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Study of the mechanical, thermal properties and flame retardancy of rigid polyurethane foams prepared from modified castor-oil-based polyols
Po1lyurethane foams (PUFs) were prepared using modified castor-oil-based polyols (MCOs). In the first stage, castor oil (CO) was converted into monoglycerides and diglycerides by alcoholysis withExpand
METHODS TO IMPROVE LIGNIN’S REACTIVITY AS A PHENOL SUBSTITUTE AND AS REPLACEMENT FOR OTHER PHENOLIC COMPOUNDS: A BRIEF REVIEW
Lignin is readily available as a by-product from the pulp and paper industry. It is considered to be a promising substitute for phenol in phenol-formaldehyde (PF) resin synthesis, given theExpand
Selective adsorption of Ag+ by ion-imprinted O-carboxymethyl chitosan beads grafted with thiourea–glutaraldehyde
Abstract In this study, a novel technique combining surface imprinting and polymer crosslinking was applied to synthesize the Ag + -imprinted thiourea/glutaraldehyde grafted O-carboxymethyl chitosanExpand
TUNG OIL BASED MONOMER FOR THERMOSETTING POLYMERS: SYNTHESIS, CHARACTERIZATION AND COPOLYMERIZATION WITH STYRENE
A tung oil (TO) based monomer for rigid thermosetting polymer was synthesized, characterized, and copolymerized with styrene in this study. Tung oil was alcoholyzed with pentaerythritol (PER) to getExpand
Cerium oxide-based catalysts made by template-precipitation for the dimethyl carbonate synthesis from Carbon dioxide and methanol
Abstract This paper mainly describes a novel synthesis of three different ceria catalysts CeO 2 , CeO 2 –SiO 2 and CeO 2 -4A via template-precipitation method. The prepared catalysts were fullyExpand
Synthesis of rigid polyurethane foams with castor oil-based flame retardant polyols
A new method of introducing castor oil based flame-retardant polyols (COFPL) into polyurethane foams was explored in this paper. Castor oil was alcoholyzed with glycerol. And epoxidation ofExpand
A thermal self-healing polyurethane thermoset based on phenolic urethane
Thermosetting polyurethanes have excellent elastic properties and solvent resistance, but they cannot be reshaped like thermoplastic polymers after molding. In this study, we designed a thermosettingExpand
CHARACTERIZATION AND PROPERTIES OF A LIGNOSULFONATE-BASED PHENOLIC FOAM
Phenolated lignosulfonate was introduced into the synthesis of phenolic resol with phenol and formaldehyde in an alkaline condition. The modified resol was successfully applied to prepare phenolicExpand
Synthesis of foaming resol resin modified with oxidatively degraded lignosulfonate
Abstract A new method of introducing lignosulfonate into foaming resol resin was explored in the present work. Lignosulfonate was oxidatively degraded to phenolic compounds in water medium (pH = 10),Expand
Study of droplet formation process during drop-on-demand inkjetting of living cell-laden bioink.
TLDR
It is found that as the cell concentration of bioink increases, the droplet size and velocity decrease, the formation of satellite droplets is suppressed, and the breakup time increases, and compared to the hard bead-laden suspension, the bioink tends to have a less ejected fluid volume, lower droplet velocity, and longer breakup time. Expand
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