Polyolefins are macromolecules formed by the polymerization of olefin (alkene) monomer units. The most common polyolefins are polypropylene (PP) and polyethylene (PE) homopolymers. These polymers have a wide range of applications from everyday household goods, industrial and medical specialty products. Their properties can further be tuned to perform beyond the typical applications, e.g., Ethylene Propylene Diene Monomer (EPDM) is a popular olefin elastomer used in automotive, sealant and electrical insulation. The purpose of this App Note is to present the precision achievable with an HMJ Y501 Dual Capillary High Temperature Relative Viscometer (HTDSV) system. The analysis conditions are listed below.

Solvent	Decalin
Sample Concentration	0.5 g/dL
Prep Temperature	140C
Dissolution Time	60 Minutes
Analysis Temperature	140C

The data summary clearly shows the superior precision of the instrument. RSD of DSV data is typically less than 1% and the following data supports that claim.

PE Samples	IV @ 140C (dL/g)	NIST Certificate
NIST-1475a-1A	1.1671
NIST-1475a-1B	1.1612
NIST-1475a-2A	1.1649
NIST-1475a-2B	1.1621
NIST-1475a-3A	1.1635
NIST-1475a-3B	1.1684
Average	1.1645	1.180 @ 130C
SD	0.0028
RSD	0.24%

In addition to the precision of the data demonstrated above, the relative viscometer presents an easy opportunity to automate a particularly laborious task. Our fully automated High Temperature Vortex DSV system is ideal for this difficult and hazardous measurement.