Processability and physico-mechanical properties of ultrahigh-molecular-weight polyethylene using low-molecular-weight olefin wax was written by Bakshi, Ashok Kumar;Ghosh, Anup K.. And the article was included in Polymer Engineering & Science in 2022.Category: esters-buliding-blocks This article mentions the following:
The influence of mol. weight of olefin wax as a plasticizer on the processability and properties of ultrahigh-mol.-weight polyethylene (UHMWPE) was thoroughly investigated in this study. Two different grades of olefin wax (H5 and 210P) were used sep. to plasticize UHMWPE. Comparative results were analyzed based on mixing torque, mech., thermal, thermo-mech., and morphol. aspects. The Gaussian math. model was applied to the internal thermo-shear batch mixing torque data to predict processability and plasticization of the resulting compounds The relatively low-mol.-weight wax (H5) seemed to be more efficient at uncoiling the entanglements among the amorphous phase of UHMWPE. The lowest degree of crystallinity range (34%-40%) and the highest nucleation rate (0.9 min-1) were found with 10 phr H5 wax plasticized UHMWPE. The tensile strength of 30.5 MPa and elastic modulus of 127 MPa, achieved by the addition of H5 wax at 10 phr loading, confirmed the optimum effect of plasticization. The plasticization effect was also established from the loss moduli and Cole-Cole plots. A smaller number of multiple stress-induced overshoots and the inclining approach toward the viscous dominant regime with temperature sweep were observed in the case of 10 phr H5 wax composition SEM anal. revealed disappearance of interfacial crazing and interparticle boundaries progressively with the increase in H5 wax content. Overall, plasticized UHMWPE with 10 phr content of H5 wax showed the optimum processability and properties. In the experiment, the researchers used many compounds, for example, 2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8Category: esters-buliding-blocks).
2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Category: esters-buliding-blocks
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics