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交联高聚物在一定的液体中,能够溶胀,是其特点,也是研究交联高聚物的重要方法.交联高聚物的溶胀,可视为一种特殊的形变;即通过液体分子的自发渗入,交联网络被推开,发生各向同性的变形.当溶胀达平衡时,在网络上应有回缩应力等于溶胀力.如果过分溶胀,则回缩应力将大于溶胀力,过多的液体将被排除,从而恢复平衡.然而这在通常研究溶胀的方法中是不可能实现的.但是,这样的考虑就可以将溶胀和脱水视为两个相反的过程,但它们具有相同的终态——平衡溶胀.因而,可以着重从回缩应力的角度进行高聚物溶胀的研究.
Cross-linked polymer in a certain liquid, to be swollen, is its characteristics, but also an important method of cross-linked polymer.Crosslinked polymer swelling, can be regarded as a special deformation; that is, through the liquid molecules Spontaneous infiltration, cross-linked network is pushed open, the occurrence of isotropic deformation.When the swelling reaches equilibrium, the network should have a retraction stress equal to the swelling force.If excessive swelling, the retraction stress will be greater than the swelling force, too Much of the liquid will be removed to restore the balance, however this is not possible in the usual way of studying swelling, but such considerations make it possible to treat swelling and dehydration as two opposite processes, but they all have the same Final state - balance swelling. Therefore, we can focus on the stress from the perspective of shrinkage polymer swelling research.