PTT及PTT%2fPET共聚酯结构和性能的研究.pdf

摘要 STUDY oF STRUCTURE AND PERFoRMANCE ON PTT AND PTT/PET COPOLYESTER ABSTRACT P01y(erephthalate)is anew kind ofpolyester,which willbe widely used inteXtile、engineering plastics、films and excellent physical—chemical ,3一Propanediol(PD0)is themain material of PTT thisanicle,PTT(B-PTT)was Synthesized wim l,3一PDO pmduced by biosynthesis called as“green industry"by means of directesterification andpolycondensation柚d itsstmcture was characterized by IR、 1H symhesized are mainly innuenced by quali哆of l,3-PD0,condensation time and condensation temperature etc. The propenies ofB—PTT wefe studied pared withPTT(C—PTT) syntllesized wit}lPDO produced bychemos”thesis by means ofDSC、TG results show thatB—PTT ismore superior incolour and higher intrinsic Viscosity and molecular weight thanC—P7丌; inaddition, intrinsicViscosit),and molecular weight increase with theincrease ofpurity. The melting peak oftllemVariesli牡le’but thefo肌er ismore sharp inmelting amplitude,higher incrystallini够than the synthesized wim 摘要 than kPTT/PET,whereas PTT islower than PTT/ non-isothermal crystallization datas ofPTT and PTT/PET copolyester was investigated by Jeziorny method,Ozawa method and Mo non-isothermal crystallization ics behavior ofPTT agrees withtheJeziomy equation;and crystalline rate constant z。increased with theriseof妒,while nchanged from crystallizing behavior ofPTT/PET conforms toOzawa method;and F(T)decreases when the temperature rise,while Ozawa exponential”。fluctuates from to last,the non—isothermal crystallizing behaviors of PTT and PTT/PET follow Mo equation;andFc(T) increases withtherise ofcrystallinity,while a isbetween KEYWORDS:Pa T,PTT/PET copolyester,structure,properties, crystallization ics V 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