,2, YU Jian-ying (余剑英)1, SHI Xiao-jian (石小建)1, HUANG Li..., Wuhan 430073, China Received 10 April 2006; accepted 25 April 2006 Abstract: The completely degradable nanocomposites comprised of poly(propylene carbonate)(PPC) and organo-modified rectorite......
Crystallization and Morphological Evolution of Yttrium Carbonate李永绣,黄婷,黎敏,周雪珍,罗军明,何小彬摘 要:The crystallization and morphological evolution of yttrium carbonate when aging at 50 ℃ after its precipitation by ammonium bicarbonate with feed molar ratio NH4HCO3∶YCl3=2 were investigated by means of XRD, SEM and pH situ-determination. It was found that pH value......
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biopolymer hydrogels (gelatin, agarose and calcium alginate gels) was designed and investigated. A carbonate diffusion method based on the generation of CO2 by slow decomposition of ammonium hydrogen carbonate...-THPP, gelatin, agarose and alginate are shown in Fig. 1. The decomposition reaction of ammonium hydrogen carbonate is NH4HCO3=NH3+CO2+H2O  ......
of methyl carbonate quaternary ammonium salt in high pressure reactor was investigated by using dimethyl carbonate (DMC) substituting for traditional methylene chloride as alkylating agent, tri-n... loading capacity(for WO3) of organic reaches 83.92 g/L. Key words: methyl carbonate quaternary ammonium salt; dimethyl carbonate; tungsten; transformation; solvent extraction N263是萃取冶金常用的季铵盐类(氯型)萃取剂,通过转......
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, ammonia concentration and ammonium carbonate concentration on the dissolving behavior of ammonium paratungstate were studied in (NH4)2CO3-NH3·H2O-H2O system. The results show that rising temperature, prolonging duration, increasing ammonia concentration and decreasing ammonium carbonate concentration favor dissolving of ammonium paratungstate at temperature below 90 °C, while the WO3......
by thermal decomposition of AACH XIAO Jin, WAN Ye, LI Jie (School of Metallurgical Science and Engineering,Central South University, Changsha 410083, China) Abstract: Ammonium aluminum carbonate hydroxide (AACH) was synthesized as the precursor by the precipitation reaction of aluminum sulfate and ammonium carbonate. Then the precursor was calcined to get α-Al2O3 powder. The effect factors......