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多相高聚物体系是目前广为研究的重要课题。其互容性是研究设计多相高聚物材料的基础。互容性概念源于小分子体系,由于高聚物体系有其特殊性,所以在高聚物互容性研究中,发现完全分子尺度互容的高聚物较少。分子互容性的表征以小角中子散射和低频介电松弛最为有效。但通常用玻璃化转变T_g衡量互溶性。不同测定T_g的方法可得到不同的互容结果。
Heterogeneous polymer system is currently an important issue of extensive research. Its mutual compatibility is the basis for the study of the design of heterogeneous polymer materials. The concept of mutual-compatibility comes from the small molecule system. Due to the particularity of the polymer system, polymer-compatiblity studies show that there are fewer polymers with complete molecular scale compatibility. The characterization of molecular compatibility is most effective with small-angle neutron scattering and low-frequency dielectric relaxation. However, glass transition T_g is usually used to measure mutual solubility. Different methods to measure T_g can get different mutual capacitance results.