Topic
Vicat softening point
About: Vicat softening point is a research topic. Over the lifetime, 1346 publications have been published within this topic receiving 12455 citations.
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TL;DR: In this article, the authors employed Diffuse Reflectance Infrared DR-FTIR spectroscopy to monitor chemical transformations in pastes of Portland limestone cement and concluded that the setting is caused by interparticle coalescence of C-S-H.
489 citations
TL;DR: In this paper, Ramie fiber reinforced poly(lactic acid) (PLA) composites were prepared by a two-roll mill and Ramie was treated by alkali and silane (3-aminopropyltriethoxy silane and γ-glycidoxypropyltrimethoxysilane).
Abstract: Ramie fiber reinforced poly(lactic acid) (PLA) composites were prepared by a two-roll mill. Ramie was treated by alkali and silane (3-aminopropyltriethoxy silane and γ-glycidoxypropyltrimethoxy silane). Effect of surface treatment on the properties of the composites was studied. The tensile, flexural and impact strength of the composites have a significant improvement. Dynamic mechanical analysis (DMA) results show that the storage moduli of the composites with treated ramie increase with respect to the plain PLA and the composites with untreated fiber whereas tangent delta decreases. The Vicat softening temperature of the composites with treated fiber is greatly higher than that of the composites with untreated fiber. The results of thermogravimetric analysis (TGA) show that fiber treatment can improve the degradation temperature of the composites. Moreover, the morphology of fracture surface evaluated by scanning electron microscopy (SEM) indicates that surface treatment can get better adhesion between the fiber and the matrix.
404 citations
TL;DR: In this paper, a series of iPP/SiO2 nanocomposites, containing 1, 2.5, 5, 7.5 and 15% SiO2 nanoparticles, were prepared by melt mixing in a twin screw co-rotating extruder.
233 citations
TL;DR: In this article, the effects of different curing temperature (within the range 20 to 100°C) on electrical conductivity in geopolymerization process were systematically discussed with Impedance Analyzer.
223 citations
TL;DR: In this paper, a broad experimental study has been performed to characterize the early hydration and setting of cement pastes prepared with Class H oil well cement at water-to-cement ratios (w/c) from 0.25 to 0.40, cured at temperatures from 10 to 60°C, and mixed with chemical additives.
219 citations