نتایج جستجو برای: phenol resin
تعداد نتایج: 46302 فیلتر نتایج به سال:
HPLC and gel permeation chromatographic (GPC) characterization of complex phenol-formaldehyde resins is described. Reversed-phase HPLC fingerprints the phenolic monomers, dimers and some oligomers. The molecular masses of these phenolic compounds were determined using an ion trap mass spectrometer. GPC analyzes tetrahydrofuran-soluble phenolic polymers beyond HPLC capability. The molecular mass...
In this study bio-based bio-phenol-formaldehyde (BPF) resoles were prepared using hydrolytically depolymerized Kraft lignin (DKL) as bio-phenol to partially substitute phenol. The effects of phenol substitution ratio, weight-average molecular weight (Mw) of DKL and formaldehyde-to-phenol (F/P) ratio were also investigated to find the optimum curing temperature for BPF resoles. The results indic...
The cover image designed by Yi-Chun Chen and Wen-Jau Lee depicts spherical phenol-formaldehyde (PF) beads using phenol-liquefied Japanese fir wood powder as raw material. effects of the polymerization degree addition amount granulating agent polyvinyl alcohol on particle size distribution, mechanical thermal properties were investigated. pore characteristics carbon made PF resin produced under ...
Утилизация композиционных материалов на основе термореактивных связующих является одним из главным аспектов производства и эксплуатации изделий них. Существует множество методов, однако основное внимание исследователей направлено разделение полимерной матрицы волокнистого наполнителя. В работе представлены результаты исследования по оценке возможности вторичной переработки стеклопластиков термо...
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