网状交联高分子增塑体系相分离研究

THERMODYNAMIC STABILITY IN PLASTICIZED NETWORK POLYMERS

研究了网状交联高分子增塑体系相分离时热力学平衡条件。结果表明 ,部分增塑剂析出引起交联高分子网体积的变化 ,对体系热力学平衡条件有很大影响。高分子交联密度增大 ,与之相容的增塑剂量也增大 ;增塑剂热力学特性变差会导致增塑的高分子交联网络出现缺陷 。

Thermodynamic conditions of phase equilibrium upon phase separation in plasticized network polymers were considered. The results shows that changes in the volume of the network polymer, caused by separation of a part of the plasticizer, strongly influence the conditions thermodynamic equilibrium. An increase in the network density leads to a considerable increase in the maximum possible amount of plasticizer compatible with the polymer. A decrease in the thermodynamic quality of the plasticizer may result that the thermodynamic stability of the system abruptly diminishes.