Study of the Addition of a Thermoplastic Vulcanizate to a HDPE Composite Highly Filled with Magnesium Hydroxide and Its Effect on the Tensile and Flame Retardant Properties

Table 6

Data obtained from the cone calorimeter on the composites studied.

Formulations^a	(s)	(s)	pHRR (kJ/s)/m^2	THR (MJ/m^2)	(s)
HDPE	43	148	1,924	148.4	414
TPO-20	113	165	257	84.1	618
TPO-30	110	170	244	78.2	626
TPO-40	111	165	218	78.6	655
TPV-20	122	205	202	80.7	730
TPV-30	116	201	208	80.5	734
TPV-40	128	190	207	79.5	810

^aThe TPV in all composites is a blend of EPDM/HDPE (60/40 wt%), crosslinked with 0.10 phr Luperox. All 6 composites with TPO/TPV and with 130 phr Mg(OH)₂ as in Table 3. (1 watt of power produces 1 Joule/s or 0.24 calories/s of heat energy).