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186VO1.18NO.6200211POLYMERMATERIALSSCIENCEANDENGINEERINGNOV=============================================================.2002E-(410073):~~(140C7h)M=150.46(V0/m)-0.5315O~XO:;;;:TG316.341:A:10007555(2002)06004803O[1](VINEX)~(BIOPOL)O(PCL)~~[2]O[34]O~O1:~120CO140C~160C~6h~8h60CO40CO:PCLHimmchi27030~CHC13OPCLO1HNMRAC80(CDC13)OXY4GXO.1PCLFig.1160C750g=1mL=2mL~O2h~3h20.53h45%3h~4:20010119;:20020624:26.h4h07h160C0fig.1Theinfluencesofreactivetimetoreactionfig.2Theinfluencesofreactivetemperaturetoreaction2.2Fig.240g0.25mL0.5mL7h0130C7h0130C84%130C0140C97%0140C0160C0,140C02.3PCL0Fig.3140C7h60g2=10Fig.3000Rp=kp[M][Ti][M];[Ti]0HRf=kf[Ti][I]0.5[I]H(D0=Rp/Rf=k[M][I]0.50Fig.3M=150.46(Vp/mD-0.5315R2=0.9846V(mLD;p(1.1008g/mLD;m(gD00H0946,E-Fig.3EffectsofinitiatortoproductmolecularweightFig.4IRspectrumofpolycaprolactoneFig.5LH-NMRspectrumofpolycaprolactoneFig.6XPsspectrumofpolycaprolactoneTab.LLH-NMRspectrumofpolycaprolactoneVarietyof~Co~2dataofreferenceSC~2dataofreferenceSCB~2CY~2C6~2dataofreferenceSChemical2.382.404.144.141.571.54Shifting2.312.314.084.062.222.233.984.002.4Fig.4:3475cm-1-O~1380cm-1-O~1250cm-1-O~2950cm-122875cm-1-(C~2)n-1470cm-1-(C~2)n-740cm-1-(C~2)n-1300cm-1-(C~2)n-1730cm-1C=O1190cm-1C-O-C1~-NMRFig.5Tab.1[5]Co~2C~28=1.54~1=1=355C~63CX(Fig.6)-[1](YIXiao-Shu).(MaterialReVieWS)1994(4):49.[2](YANg~ui-di).(ChinaPlaSticS)199610(4):1.[3]BrodegL.J.Macromol.Sci.-Chem.A19726(6):1109.[4]MartinBetal.Macromol.199821:286.[5](C~ENJian-hai).(ActaPoly-mericaSinica)1993(3):356.(54tobecontinuedonP.54)052002,O[1]RobertsG.ChitinChemistry.TheMacmillanPressLtd.,1992.[2]ParkCR,KimY~,LeeKY,etal.PolymerPreprints,2000,41(1):377.[3](LUFeng-gi),(CAOZong-shun),(WANGChun-xiang),.(ChineseJournalofBiochemicalPharmaceuties),1997,18(4):78.[4](YEJu-zhao),(FENGBing-lin),(LANGXue-mei),.(PolymerMaterialsScienceEngineering),1997,13:139.[5](Z~AOGuo-jun),(JIANGYong-ming),(S~UNLong-sheng),.(JournalofFunctionalPolymer),1998,11:403.[6](@IShao-gi),(~UPing-chun).(GuangzhouChemistry),2000,25(3):33.PREPARATIONOFLOWMOLECULARWEIGHTCHITOSANBYHETEROGENEOUSDEGRADATIONLIUDa-tong,Z~ANGTao,XUMin,YUXue-hai(Depa1tmentofPolyme1SczenceandEngznee1zng,NanjzngUnzUe1szty,Nanjzng210093,Chzna)ABSTRACT:ThemolecularWeightofchitosanrangedfromhundredthousandstomillions,thislargemolecularWeightbringonmanyproblemsinsomeappliedfileds.InordertoobtaintheloWmolecularWeightchitosan,heterogeneousreactionintothedegradationofchitosanWasin-troducedbyusing~2O2andNaNO2.TheinfluencesofVariousreactionconditionsonthemolecu-larWeightofproductsWerediscussed.Andthechangingofmolecularstructure,crystallizationWeretestedbyFT-IRandWAXD.TheresultsshoWthatbyusing2.5%~2O2,thechitosanWith6105molecularWeightcanbedegradedto2104~4104atabout40in24hWhichcansat-isfythereguirementofloWmolecularWeightchitosan.Keywords:chitosan;degradation;loWmolecularWeight(50Ocontinuedfromp.50)THESYNTHESISOFPOLYMERIZATIONOF6-CAPROLACTONE~UYun,XIEKai,C~ENYi-min,ANLi-hua(CollegeofAe1ospaceandMate1zalEngznee1,NatzonalUnzUe1sztyofDefenseTechnology,Changsha410073,Chzna)ABSTRACT:Thesynthesisofbiodegradablematerial-polycaprolactoneWasstudied.Theinflu-encesofreactiVetime,reactiVetemperatureandtheinitiator(ethyleneglycol)tothereactionofring-openingpolymerizationofcaprolactoneWerediscussed.ThebestreactiVeconditions(140,7h)Wereobtained.ThemolecularWeightofpolycaprolactoneiscontrolledbytheconcentrationofethyleneglycolastheformulaisM=150.46(V0/m)-0.5315.MoreoVer,themolecularstructureofpolycaprolactoneWascharacterizedbyinfraredspectroscopy,~-nuclearmagneticresonancespectroscopyandX-rayphotoelectronspectroscopy.Keywords:polycaprolactone;ring-openingpolymerization;biodegradable;technical452002ε-己内酯聚合反应的研究作者：胡芸，谢凯，陈一民，安立华作者单位：国防科技大学航天与材料工程学院,湖南,长沙,410073刊名：高分子材料科学与工程英文刊名：POLYMERMATERIALSSCIENCE&ENGINEERING年，卷(期)：2002,18(6)被引用次数：10次参考文献(5条)1.益小苏查看详情1994(04)2.杨惠娣查看详情1996(04)3.BrodeGL查看详情1972(06)4.MartinBChemicalstabilityofadapaleneandtretinoinwhencombinedwithbenzoylperoxideinpresenceandinabsenceofvisiblelightandultravioletradiation.[外文期刊]1998(Suppl52)5.陈建海查看详情1993(03)本文读者也读过(10条)1.王建明.陈伟.祝桂香.WangJianming.ChenWei.ZhuGuixiang开环聚合制备聚己内酯[期刊论文]-石化技术与应用2006,24(6)2.谈国华.凌君.沈之荃ε-己内酯在引发剂La(OAr)3作用下的开环聚合特征--用正交试验法探讨最优聚合条件[期刊论文]-高等学校化学学报2003,24(11)3.於秋霞.朱光明.梁国正.杜宗刚.宫兆合聚ε-己内酯的合成、性能及应用进展[期刊论文]-高分子材料科学与工程2004,20(5)4.牛延慧.NIUYan-hui稀土化合物催化ε-己内酯的开环聚合反应的研究进展[期刊论文]-贵州教育学院学报2008,19(6)5.刘炼.魏志勇.张瑶.杨璠.齐民.LiuLian.WeiZhiyong.ZhangYao.YangFan.QiMinε-己内酯均聚物及共聚物的合成与表征[期刊论文]-合成树脂及塑料2006,23(5)6.李佳.郑玉峰.LiJiaZheng.Yufeng医用聚ε-己内酯的合成及热行为研究[期刊论文]-中国科技论文在线2009,4(4)7.於秋霞聚己内酯合成与改性的研究[学位论文]20038.解德良.姜标.杨昌正.XIEDeliang.JIANGBiao.YANGChangzheng羟基酸引发ε-己内酯开环聚合的研究[期刊论文]-高分子学报2000(5)9.庄景.徐世崇聚己内酯多元醇的合成和应用[期刊论文]-上海涂料2003,41(5)10.聚己内酯多元醇在聚氨酯领域中的应用[期刊论文]-聚氨酯工业2003,18(4)引证文献(10条)1.徐文涛.许贞.郑召祥.高为芳.欧华强.张光旭环己酮催化氧化合成ε-己内酯催化剂的研究——介孔分子筛超强酸催化剂的研制及表征[期刊论文]-山东化工2008(10)2.蔡喆.梁燕环己酮合成ε-己内酯的固体催化剂的研制[期刊论文]-化学与生物工程2007(8)3.程东恩.张光旭.陈应澈环己酮氧化合成ε-己内酯的研究进展[期刊论文]-武汉化工学院学报2006(4)4.赵义平.陈莉.李鹏可降解塑料PCL的活性聚合研究[期刊论文]-天津工业大学学报2005(6)5.张彩霞.王艳.张丽芳三(2,4,6-三叔丁基芳氧基)钕催化ε-己内酯开环聚合特征的研究[期刊论文]-山西师范大学学报（自然科学版）2011(1)6.沈丽娟.曲丹.张丽芳三(4-甲