Abstract
Polystyrene/polydivinyl benzene (PS/PDVB) composite microspheres of narrow size distribution were prepared by a single-step swelling process of uniform PS microspheres with DVB and benzoyl peroxide, followed by polymerization of DVB within the microspheres. Dissolution of the PS template resulted in porous uniformly sized PDVB microspheres. New, solid, non-halogenated, fire-retardant composite microspheres of narrow size distribution were prepared by encapsulation of resorcinol bis (diphenyl phosphate) (RDP) within the pores of the PDVB microspheres. The encapsulation was performed by two different methods as follows: (1) vacuum and (2) heat/cool cycles. The loading capacity of the RDP into the PDVB particles was elucidated. PS/PDVB-RDP blends were prepared by mixing PS with the PDVB-RDP microspheres. Thermogravimetric analysis (TGA) illustrated that the thermal stability of the PS increases as the content (10-40 %) of the PDVB-RDP increased. Polycarbonate/poly(acrylonitrile-butadiene- styrene)/PDVB-RDP (PC/ABS/PDVB-RDP) blends were prepared by melting PC/ABS together with the PDVB-RDP microspheres at 250 °C and then pelleting it in an injection molding machine at 250 °C and 40 t. The improved thermal stability of the PC/ABS by blending it with PDVB-RDP was demonstrated by a vertical burn test on PC/ABS/PDVB-RDP bones.
Original language | English |
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Pages (from-to) | 2241-2248 |
Number of pages | 8 |
Journal | Colloid and Polymer Science |
Volume | 292 |
Issue number | 9 |
DOIs | |
State | Published - Sep 2014 |
Bibliographical note
Funding Information:These studies were partially supported by a Minerva Grant (Microscale & Nanoscale Particles and Films) and by The Israeli Ministry of Commerce & Industry (NFM Consortium on Nanoparticles for Industrial Applications). Thanks to Oleg Palchik from Kafrit Industries, Israel for his assistance in the preparation of the PC/ABS/PDVB-RDP blends and in the vertical burn tests.
Funding
These studies were partially supported by a Minerva Grant (Microscale & Nanoscale Particles and Films) and by The Israeli Ministry of Commerce & Industry (NFM Consortium on Nanoparticles for Industrial Applications). Thanks to Oleg Palchik from Kafrit Industries, Israel for his assistance in the preparation of the PC/ABS/PDVB-RDP blends and in the vertical burn tests.
Funders | Funder number |
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Israeli Ministry of Commerce & Industry | |
Nemzeti Fejlesztési Minisztérium |
Keywords
- Encapsulation
- Non-halogen fire retardant
- PDVB microspheres
- RDP
- Resorcinol bis (diphenyl phosphate)