A membrane obtainable from curing a composition comprising:
(i) a curable compound comprising at least two (meth)acrylic groups and a sulphonic acid group and having a molecular weight which satisfies the equation:
MW<(300+300n)
wherein:
MW is the molecular weight of the said curable compound; and
n has a value of 1, 2, 3 or 4 and is the number of sulphonic acid groups present in the said curable compound;
and optionally (ii) a curable compound having one ethylenically unsaturated group; wherein the molar fraction of curable compounds comprising at least two (meth)acrylic groups, relative to the total number of moles of curable compounds present in the composition, is at least 0.25.
一种可通过固化由以下成分组成的组合物而获得的膜
(i) 由至少两个(甲基)
丙烯酸基团和一个
磺酸基团组成的可固化化合物,其分子量满足等式:
MW<(300+300n)
其中
MW 是所述可固化化合物的分子量;以及
n 的值为 1、2、3 或 4,是存在于所述可固化化合物中的磺酸基团的数目;
和可选的 (ii) 具有一个乙烯不饱和基团的可固化化合物;其中包含至少两个(甲基)
丙烯酸基团的可固化化合物摩尔分数相对于组合物中存在的可固化化合物摩尔总数至少为 0.25。