Ternary composites by an in situ hydrolytic polymerization process.

Ternary composites by an in situ hydrolytic polymerization process.
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DOI:
10.1039/c8ra02402b
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发表时间:
2018-04-17
期刊:
影响因子:
3.9
通讯作者:
Spange, S.
Spange, S.
中科院分区:
化学3区
文献类型:
--
作者:
Nagel, K.;Kassner, L.;Seifert, A.;Gruetzner, R-E.;Cox, G.;Spange, S.

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聚酰胺6/改性二氧化硅复合材料是通过偶联聚合过程制备的。为此,我们在之前的出版物中提出了由 ε-氨基己酸 (ε-ACA)、ε-己内酰胺 (ε-CL) 和 1,1',1'',1'''-硅烷四基四基四-(azepan-2-one) (Si(ε-CL)4) 组成的三组分系统,与其他具有一个或两个甲基的硅单体 (MeSi(ε-CL)3 和Me2Si(ε-CL)2)。 ε-CL 和硅单体的同时聚合可一步原位形成二氧化硅/聚硅氧烷颗粒和周围的聚酰胺 6 基质。此外,三组分体系中还添加了3-氨基丙基三乙氧基硅烷,以实现有机相和无机相之间的共价键合,并抑制二氧化硅颗粒的团聚。通过固态 NMR 和 FTIR 光谱以及电子显微镜和 SEC 测量研究了复合材料的化学结构和形态。通过 DSC 和 TGA 测量研究了结构对热性能的影响。使用内酰胺取代的硅单体通过一步法制备了聚酰胺 6/二氧化硅/聚硅氧烷复合材料。
Polyamide 6/modified silica composite materials have been prepared by a coupled polymerization procedure. For this purpose, the three-component-system we presented in a previous publication, consisting of ε-aminocaproic acid (ε-ACA), ε-caprolactam (ε-CL), and 1,1′,1′′,1′′′-silanetetrayltetrakis-(azepan-2-one) (Si(ε-CL)4), has been combined with other silicon monomers with one or two methyl groups (MeSi(ε-CL)3 and Me2Si(ε-CL)2). The simultaneous polymerization of ε-CL and silicon monomers leads to the in situ formation of silica/polysiloxane particles and the surrounding polyamide 6 matrix in one step. Moreover, 3-aminopropyltriethoxysilane has been added to the three-component-system to achieve covalent bonding between organic and inorganic phases and to inhibit agglomeration of the silica particles. Chemical structures and morphologies of the composites have been investigated by solid-state NMR and FTIR spectroscopy as well as electron microscopy and SEC measurements. Structural effects on thermal properties have been studied by DSC and TGA measurements. Polyamide 6/silica/polysiloxane composites have been prepared in a one-step process using lactam-substituted silicon monomers.
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发表时间: 1993-03-30
影响因子: --
作者:
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通讯作者: KAMIGAITO, O
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