A method of preparing a sterile article is disclosed. A polymer halogen-containing repeating unit is prepared that contains about 0.005 to about 65 phr of a stabiliser having the general formula TGOT, where each T is independently selected from R-, R-CO-, -P(R)¿,2?, -P(OR)¿2?, Si(R)¿3?, or -Si(OR)¿3?, T is T or A[GOT]¿n?, each A is independently selected from LS- Sn(R)¿3-q?(OLJ)¿q?,(CH¿2?)¿p?S-Sn(R)¿3-q?(S(CH¿2?)¿p?-J)¿q?-LC0¿2?Sn(R)¿3-q?(OLCO-J)¿q?, or LSn(Y)¿3-q?(LJ)¿q? when n is 0, from CO, E, CO-E-CO, Si(R)¿2?, Si(OR)¿2?, (Si(R)¿2?G)¿r?, (CO-E-CO-G)¿r?, (C0-G)¿r?, or (E-G)¿r? when n is 1 , and from P, PO and trimellitate when n is 2, Y is -SLJ, -SLJ, -SLOR, -OLJ, -OLR, -S(CH¿2?)¿p?, each R is independently selected from R1, aralkyl from C¿6? to C¿12?, and aryl from C¿6? to C¿12?, E is alkylene from C¿1? to C¿12?, m is 1 to 20, n is 0 to 2, p is 0 to 10, q is 0 to 3 and r is 1 to 20. An article is made from the polymer and the article is sterilised with ionising radiation. Also disclosed are novel stabilisers for use in this method.
