6766-69-4Relevant academic research and scientific papers
Ternary composites by an: In situ hydrolytic polymerization process
Nagel,Ka?ner,Seifert,Grützner,Cox,Spange
, p. 14713 - 14721 (2018)
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 ?-aminocaproic acid (?-ACA), ?-caprolactam (?-CL), and 1,1′,1′′,1′′′-silanetetrayltetrakis-(azepan-2-one) (Si(?-CL)4), has been combined with other silicon monomers with one or two methyl groups (MeSi(?-CL)3 and Me2Si(?-CL)2). The simultaneous polymerization of ?-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.
Lactamomethylsilanes – Synthesis, Structures, and Reactivity towards CO2 and Phenylisocyanate
Herbig, Marcus,B?hme, Uwe,Kroke, Edwin
, p. 377 - 387 (2019/02/13)
Lactamomethylsilanes of γ-butyrolactam, δ-valerolactam, ε-caprolactam, and 1-isoindolinone (phthalimidine) with up to three methyl moieties were synthesized according to the chemical formula MexSiLac(4–x) (x = 0, 1, 2, and 3). Using the lactams as starting materials four synthetic routes were tested: salt elimination, transsilylation, transamination, and metallation of the lactames followed by reaction with methylchlorosilanes. All products were analyzed by NMR (1H, 13C and 29Si) and RAMAN spectroscopy. Selected solid products were crystallized and the molecular structure was determined by single-crystal X-ray diffraction. The reactivity of the lactamomethylsilanes towards phenylisocyanate and CO2 was studied.
