Study on Ring-Opening Copolymerization of Trioxymethylene and Second Monomer Initiated by Phosphotungstic Acid

IF 4.6 Q2 MATERIALS SCIENCE, BIOMATERIALS ACS Applied Bio Materials Pub Date : 2022-09-01 DOI:10.1155/2022/5094734
Yanhong Li, Y. Jin, Hongjuan Li, Xiang Li, Yatao Wang, Ruofan Liu, Yibo Wu
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Abstract

In this study, a series of polyoxymethylene copolymers are synthesized by bulk cationic ring-opening polymerization by 1,3,5-trioxane (TOX) with 1,3-dioxolane (DOX), octamethylcyclotetrasiloxane (D4), and cyclohexane oxide (CHO) as the second monomer using phosphotungstic acid (PTA) as an initiator. The polymer products were characterized by hydrogen nuclear magnetic resonance (1H-NMR), infrared spectroscopy (IR), thermogravimetry (TG), and differential scanning calorimetry (DSC). And the copolymerization energy barrier was calculated at the b3lyp/6-31g(d) calculation level using density functional theory (DFT) to explore the copolymerization ability of the second monomer with 1,3,5-trioxane. The results showed that CHO as the second monomer more easily participated in the copolymerization reaction, and the copolymers showed better thermal stability.
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磷钨酸引发三氧亚甲基与第二单体开环共聚的研究
本研究以磷钨酸(PTA)为引发剂,1,3,5-三氧环(TOX)与1,3-二氧环烷(DOX)、八甲基环四硅氧烷(D4)、环氧环己烷(CHO)为第二单体,采用本体阳离子开环聚合法制备了一系列聚氧亚甲基共聚物。采用氢核磁共振(1H-NMR)、红外光谱(IR)、热重(TG)和差示扫描量热法(DSC)对产物进行了表征。利用密度泛函理论(DFT)在b3lyp/6-31g(d)计算能级计算共聚能垒,探讨第二单体与1,3,5-三氧环的共聚能力。结果表明,CHO作为第二单体更容易参与共聚反应,共聚物表现出较好的热稳定性。
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来源期刊
ACS Applied Bio Materials
ACS Applied Bio Materials Chemistry-Chemistry (all)
CiteScore
9.40
自引率
2.10%
发文量
464
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