Determination of Partition Coefficients of Selected Model Migrants between Polyethylene and Polypropylene and Nanocomposite Polypropylene

Table 6

Partition coefficient of polyethylene/nanocomposite polypropylene () at 60°C and 80°C for all substances studied.

Model migrant	Temperature	Time		Model migrant	Temperature	Time
Benzophenone		40 days	0.35	DPP		40 days	0.13
	60°C	55 days	0.33		60°C	55 days	0.07
		70 days	0.34			70 days	0.10
		25 days	—			25 days	0.10
	80°C	40 days	0.48		80°C	40 days	0.09
		60 days	0.45			60 days	0.12
DPBD		40 days	0.20	BHT		40 days	0.67
	60°C	55 days	0.18		60°C	55 days	0.55
		70 days	0.20			70 days	0.55
		25 days	—			25 days	0.84
	80°C	40 days	0.27		80°C	40 days	0.79
		60 days	0.32			60 days	0.97
Uvitex OB		40 days	11.57	Bisphenol A		40 days	0.87
	60°C	55 days	12.58		60°C	55 days	0.91
		70 days	4.67			70 days	0.60
		25 days	—			25 days	—
	80°C	40 days	1.35		80°C	40 days	0.15
		60 days	1.73			60 days	0.11
ITX		40 days	0.41	Triclosan		40 days	0.05
	60°C	55 days	0.37		60°C	55 days	0.05
		70 days	0.41			70 days	0.04
		25 days	0.57			25 days	—
	80°C	40 days	0.60		80°C	40 days	0.06
		60 days	0.60			60 days	0.06