化工进展
化工進展
화공진전
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2014年
2期
395-399
,共5页
鲁康伟%尹芳华%崔爱军%高建%袁希萌%叶东伟%陈群
魯康偉%尹芳華%崔愛軍%高建%袁希萌%葉東偉%陳群
로강위%윤방화%최애군%고건%원희맹%협동위%진군
乙酸铋%乙交酯%聚乙交酯%开环聚合%生物可降解材料
乙痠鉍%乙交酯%聚乙交酯%開環聚閤%生物可降解材料
을산필%을교지%취을교지%개배취합%생물가강해재료
bismuth (Ⅲ) acetate%glycolide%polyglycolide%ring-opening polymerization%biodegradable materials
以乙酸铋[Bi(OAc)3]为催化剂进行乙交酯的开环聚合,研究了催化剂用量、聚合温度、聚合时间对聚乙交酯(PGA)特性黏度的影响,得出了较优工艺条件为:乙酸铋用量为300μg/g,聚合温度为200℃,聚合时间为2.0 h,合成了特性黏度高达0.884 dL/g、重均相对分子质量为1.12×105的高分子量PGA。比较了乙酸铋和辛酸亚锡的催化性能,结果表明,乙酸铋的催化活性略高于辛酸亚锡。比较了分别以乙酸铋和辛酸亚锡为催化剂合成的PGA的毒性,发现前者的毒性明显低于后者。用X射线衍射(XRD)、差示扫描量热(DSC)和热重分析(TGA)进行了性能表征。
以乙痠鉍[Bi(OAc)3]為催化劑進行乙交酯的開環聚閤,研究瞭催化劑用量、聚閤溫度、聚閤時間對聚乙交酯(PGA)特性黏度的影響,得齣瞭較優工藝條件為:乙痠鉍用量為300μg/g,聚閤溫度為200℃,聚閤時間為2.0 h,閤成瞭特性黏度高達0.884 dL/g、重均相對分子質量為1.12×105的高分子量PGA。比較瞭乙痠鉍和辛痠亞錫的催化性能,結果錶明,乙痠鉍的催化活性略高于辛痠亞錫。比較瞭分彆以乙痠鉍和辛痠亞錫為催化劑閤成的PGA的毒性,髮現前者的毒性明顯低于後者。用X射線衍射(XRD)、差示掃描量熱(DSC)和熱重分析(TGA)進行瞭性能錶徵。
이을산필[Bi(OAc)3]위최화제진행을교지적개배취합,연구료최화제용량、취합온도、취합시간대취을교지(PGA)특성점도적영향,득출료교우공예조건위:을산필용량위300μg/g,취합온도위200℃,취합시간위2.0 h,합성료특성점도고체0.884 dL/g、중균상대분자질량위1.12×105적고분자량PGA。비교료을산필화신산아석적최화성능,결과표명,을산필적최화활성략고우신산아석。비교료분별이을산필화신산아석위최화제합성적PGA적독성,발현전자적독성명현저우후자。용X사선연사(XRD)、차시소묘량열(DSC)화열중분석(TGA)진행료성능표정。
Bismuth (Ⅲ) acetate [Bi(OAc)3] was used as catalyst for the ring-opening polymerization of glycolide. The effects of catalyst content,polymerization temperature,polymerization time were investigated. The optimal condition was obtained as follows:Bismuth (Ⅲ) acetate 300 μg/g, polymerization temperature 200 ℃,polymerization time 2h. The intrinsic viscosity of PGA could reach 0.884dL/g and average molecular weight could reach 1.12×105. The catalytic properties of Bi(OAc)3 and Sn(Oct)2 were compared. The catalytic activity of Bi(OAc)3 was slightly higher than Sn(Oct)2. The toxicity of PGA synthesized by Bi(OAc)3 and Sn(Oct)2 as the catalyst respectively was compared , and the former was lower than the latter obviously. The properties of PGA were characterized by X-ray diffraction (XRD) , differential scanning calormetry (DSC) and thermogravimetric analysis (TGA).