Articles prepared using curable compositions based on polymerizable ionic species

A method of making a three-dimensional article, comprising printing the three-dimensional article using a curable composition comprised of at least one polymerizable ionic species corresponding to Formula (I):

• A+B− (I)
• wherein A+ is a cationic species comprising a cationic functional group and a first polymerizable, ethylenically unsaturated functional group;
• and B− is an anionic species comprising an anionic functional group and a second polymerizable, ethylenically unsaturated functional group which is the same as or different from the first polymerizable, ethylenically unsaturated functional group;
• wherein the curable composition comprises less than 10,000 ppm of each of (meth)acrylic anhydride and water and wherein the curable composition when cured provides a cured composition which is thermoplastic in the absence of a protic liquid medium, is fragmentable in a protic liquid medium and comprises ionic crosslinks as a result of incorporation of the ionic species into a polymeric matrix.