CAJ | 학술논문

采用化学合成工艺,以甲苯二异氰酸酯( TDI)为交联剂,二月桂酸二丁基锡为催化剂,成功制备了具有优良相变特性及较高产率的聚乙二醇(PEG)/聚对苯二甲酸乙二醇酯(PET)固-固相转变材料(PCM)。 FT-IR分析表明,PET与PEG确实以TDI为交联剂,发生化学反应并生成了氨基甲酸酯基团键；升温及降温DSC测试表明所合成的PCM确实为固-固相转变。并通过对合成反应温度、反应时间、反应物配比对材料相变特性及产率影响的系统研究,发现该交联体系下PEG与PET的最佳合成温度为160℃,反应时间为2h；且当PEG与PET摩尔比为1∶1时,PCM的产率最高,达到94.4%,相变焓为44.2 J/g,此时材料的利用率最高。
채용화학합성공예,이갑분이이청산지( TDI)위교련제,이월계산이정기석위최화제,성공제비료구유우량상변특성급교고산솔적취을이순(PEG)/취대분이갑산을이순지(PET)고-고상전변재료(PCM)。 FT-IR분석표명,PET여PEG학실이TDI위교련제,발생화학반응병생성료안기갑산지기단건；승온급강온DSC측시표명소합성적PCM학실위고-고상전변。병통과대합성반응온도、반응시간、반응물배비대재료상변특성급산솔영향적계통연구,발현해교련체계하PEG여PET적최가합성온도위160℃,반응시간위2h；차당PEG여PET마이비위1∶1시,PCM적산솔최고,체도94.4%,상변함위44.2 J/g,차시재료적이용솔최고。
In the present work, the polyethyleneglycol ( PEG)/polyethylene terephthalate ( PET) solid-solid phase change materials ( PCM) with excellent phase-change property and high yield have been successfully synthe-sized by chemical synthesis technology using toluene diisocyarate ( TDI) as crosslinking agent and dibutyltin dilaurate as catalyst. FT-IR analysis showed that the carbamic-ester bond was truly formed between PET and PEG with TDI as crosslinking agent. Heating and cooling DSC curves demonstrated that the phase change of the synthesized PCM was a solid phase change process. Through the systematic study of the influence of synthesis reaction temperature, re-action time and reactant ratio on the phase change characteristics and yields of the synthesized PCM, it showed that the optimum synthesis temperature and reaction time for PEG and PET were 160℃ and 2 hours respectively at the present crosslinking system. Moreover, when the molar ratio of PEG to PET was 1:1, the yield of PCM was the high-est, which reached 94. 4% with the phase change enthalpy of 44. 2J/g, and it was when the synthesized PCM realized the highest utilization rate.