Free-radically polymerizable compounds, compositions including the same, polymerized compounds, methods of making and articles including the same

A free-radically polymerizable compound represented by the formula:

• wherein:
• Ri a C1-C60 organic group having a valence of m+n;
• each PDMS independently represents a monovalent group containing a poly(dialkylsiloxane) segment;
• each Q is independently a covalent bond or an organic linking group having a valence of at least 2;
• each X is independently O, S, or NR1, wherein each R1 is independently H or a C1-C4 alkyl group;
• m and n are independently integers≥1;
• and
• each Z independently represents:
• wherein:
• R2 is —S— or —N(R6)-, wherein R6 is H, a C1-C4 alkyl group, or —R3Si(L)b(R4)3-b;
• R3 is a divalent alkylene group optionally substituted by one or more catenary oxygen atoms;
• R4 is a monovalent nonhydrolyzable group;
• R5 is H or methyl;
• each L is independently a monovalent hydrolyzable group;
• each b is independently 1, 2, or 3;
• and
• a and p are independently integers greater than or equal to 0, wherein:
• 1≤(a+p)≤6;
• for at least one Z, a is at least 1;
• and for at least one Z, p is at least 1;
• and the compound is according to one of the following:
• I) wherein m=1 and n=1;
• II) wherein m=1 and n=2;
• and
• III) wherein 4≤(m+n)≤10 and 3≤n≤9.