The salt concentration of reaction system must be larger than the critical salt concentration of in precipitation polymerization and is limited by solubility of the salt.
盐溶液中沉淀聚合反应体系的盐浓度既要大于沉淀聚合临界盐浓度，又要受到盐的溶解度的限制。
2
The solubility of the resin depends on the critical balance of positively and negatively charged ions.
树脂的溶解性取决于阴，阳离子的电平衡。
3
The 31 kinetic data of hydrate formation in gaseous, near-critical and supercritical condition and 4 solubility data were measured.