- 學位論文
PET/散熱涼爽粉體複合材料之合成與功能性質研究
A Study on the Synthesis and Functional Properties of PET/ Inorganic Cooling Powder Composite Materials
摘要
本論文主要探討在化學合成對苯二甲酸乙二酯（PET）聚酯方法中，加入無機散熱涼爽粉體（CDS）來改質傳統PET聚酯之研究。 本研究之化學合成方法參考工業化之PET製程－直接酯化法，並於對苯二甲酸（TPA）與乙二醇（EG）合成聚對苯二甲酸乙二酯（PET）過程中，添加1∼10 wt%之不同含量CDS粉體，製備成PET/CDS複合材料，以提高PET散熱涼爽之功能性質。期望進一步能開發出具有舒適性與商業前景良好之保健功能性聚酯纖維。 本研究基於現有文獻理論與商業化製程下，以一段式與兩段式合成方法，藉由添加0、1、3、5、10 wt%之不同含量CDS粉體，合成各種不同添加比例之PET/CDS複合母粒，並觀察其化學結構、熱性質、機械性質及功能性質之變化。 在PET/CDS複合材料之結構分析中，以傅立葉紅外光譜儀（FT-IR）檢測其化學結構，發現添加CDS粉體並未出現新的官能基特徵峰或是造成偏移現象，顯示本研究屬於物理混掺。由掃描式電子顯微鏡（SEM）觀察其表面型態與CDS粉體之分散狀況。以能量分散光譜儀（EDS）對其進行元素分析，顯示出鎂與鈣元素之存在。由熱重分析儀（TGA）分析不同CDS粉體含量對PET/CDS複合材料熱性質之影響，顯示出當CDS粉體添加量增加，造成熱裂解溫度與熱分解速率均降低。以示差掃瞄熱卡分析儀（DSC）進行檢測，發現PET/CDS 1%有最佳之Tg與Tm，但隨著CDS粉體含量增加，熱性質有下降之趨勢。將本研究中合成之PET/CDS複合材料以射出成型機製備成試片，並以萬能試驗機對其進行機械性質測試，發現複合材料之抗拉強度隨CDS粉體添加量之增加而有嚴重破壞之現象。 最後，對PET/CDS複合材料進行熱電偶溫差、紅外線熱影像溫差、瞬間接觸涼感值（Q-max）與熱傳導係數（QTM）之測試，以評估PET/CDS複合材料之散熱涼爽功能性質。在以上四項測試中，複合材料均隨著CDS粉體含量之增加，有較佳之熱調節能力，導熱係數則亦隨之增加。
並列摘要
In this study, the inorganic cooling powders（CDS）were added at the chemosynthesis of Polyethylene Terephthalate（PET） to modify conventional PET polyester. For synthesis, the industrialized processes of polyester－direct esterification method was adopted. The various amounts in between one to ten wt% of inorganic powders（CDS） were added to prepare PET/CDS composites. Such filler was expected to enhance the coolness value of PET. Furthermore, a commercial polyester fiber possessing comfort and health-care functions would be developed. Based on the theoretical and commercialized processes, either one-stage or two-stage method was applied to synthesize all kinds of PET/CDS composite masterbatch chips which contained different weight percentages of inorganic powders as 0, 1, 3, 5 and 10. Those chemical structures, thermal properties, mechanical properties and the variation of functional performance were studied. The chemical structures of PET/CDS composites were investigated by FT-IR, it was found that neither new group was made nor phenomenon of displacement was happened. The SEM was used to observe the morphology of PET/CDS composites and also its results were utilized to determine the dispersibility of inorganic particles. The results of EDS showed the existence of Ca and Mg elements. For the thermal properties, the TGA results showed that the decomposition temperature and weight loss rate of PET/CDS composites declined with increasing inorganic powders（CDS）. The variation in glass transition temperature（Tg）and melting temperature（Tm） were analyzed with DSC and it showed that PET/1wt%CDS composite having the best thermal properties. The plastic injection machine was used to make samples for testing the mechanical properties of PET/CDS composites. The results showed that tensile and compressive strength decreased with increasing of inorganic powders（CDS）. Finally, the cooling function of PET/CDS composites was studied by thermocouple temperature difference system, Infrared Thermograph, Q-max and thermal conductivity meter. From the results of these four mentioned tests, the better thermal effects of PET/CDS composites were concluded while compared with regular PET polyester.