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- W1964502022 abstract "Poly(lactones) may be crosslinked by ring-opening polymerization of the corresponding cyclic esters in the presence of tetrafunctional bis(ϵ-caprolactone). The homopolymer of 1.5-dioxepan-2-one (DXO) has poor mechanical properties but also some very good properties, such as biocompatibility and degradability. Crosslinking of degradable polymer based on the poly(ether-ester) DXO was performed with crosslinkers having the same reactivity as the monomer. 2,2-Bis(ϵ-caprolactone-4-yl)propane (BCP) and bis(ϵ-caprolactone-4-yl) (BCY) with tetrafunctionalities were synthesized from the corresponding diols and then used as comonomers during the polymerization of DXO. The comonomers showed the same reactivity to the initiator, stanneous 2-ethylhexanoic acid, as DXO and perfectly random crosslinked films were obtained. The crosslinked films showed a high degree of swelling already at 2–3 mol % BCP or BCY. The BCP crosslinker was somewhat less soluble in DXO at lower temperatures, but all BCP was soluble at 180°C. These polymeric films were elastic with no crystallinity and the Tg values increased from −39°C for pure DXO to −35°C for BCP crosslinked films and −21°C for BCY crosslinked ones. © 1997 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 35: 1635–1649, 1997" @default.
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- W1964502022 date "1997-07-15" @default.
- W1964502022 modified "2023-10-05" @default.
- W1964502022 title "Synthesis of degradable crosslinked polymers based on 1,5-dioxepan-2-one and crosslinker of bis-?-caprolactone type" @default.
- W1964502022 doi "https://doi.org/10.1002/(sici)1099-0518(19970715)35:9<1635::aid-pola5>3.0.co;2-q" @default.
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