聚四亞甲基醚二醇(PTG)為四氫?喃(THF)開環聚合得到的均聚醚，因產品密度較其他聚醚高而引人注目。且有較好的耐水解性能。PTG是合成熱塑性聚氨酯、聚氨酯彈性纖維（氨綸）的主要原料。 本論文以孔洞直徑尺寸為15nm，30nm，50nm之奈米級SiO2顆粒及大孔洞stream SiO2顆粒使用初濕含浸法製備不同負載量50%，60%，70%的磷鎢酸觸媒(H3PW12O40/SiO2)，以探討不同SiO2載體之磷鎢酸觸媒催化四氫?喃(THF)聚合反應生成聚四亞甲基醚二醇(PTG)的性能。發現下列反應條件可得到接近商品(PTG-2000)規格之聚合物。(1)當磷鎢酸負載量為50%時，最佳的反應條件為使用H3PW12O40/SiO2(30nm)觸媒，反應溫度為60℃。(2)當磷鎢酸負載量為60%時，最佳的反應條件為使用H3PW12O40/SiO2(50nm)觸媒，反應溫度為55及60℃。(3)當磷鎢酸負載量為70%時，最佳的反應條件為使用H3PW12O40/SiO2(50nm)觸媒，反應溫度為55℃。 本論文使用凝膠滲透層析儀法(GPC)、錐板式黏度計、超導核磁共振儀(NMR)、傅立葉轉換紅外線光譜儀(FTIR)、熱場發射掃瞄式顯微鏡(FESEM)、能量散佈分析儀(EDS)、感應耦合電漿原子發射光譜分析儀(ICP-AES)進行PTG產物與觸媒的物性分析。 Polytetramethylene Ether Glycol (PTG) is a polyether produced from the ring-opening polymerization of tetrahydrofuran(THF). Its density is higher than the other polyether. Its major use is for synthesizing thermoplastic polyurethane and spandex. This study uses incipient wetness impregnation method to prepare phosphotungstic acid catalysts supported on four different pore diameter SiO2 species (15nm, 30nm, 50nm, and stream) and uses the catalysis for catalyzing THF polymerization to produce PTG. The following condition are able to produce PTG similar to commercial PTG-2000.(1) When phosphotungstic acid loading uses 50%,the catalyst is H3PW12O40/SiO2(30nm) catalyst, and reaction temperature is 60℃. When phosphotungstic acid loading 60%, using H3PW12O40/SiO2(50nm) catalyst, and reaction temperature is 55、60℃. When phosphotungstic acid loading 70%, using H3PW12O40/SiO2(30nm) catalyst, and reaction temperature is 55℃. We use GPC、Cone/Plate viscometer、NMR、FTIR、FESEM、EDS and ICP-AES to analyze product and catalyst properties.
