Seyidoglu, Tijen;Bohn, Manfred A. published 《Effects of four isocyanates and four plasticizers on the thermomechanical and tensile properties of hydroxyl-terminated polybutadiene elastomers and the effect of solid particle filling》. The research results were published in《Journal of Applied Polymer Science》 in 2021.Name: 2,2-Methylenebis(6-tert-butyl-p-cresol) The article conveys some information:
The aim of this study is to analyze effect of four different isocyanates and four different plasticizers in hydroxyl-terminated polybutadiene (HTPB) based elastomers by quant. anal. of the shape of the loss factor (tan δ), tensile strength, deformation frequency shift of the maximum temperatures of loss moduli G” and of tan δ. The first part of the study shows intensities of the tan δ curves with the four isocyanates follow the order HDI > IPDI > H12MDI > Desmodur E305. By mol. modeling of the isocyanates and the corresponding polyurethane parts the influence of mol. geometry on tan δ are discussed. The second part of the study analyzes HTPB-IPDI elastomers with the four different plasticizers DOA, DOS, DOZ, and IDP. The IDP provides lowest Tg at about -83°C, while the others provide at about -78°C. In the third part, aluminum (Al-18μm) and ammonium perchlorate (AP-200μm) are added to HTPB-IPDI+DOA to analyze the effect of particle size, wt% content and particle type on the shape and intensity of the tan δ curves. From the frequency shift of the two maximum temperatures one receives activation energies Eaf. Their average values without and with plasticizer are with tan δ 178 and 165 kJ/mol and with G” 274 and 248 kJ/mol, resp. To complete the study, the researchers used 2,2-Methylenebis(6-tert-butyl-p-cresol) (cas: 119-47-1) .
Name: 2,2-Methylenebis(6-tert-butyl-p-cresol)2,2′-Methylenebis(4-methyl-6-tert-butylphenol)(CAS: 119-47-1) is a natural product found in Streptomyces and Aspergillus fumigatus .
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