Article ID Journal Published Year Pages File Type
9560296 Polymer Degradation and Stability 2005 6 Pages PDF
Abstract
First-life outdoor use of low-density polyethylene (LDPE) results in complicated chemical, physical and mechanical changes, decreasing material properties of the reclaimed polymer commingled with small amounts of other polymers. An upgrading system was developed exploiting beneficially chemical changes of the recycled LDPE collected from municipal sources. Analysis of experimental data of melt reprocessing of thermally or photochemically pre-aged LDPE blends with high-impact polystyrene (HIPS) indicated an improvement of impact tensile strength and phase structure after addition of a 1:1 mixture of styrene-butadiene copolymer (SB) with ethylene-propylene-diene monomer (EPDM) (the SB component playing a key role) and by restabilization with N,N′-disubstituted 1,4-phenylenediamine (PD), the latter having a bifunctional character arising from its ability to scavenge both alkyl-peroxy and alkyl radicals. The mechanism of the diamine-mediated compatibilization process is presented.
Related Topics
Physical Sciences and Engineering Chemistry Organic Chemistry
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