空心玻璃微珠对MDI体系聚氨酯弹性体性能的影响

Effect of Hollow Glass Beads on Properties of Polyurethane Elastomers of MDI System

以聚醚多元醇CHE-330N、CHP-2045和异氰酸酯MDI为原料,空心玻璃微珠为填充剂,采用一步法制备聚氨酯弹性体,改变玻璃微珠种类及用量,研究其对弹性体性能的影响。结果表明：空心玻璃微珠明显改善了聚氨酯弹性体的动态热机械性能,但也在一定程度上降低了材料的力学性能和电阻率,当玻璃微珠用量为2%时,S60试样的拉伸强度、断裂伸长率和弹性较高,动静刚度比降到1.75,介质损耗因数降到1.2,动态热机械性能改善最为明显,综合性能最好;随着空心玻璃微珠S60用量的增加,材料的拉伸强度、撕裂强度、断裂伸长率和电阻率呈现下降趋势,动静刚度比和介质损耗因数逐渐减小,动态热机械性能明显改善;当S60用量为2%时,试样的综合性能较好。

This article studies the effect of hollow glass microspheres＇ type and dosage on the mechanical properties and dynamic properties of the matrix after synthesizing the matrix material in one step method with polybasic alcohol（ type 330 N, type 2045）, MDI and other materials as raw materials, and carries on the research from the effect of hollow glass microspheres on properties of elastomers. The results show that the addition of glass hollow beads can improve the dynamic properties of polyurethane elastomer, but also reduce the mechanical properties and resistivity of the materials to a certain extent,when using the same amount of microbeads with the mass fraction of 2%, the tensile strength, elongation at break and elasticity of the samples using Microspheres S60 are higher, the static and dynamic stiffness ratio is reduced to 1.75, the loss factor is reduced to 1.2, and the dynamic performance is improved; as the percentage of glass hollow microspheres（S60 for example） increases, the tensile strength, tear strength, elongation at break and electrical resistivity of the material show a downward trend, the static and dynamic stiffness ratio and the loss factor gradually decreases, and the dynamic performance is obviously improved. When the amount of microbeads is 2%, the sample performance is better overall.