玻璃纤维-磷酸盐保温发泡材料的制备及性能研究

Preparation and properties of glass fiber phosphate thermal insulation foaming material

通过预混法制备了不同玻璃纤维(0%,3%,6%,9%质量分数)掺量的玻璃纤维-磷酸盐保温发泡材料,对该发泡材料的应力/应变、抗压强度、粉化率、导热系数和热稳定性等进行了分析。结果表明,随着玻璃纤维掺量的增加,玻璃纤维-磷酸盐保温发泡材料的应力/应变、抗压强度、质量损失率和热失重逐渐增大,粉化率逐渐降低,而导热系数无明显变化。当玻璃纤维的掺量为9%(质量分数)时,发泡材料的应变达到0.1,应力达到594 MPa,对应的抗压强度达到最大为497 MPa,与不掺杂玻璃纤维的样品相比提高了152.3%。当玻璃纤维的掺量从3%(质量分数)增加到6%(质量分数)时,发泡材料的粉化率降低了33.0%;当玻璃纤维的掺量从6%(质量分数)增加到9%(质量分数)时,发泡材料的粉化率降低了8.5%。4种玻璃纤维-磷酸盐保温发泡材料经过不燃性测试后,形貌和体积的变化不大,只是表面出现炭化现象,发泡材料的导热系数与玻璃纤维的掺量并无明显关系。

Glass fiber phosphate thermal insulation foaming material with different glass fiber(0wt%,3wt%,6wt%,9wt%)are prepared by premixed method and the stress/strain,tensile strength,powdering rate,thermal conductivity and thermal stability of the foaming materials are analyzed.The results show that with the increasing of glass fiber content,the stress/strain,tensile strength,mass loss rate and thermal weight loss of the glass fiber phosphate thermal insulation foaming material increase gradually but the pulverization rate decreases gradually,while the thermal conductivity has no obvious change.When the content of glass fiber is 9wt%,the strain and stress of the foamed material reach 0.1 and 594 MPa,respectively,and the corresponding tensile strength reaches the maximum of 497 MPa,which is increased by 152.3%compared with that of the sample without glass fiber.When the glass fiber content increases from 3wt%to 6wt%,the powdering rate of the foamed material decreases by 33.0%.When the glass fiber content increases from 6wt%to 9wt%,the powdering rate of the foamed material decreases by 8.5%.After the incombustibility test,the morphology and volume of the four kinds of glass fiber phosphate thermal insulation foaming material have little change but the surface carbonization phenomenon and the thermal conductivity of the foaming materials have no obvious relationship with the amount of glass fiber.