PREP mc20 pages

Full characterization of Polymers by Preparative

Fractionation.

PREP mc2 is a preparative instrument intended for fractionating

polymers by molar mass or by composition (TREF or CRYSTAF).

Samples are put into the vessels and the fractionation is

performed automatically according to the selected method

conditions in less than 24 hours.

Molar Mass fractionation is based on the solvent interaction

with the polymer chains through a solvent/non-solvent

combination. Polydispersity of resulting fractions can be very

narrow.

Composition fractionation is based on differences in

crystallizability of the copolymer resins and can be performed

by dissolution (TREF) or by precipitation (CRYSTAF) approaches.

A single solvent is used to separate fractions according to their

composition by dissolution at different temperatures.

This instrument facilitates the cross-fractionation studies, which

have been shown as a needed tool to fully characterize resins.

KEY POINTS

► Fully-automated fractionation process:

► Two samples can be fractionated simultaneously and up to 8 fractions

can be obtained from each one.

► Up to 16 fractions can be obtained when fractionating one single

sample.

► No hot solvents handling.

► Improved capability of fractionation: up to 4 grams of sample with

new stirring system.

► Possibility of subambient operation (down to -20°C) for low crystallinity

samples.

► Flexible hardware and software to carry out different fractionation methods.

Find out more at www.polymerchar.com/PREP_mc2

20 30 40 BO 60 70 80 90 100 1 10 7 6 5 4 3 2

Temperature (°C) Log Mw

— F2 - F4 — F6 F8 — F1 — F3 — F5 — F7 — F9

— F3 — F5 — F7 — Parent sample — F2 F4 F6 — F8 — Parent sample

Composition Fractionation with 8 fractions. Molar Mass Fractionation with 9 fractions.

Polymer Characterization, S.A. Gustave Eiffel, 8 Paterna T:+34 96 131 81 20 info@polymerchar.com

E-46980Valencia, Spain F: +34 96 131 81 22 www.polymerchar.com

Polymer Char