✦ LIBER ✦

Bulk polymerization of lactides initiated by aluminium isopropoxide, 3. Thermal stability and viscoelastic properties

✍ Scribed by Philippe Degée; Philippe Dubois; Robert Jérôme

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 501 KB
Volume: 198
Category: Article
ISSN: 1022-1352
DOI: 10.1002/macp.1997.021980624

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The thermal stability of poly(L‐lactide) and L/D‐lactide stereocopolymers polymerized in bulk with aluminium isopropoxide as initiator was investigated by thermogravimetric analysis, and time and temperature dependence of molecular weight and polydispersity. Compared to poly(L‐lactide) prepared with stannous octoate as catalyst the thermal stability of polylactides is remarkably enhanced when the ring‐opening polymerization is initiated by aluminium alkoxide. Ultimate mechanical properties and viscoelasticity of these melt‐stable thermoplastics have also been studied in relation to the polyester enantiomeric composition.

📜 SIMILAR VOLUMES

Bulk polymerization of lactides initiate

Bulk polymerization of lactides initiated by aluminium isopropoxide, 2. Beneficial effect of lewis bases and transfer agents

✍ Philippe Degée; Philippe Dubois; Robert Jérôme 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 519 KB

## Abstract A high increase in the bulk polymerization rate of L,L‐lactide and racemic D,L‐lactide is observed when aluminium isopropoxide is added with an equimolar amount of a Lewis base, such as triphenylphosphine (P(ϕ)~3~) and better 4‐picoline (C~6~H~7~N). Polylactide of high molecular weight