欢迎来到天天文库
浏览记录
ID:33655849
大小:2.05 MB
页数:86页
时间:2019-02-28
《ptt及pttpet共聚酯的结构与性能研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、摘要STUDYoFSTRUCTUREANDPERFoRMANCEONPTTANDPTT/PETCOPOLYESTERABSTRACTP01y(trimethyleneterephthalate)isanewkindofpolyester,whichwillbewidelyusedinteXtile、engineeringplastics、filmsetc.foritsspecialstmctureandexcellentphysical—chemicalpr叩erty.1,3一Propanediol(PD0)isthemainmaterialofPTT
2、syntllesized.Inthisanicle,PTT(B-PTT)wasSynthesizedwiml,3一PDOpmducedbybiosynthesiscalledas“greenindustry"bymeansofdirectesterificationandpolycondensation柚ditsstmcturewascharacterizedbyIR、1HNM哏.PTTsymhesizedaremainlyinnuencedbyquali哆ofl,3-PD0,condensationtimeandcondensationtempera
3、tureetc.ThepropeniesofB—PTTwefestudiedandcomparedwithPTT(C—PTT)syntllesizedwit}lPDOproducedbychemos”thesisbymeansofDSC、TGandWAXD.TheresultsshowthatB—PTTismoresuperiorincolourandhigherintrinsicViscosityandmolecularweightthanC—P7丌;inaddition,intrinsicViscosit),andmolecularweightin
4、creasewiththeincreaseofpurity.ThemeltingpeakoftllemVariesli牡le’butthefo肌erismoresharpinmeltingamplitude,higherincrystallini够thanthelatter.P7rTsynthesizedwimlII摘要thankPTT/PET,whereasfI/2PTTislowerthanrl/2PTT/PET.Thenon-isothermalcrystallizationdatasofPTTandPTT/PETcopolyesterwasin
5、vestigatedbyJeziornymethod,OzawamethodandMomethod.Thenon-isothermalcrystallizationkineticsbehaviorofPTTagreeswiththeJeziomyequation;andcrystallinerateconstantz。increasedwiththeriseof妒,whilenchangedfrom3.2to4.5.ThecrystallizingbehaviorofPTT/PETconformstoOzawamethod;andF(T)decreas
6、eswhenthetemperaturerise,whileOzawaexponential”。fluctuatesfrom2.3to3.2.Atlast,thenon—isothermalcrystallizingbehaviorsofPTTandPTT/PETfollowMoequation;andFc(T)increaseswiththeriseofcrystallinity,whileaisbetween1.1and1.9KEYWORDS:PaT,PTT/PETcopolyester,structure,properties,crystalli
7、zationkineticsV北京化工大学位论文原创性声明本人郑重声明:所呈交的学位论文,是本人在导师的指导下,独立进行研究工作所取得的成果。除文中已经注明引用的内容外,本论文不含任何其他个人或集体已经发表或撰写过的作品成果。对本文的研究做出重要贡献的个人和集体,均已在文中以明确方式标明。本人完全意识到本声明的法律结果由本人承担。作者签名:查壅笙日期:沙口g.f加关于论文使用授权的说明学位论文作者完全了解北京化工大学有关保留和使用学位论文的规定,即:研究生在校攻读学位期间论文工作的知识产权单位属北京化工大学。学校有权保留并向国家有关部门或机构送交论文的
8、复印件和磁盘,允许学位论文被查阅和借阅;学校可以公布学位论文的全部或部分内容,可以允许采用影印
此文档下载收益归作者所有