材料导报
材料導報
재료도보
MATERIALS REVIEW
2010年
2期
103-107
,共5页
乙基纤维素%L-丙交酯%表征%接枝共聚%接枝率%热性能
乙基纖維素%L-丙交酯%錶徵%接枝共聚%接枝率%熱性能
을기섬유소%L-병교지%표정%접지공취%접지솔%열성능
ethyl cellulose%L-lactide%characterization%graft copolymerization%graft ratio%thermal properties
在辛酸亚锡催化下,成功制备了乙基纤维素与聚L-乳酸接枝共聚物.产物经GPC、FTIR、~1H NMR、~(13)C NMR表征,证实L-丙交酯在乙基纤维素残存的羟基上发生开环聚合,接枝到乙基纤维素骨架上.研究了丙交酯纯度、投料比、催化剂用量、反应时间、反应温度对接枝率的影响,并利用DSC和TG研究了接枝物的热性能.
在辛痠亞錫催化下,成功製備瞭乙基纖維素與聚L-乳痠接枝共聚物.產物經GPC、FTIR、~1H NMR、~(13)C NMR錶徵,證實L-丙交酯在乙基纖維素殘存的羥基上髮生開環聚閤,接枝到乙基纖維素骨架上.研究瞭丙交酯純度、投料比、催化劑用量、反應時間、反應溫度對接枝率的影響,併利用DSC和TG研究瞭接枝物的熱性能.
재신산아석최화하,성공제비료을기섬유소여취L-유산접지공취물.산물경GPC、FTIR、~1H NMR、~(13)C NMR표정,증실L-병교지재을기섬유소잔존적간기상발생개배취합,접지도을기섬유소골가상.연구료병교지순도、투료비、최화제용량、반응시간、반응온도대접지솔적영향,병이용DSC화TG연구료접지물적열성능.
Ethyl cellulose-graft-poly(L-lactic acid)(EC-g-PLLA) graft copolymers are successfully synthesized using Sn(Oct)_2 as an initiator.The copolymers obtained are characterized by means of GPC,FTIR,~1H NMR and ~(13)C NMR.The results show that the PLLA segments are introduced by ring-opening polymerization of L-lactide onto the residual hydroxyl positions on EC.The effects of the purity of L-lactide,feed weight ratio,initiator content,reaction time and reaction temperature on the graft ratio of the copolymer are investigated.The thermal properties of the graft copolymers are studied by DSC and TG.
