In the present publication, a method to identify and distinguish between different types of low-density polyethylene based on thermal fractionation and FTIR analysis is described. It was shown that during thermal fractionation four to seven endothermic peaks are obtained as opposed to one or two pea
Identification of the luminescent species in low-density polyethylene
โ Scribed by N. S. Allen; J. Homer; J. F. McKellar; D. G. M. Wood
- Publisher
- John Wiley and Sons
- Year
- 1977
- Tongue
- English
- Weight
- 229 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0021-8995
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## Abstract Amyl branches have been positively identified as one of the principal short short chain branches in low density polyethylenes prepared by high pressure processes.
13C-NMR spectroscopy and size exclusion chromatography have been used to determine the mean length of long branches in a number of high pressure process low density polyethylenes (LDPEs). 13C-NMR analyses count all branches longer than C5 as "long." The polyethylenes studied all had 2-3 long branche
## Abstract It is well known that the addition of a small amount of highโpressure lowโdensity polyethylene (HPโLDPE) to linear lowโdensity polyethylene (LLDPE) can improve the optical properties of LLDPE, and LLDPE/HPโLDPE blend is widely applied to various uses in the field of film. The optical ha