Abstract
A triphenyl phosphate (TPP) graft high impact polystyrene (HIPS) (TPP@HIPS) is s>Tithesized to prepare flame retarding HIPS via radical addition reaction of TPP. From FTIR and 'H NMR analyses, successful addition reaction of the TPP and decreases of the amount of double bond of polybutadiene parts in HIPS were confirmed. Reduction of the amount of double bond by addition of TPP can also be confirmed through comparison of Izod impact strength values. From 31P NMR characterization, it can be supposed that the TPP exists as amorphous phase in TPP@HIPS. Thermal stability of the TPP@HIPS is improved, which is deduced by increasing residual char yield observed from TGA analyses. Residual char content of the TPP@HiPS at over 600 °C was 16.65 wt%, whereas there was no residue for pure HIPS (pHIPS). There are not significant differences in limited oxygen index (LOI) values of pHIPS and TPP@HIPS. However, the TPP@HIPS showed superior flame retardancy of V-l rating in UL94 vertical test.
Original language | English |
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Pages (from-to) | 7-12 |
Number of pages | 6 |
Journal | Polymer (Korea) |
Volume | 41 |
Issue number | 1 |
DOIs | |
State | Published - 2017 |
Keywords
- Flame retardant
- High impact polystyrene
- Residual char content
- Triphenyl phosphate
- UL94 vertical test