Synthesis of polymers via cationic ring-opening polymerization using (NH4)3PW12O40-SiO2composite catalyst

被引：1
|
作者：
Morinaga, Hisatoyo [1 ]
Nishio, Fumiya [2 ]
Yamashima, Sougo [3 ]
Nakabayashi, Hirotoshi [4 ]
机构：
[1] Univ Yamanashi, Fac Educ, Grad Fac Interdisciplinary Res, 4-4-37 Takeda, Kofu, Yamanashi 4008510, Japan
[2] Univ Yamanashi, Fac Educ & Human Sci, 4-4-37 Takeda, Kofu, Yamanashi 4008510, Japan
[3] Kochi Coll, Natl Inst Technol, Adv Course Mat Sci & Engn, 200-1 Monobe Otsu, Nankoku, Kochi 7838508, Japan
[4] Kochi Coll, Natl Inst Technol, Dept Social Design Engn, 200-1 Monobe Otsu, Nankoku, Kochi 7838508, Japan
来源：
JOURNAL OF POLYMER RESEARCH | 2020年 / 27卷 / 10期
关键词：
Heteropolyacid ammonium salt; Ring-opening polymerization; Sol-gel method; Solid-acid catalyst; ACID; CONVERSION; OXETANE; GEL;
D O I：
10.1007/s10965-020-02279-y
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Composite catalyst of heteropolyacid ammonium salt, (NH4)(3)PW12O40, and SiO(2)was prepared by sol-gel method. The resultant catalyst ((NH4)(3)PW12O40-SiO2, 3.38wt%) having W/Si molar ratio of 2/8 enabled to proceed ring-opening polymerizations of tetrahydrofuran (THF), epsilon-caprolactone (CL), and glycidyl phenyl ether (GPE) to give the corresponding poly(THF), poly(CL), and poly(GPE) having number-average molecular weights (M-n) of 6610, 4010, and 2370 with polydispersity index (M-w/M-n) of 1.57, 1.36, and 1.49 in 24%, 88%, and 59% yields, respectively. Matrix-assisted laser desorption ionization time of flight mass spectrometry (MALDI-TOF MS) spectra of poly(CL) and poly(GPE) exhibited that Bronsted acid induced from (NH4)(3)PW12O40-SiO(2)is the only one species that initiates the polymerization.
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页数：8
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