Solution polymerized styrene-butadiene rubber ( S-SBR ) was fractionated by repeated precipitation method, using redistilled toluene as solvent and ethyl alcohol as precipitant.
本工作用甲苯作溶剂，乙醇作沉淀剂，用沉淀分级法，对溶聚丁苯橡胶（S-SBR）进行了分级。
TGS single crystals can be grown by the method of changing solvent, i. e. , adding ethyl alcohol to the aqueous solution of TGS.
用新的溶剂变更法生长TGS单晶，即在TGS水溶液中缓慢加入无水乙醇而使TGS结晶析出。
The existing synthesis method generally uses isoamyl alcohol and the like as solvent, thus having the problems of strong smell, difficult biodegradation and higher environmental pollution.
目前的合成方法常用溶剂为异戊醇等，存在气味大，生物降解困难，环境污染较大；
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