Effects of Thermal and Solvent Aging on Breakdown Voltage of TPE, PBT/PET Alloy, and PBT Insulated Low Voltage Electric Wire

Table 4

BDV changes of the TPE1, TPE2, PBT, and Alloy in various solvents.

Sample code	Breakdown voltage (kV)
	Thermally aged	Thermally aged in solvent
		Toluene	Xylene	TCB	NMP
TPE1	11.7±0.8	6.2±0.2	4.0±0.3	4.6±0.5	4.5±0.8
TPE1-60°C-6 h	11.9±0.7	5.6±0.6	3.7±0.5	4.7±1.5	3.1±0.5
TPE1-120°C-6 h	7.8±1.4	5.2±0.8	3.0±0.5	4.3±0.9	0.5±0.1
TPE1-180°C-6 h	5.8±1.5	—	—	—	—
TPE2	14.8±1.2	14.2±1.2	13.1±1.1	13.9±1.2	12.1±1.1
TPE2-60°C-6 h	13.6±0.8	13.2±1.0	12.6±1.2	11.7±0.9	8.5±0.2
TPE2-120°C-6 h	11.0±1.1	12.8±1.4	11.9±0.8	11.3±1.2	1.2±0.1
TPE2-180°C-6 h	10.2±1.3	—	—	—	—
PBT	13.7±1.7	13.0±1.7	12.4±1.5	12.4±0.8	11.8±1.1
PBT-60°C-6 h	12.1±1.3	12.2±0.8	12.2±1.0	11.0±2.7	8.3±0.1
PBT-120°C-6 h	10.5±1.4	11.8±1.9	11.0±1.5	10.9±1.6	0.7±0.1
PBT-180°C-6 h	9.0±1.5	—	—	—	—
Alloy	12.9±1.2	12.3±2.1	11.0±1.9	8.1±1.2	6.1±0.4
Alloy-60°C-6 h	11.9±1.3	9.4±1.2	8.3±0.9	6.1±0.7	3.7±0.1
Alloy-120°C-6 h	9.1±3.0	9.0±1.8	8.9±2.6	4.7±0.6	0.5±0.1
Alloy-180°C-6 h	9.5±1.8	—	—	—	—