合成技术及应用
閤成技術及應用
합성기술급응용
SYNTHETIC TECHNOLOGY AND APPLICATION
2014年
1期
1-5
,共5页
李杨%刘鹏%吴剑波%杨革生%邵惠丽%胡学超
李楊%劉鵬%吳劍波%楊革生%邵惠麗%鬍學超
리양%류붕%오검파%양혁생%소혜려%호학초
L-丙交酯%双螺杆挤出机%开环聚合%聚乳酸
L-丙交酯%雙螺桿擠齣機%開環聚閤%聚乳痠
L-병교지%쌍라간제출궤%개배취합%취유산
L-lactide%twin-screw extruder%ring-opening polymerization%polylactide
以双螺杆挤出机为反应器来实施L-丙交酯的开环聚合制备聚乳酸,探讨了催化剂种类及其含量、聚合温度及聚合时间等因素对聚合产物性质的影响。实验获得的相对适宜的工艺条件如下:优选辛酸亚锡(Sn(Oct)2)/1-十二醇(CH3(CH2)11OH)为复合催化剂体系,单体与催化剂摩尔比为3000∶1,聚合温度为170℃,聚合时间为120 min,由此可获得粘均相对分子质量为5.3×104的聚(L-乳酸)。在此基础上,进一步采用 FT-IR、1H-NMR、DSC和 TG等分析手段对聚合产物的结构和热性能进行了表征。
以雙螺桿擠齣機為反應器來實施L-丙交酯的開環聚閤製備聚乳痠,探討瞭催化劑種類及其含量、聚閤溫度及聚閤時間等因素對聚閤產物性質的影響。實驗穫得的相對適宜的工藝條件如下:優選辛痠亞錫(Sn(Oct)2)/1-十二醇(CH3(CH2)11OH)為複閤催化劑體繫,單體與催化劑摩爾比為3000∶1,聚閤溫度為170℃,聚閤時間為120 min,由此可穫得粘均相對分子質量為5.3×104的聚(L-乳痠)。在此基礎上,進一步採用 FT-IR、1H-NMR、DSC和 TG等分析手段對聚閤產物的結構和熱性能進行瞭錶徵。
이쌍라간제출궤위반응기래실시L-병교지적개배취합제비취유산,탐토료최화제충류급기함량、취합온도급취합시간등인소대취합산물성질적영향。실험획득적상대괄의적공예조건여하:우선신산아석(Sn(Oct)2)/1-십이순(CH3(CH2)11OH)위복합최화제체계,단체여최화제마이비위3000∶1,취합온도위170℃,취합시간위120 min,유차가획득점균상대분자질량위5.3×104적취(L-유산)。재차기출상,진일보채용 FT-IR、1H-NMR、DSC화 TG등분석수단대취합산물적결구화열성능진행료표정。
Direct preparation of poly(L-lactic acid) (PLLA) by ring-opening polymerization of L-lactide using twin-screw extruder was carried out .The influence of the catalyst type and content , the polymerization temperature and the polymerization time on polymer properties were investigated .The results showed that the relative appropri-ate reaction conditions were as follows:2-ethylhexanoic acid tin ( II) salt was selected as the main catalyst and 1,do-decanol was selected as the cocatalyst , the polymerization temperature was 170℃, the molar ratio of monomer/cat-alyst was 3 000∶1 and the polymerization time was 120 min.Under the above conditions , the PLLA polymer with a molecular weight of about 5.3 ×104 could be obtained.The structure and thermal properties of polymer were char-acterized by FT-IR, 1 H-NMR, DSC and TG, etc.