𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Characterization of Low-Molecular-Weight PLA using HPLC

✍ Scribed by Fabio Codari; Davide Moscatelli; Giuseppe Storti; Massimo Morbidelli

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
299 KB
Volume
295
Category
Article
ISSN
1438-7492

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

HPLC is applied and assessed as an effective tool to investigate both the production of PLA by polycondensation and its corresponding degradation. A new HPLC calibration procedure, through which it is possible to fully characterize LMW PLA samples by determining the concentration of each individual oligomer, is developed. A comparison between HPLC, ^1^H NMR spectroscopy and non‐aqueous solution titration is also reported in order to confirm the reliability of the proposed method. Finally, the proposed analytical technique is applied to monitor the development of a polycondensation reaction performed at 150 °C and 133.3 mbar for 12 h.

magnified image

πŸ“œ SIMILAR VOLUMES

Synthesis and characterization of low-mo
Synthesis and characterization of low-molecular-weight polyacrolein
✍ Maria de FΓ‘tima Vieira Marques; Patricia Reis Pinto; Cristina TristΓ£o de Andrade πŸ“‚ Article πŸ“… 2009 πŸ› John Wiley and Sons 🌐 English βš– 141 KB πŸ‘ 2 views

## Abstract Acrolein was polymerized in a polar solvent in the presence of __terc__‐ and __sec__‐butyl lithium as initiators. Using a low monomer to initiator molar ratio and 1‐h reaction time, cyclic structures were shown to be formed in the main chain of the resulting oligomers. The influence of

Synthesis and molecular weight character
Synthesis and molecular weight characterization of low molecular weight end-functionalized poly(4-acryloylmorpholine)
✍ Elisabetta Ranucci; Gloria Spagnoli; Luciana Sartore; Paolo Ferruti; Paolo Calic πŸ“‚ Article πŸ“… 1994 πŸ› John Wiley and Sons 🌐 English βš– 530 KB

## Abstract New amphiphilic oligomers ending at one side with a reactive function were synthesized by radical polymerization of a vinyl monomer, __N__‐acryloylmorpholine, in the presence of functionalized chain‐transfer agents (CTAs). The oligomers were characterized in terms of molecular weight an