广州化工
廣州化工
엄주화공
GUANGZHOU CHEMICAL INDUSTRY AND TECHNOLOGY
2015年
15期
63-65
,共3页
张苗苗%常军%杨超%张恒%许贺
張苗苗%常軍%楊超%張恆%許賀
장묘묘%상군%양초%장항%허하
L-乳酸%1,4-丁二醇%熔融缩聚%端羟基聚乳酸
L-乳痠%1,4-丁二醇%鎔融縮聚%耑羥基聚乳痠
L-유산%1,4-정이순%용융축취%단간기취유산
L-lactic acid%1,4-Butanediol%melt polycondesation%hydroxyl terminated PLLA
以左旋乳酸和1,4-丁二醇为原料,氯化亚锡(SnCl2?2H2O)和辛酸亚锡(Sn(OCT)2)为催化剂通过熔融缩聚法合成端羟基聚乳酸(HO-PLLA-OH)。熔融缩聚反应工艺条件为:0.1%SnCl2?2H2O(mol%)和0.1%Sn(OCt)2(mol%),聚合温度控制在180℃,反应时间为10 h,并采用红外光谱(IR)、核磁共振谱(1H-NMR),测得产物黏均分子量(Mη)为9528,差示扫描热分析( DSC)等手段对聚合物的热性能进行了研究。低聚物在缓冲液中20天失重率为43.1%。
以左鏇乳痠和1,4-丁二醇為原料,氯化亞錫(SnCl2?2H2O)和辛痠亞錫(Sn(OCT)2)為催化劑通過鎔融縮聚法閤成耑羥基聚乳痠(HO-PLLA-OH)。鎔融縮聚反應工藝條件為:0.1%SnCl2?2H2O(mol%)和0.1%Sn(OCt)2(mol%),聚閤溫度控製在180℃,反應時間為10 h,併採用紅外光譜(IR)、覈磁共振譜(1H-NMR),測得產物黏均分子量(Mη)為9528,差示掃描熱分析( DSC)等手段對聚閤物的熱性能進行瞭研究。低聚物在緩遲液中20天失重率為43.1%。
이좌선유산화1,4-정이순위원료,록화아석(SnCl2?2H2O)화신산아석(Sn(OCT)2)위최화제통과용융축취법합성단간기취유산(HO-PLLA-OH)。용융축취반응공예조건위:0.1%SnCl2?2H2O(mol%)화0.1%Sn(OCt)2(mol%),취합온도공제재180℃,반응시간위10 h,병채용홍외광보(IR)、핵자공진보(1H-NMR),측득산물점균분자량(Mη)위9528,차시소묘열분석( DSC)등수단대취합물적열성능진행료연구。저취물재완충액중20천실중솔위43.1%。
L-lactic acid and 1,4-butanediol were used to synthesize hydroxyl terminated PLLA( HO-PLLA-OH) by melt polycondensation with stannous chloride and stannous octoate as catalyst.The polymerization conditions was attributed as follows:the dose of SnCl2? 2H2 O and Sn(OCT)2 reached 0.1%, polymerization temperature was 180℃, polymerization time was 10 h.The synthesized HO-PLLA-OH was detected by infrared spectroscopy ( IR) and proton nuclear magnetic resonance (1H-NMR).The viscosity-average molecular weight was exceeded 9528 detected by ubbelohde viscometer, and the thermal perproty was investigated by differential scanning calorimeter(DSC).Weight loss of HO-PLLA-OH was 43.1%in 20 days.