Preparation and characterization of polyether‐based polyurethane dolomite composite

Abstract

A polyether polyol-based two-component polyurethane composite was prepared by a reaction of polypropylene glycol (PPG) and diethylene glycol (DEG) used as a crosslinker. The final reaction for the preparation of composite is carried out with processed polyether polyol and diphenylmethane 4,4 0 -diisocyanate (MDI). The physicochemical properties of processed polyether polyol have been measured, such as viscosity, moisture content, and hydroxyl value. The composite has been formed with loading of inorganic filler dolomite [MgCa(CO 3 ) 2 ] with different filler ratios. It shows good adhesive strength and mechanical properties. Composite samples have also been studied for the effects of acids and bases, swelling in solvents, physical and mechanical properties such as compression strength, shore hardness A and D, tensile strength, and elongation. Some electrical properties have also been studied, viz. thermal conductivity, volume resistivity, and dielectric strength. A comparison of prepared polyetherbased polyurethane composite with some conventional polymeric materials suggests their suitability for various applications.

Flammability, Thermal and Mechanical Properties of Polybutylene Terephthalate/Dolomite Composites

“…Similar results were reported by previous researchers working on polymer/dolomite composites, whereby the elongation of break decreased with increasing dolomite content. 9,12 Figure 5: Elongation at break of PBT and PBT/dolomite composites.…”

“…Several researchers have reported studies on the effect of dolomite on mechanical properties of polymers. [9][10][11][12] Ali et al reported that dolomite increased the compressive strength of polyester-based polyurethane composites. 9 Another study reported that dolomite enhanced the modulus and hardness of polyester/ dolomite composites.…”

“…[9][10][11][12] Ali et al reported that dolomite increased the compressive strength of polyester-based polyurethane composites. 9 Another study reported that dolomite enhanced the modulus and hardness of polyester/ dolomite composites. 10 Nik Adik et al investigated the effects of stearic acid on tensile properties of polypropylene (PP)/dolomite composites at various dolomite contents.…”

“…13 A few researchers have reported the effect of dolomite on the flammability of polymer/ dolomite composites. 9,11,12 Amiri et al reported that polyurethane (PU)/dolomite composite produced longer burning time and lower heat release rate compared to PU/clay composites based on cone calorimeter data. 11 Although many research works have been reported on the incorporation of fillers into PBT, to the authors' knowledge, no study has been reported on PBT/dolomite composites especially on flammability property.…”

Nanoki̇l Ve Kabaran Alev Geci̇kti̇ri̇ci̇ İlavesi̇ni̇n Ri̇ji̇t Poli̇üretan Köpük Malzemeleri̇n Isil Bozunma Ve Yanma Davranişlarina Etki̇leri̇ni̇n İncelenmesi̇

“…Bu yüzden, bu özelliklerin iyileştirilmesi üzerine çalışmalar devam etmektedir. Bu malzemelerin ısıl bozunma ve yanma dirençlerinin artırılması için uygulanan yöntemler arasında, farklı alev geciktiriciler [1][2][3][4][5] ve dolgu maddelerinin [6][7][8][9][10][11] ilavesi önemli bir yer tutmaktadır. Malzemelerin ısıl bozunma ve yanma direnci artırılırken, ısı iletim katsayısı ve mekanik özelliklerindeki değişimlerin de incelemeye alınması gerekmektedir [12,13].…”