Preparation and properties of PP/PE⁃LD/NX8000K blends with high toughness and great transparency

doi:10.19491/j.issn.1001-9278.2021.12.004

Abstract

Abstract:

In this paper， low-density polyethylene （PE-LD） and NX8000K nucleating agent were blended with polypropylene （PP） to enhance the toughness and transparency of PP. Differential scanning calorimetry， X-ray diffraction analysis， polarized light microscope analysis， haze test analysis and impact test analysis were used to characterize the crystallization behavior， crystal morphology， transparency and mechanical properties of the resultant PP compounds. PE-LD could prevent PP from crystallization PP and reduce its crystallinity， thus reducing the fog of the compounds. A combination of PE-LD and PP could improve the toughness of the compounds significantly. When 50 wt% PE-LD and 0.6 wt% NX8000K nucleating agent were incorporated， the PP/PE-LD/NX8000K composite exhibited a haze value of 16.43 %. The compounds presented impact strength of 77.94 kJ/m²， which was lower than that of pure PP by 45.18 %. However， their impact strength increased by 1 465 %.

Key words: polypropylene, low-density polyethylene, nucleating agent, transparency, mechanical property

CLC Number:

TQ327

LIN Haichuan, ZHANG Qi, LU Jing, MA Qing, YUAN Wei, LUO Faliang. Preparation and properties of PP/PE⁃LD/NX8000K blends with high toughness and great transparency[J]. China Plastics, 2021, 35(12): 21-26.

Figures/Tables 9

References 19

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样品名称	PP	PE?LD	NX8000K
PP	100	0	0
PP/10PE?LD	90	10	0
PP/20PE?LD	80	20	0
PP/30PE?LD	70	30	0
PP/40PE?LD	60	40	0
PP/50PE?LD	50	50	0
PP/60PE?LD	40	60	0
PP/50PE?LD/0.2NX8000K	49.9	49.9	0.2
PP/50PE?LD/0.4NX8000K	49.8	49.8	0.4
PP/50PE?LD/0.6NX8000K	49.7	49.7	0.6
PP/50PE?LD/0.8NX8000K	49.6	49.6	0.8

样品名称	PP	PE?LD	NX8000K
PP	100	0	0
PP/10PE?LD	90	10	0
PP/20PE?LD	80	20	0
PP/30PE?LD	70	30	0
PP/40PE?LD	60	40	0
PP/50PE?LD	50	50	0
PP/60PE?LD	40	60	0
PP/50PE?LD/0.2NX8000K	49.9	49.9	0.2
PP/50PE?LD/0.4NX8000K	49.8	49.8	0.4
PP/50PE?LD/0.6NX8000K	49.7	49.7	0.6
PP/50PE?LD/0.8NX8000K	49.6	49.6	0.8

样品组成	T_m/℃	T_onset/℃	T_c/℃	（T_onset-T_c）/℃	ΔH/J^.g^?1	X_c/%
PP	162.58	118.00	113.59	4.41	89.82	43.0
PP/10PE?LD	162.05	117.83	113.48	4.35	87.41	41.8
PP/30PE?LD	161.81	117.12	112.86	4.26	66.88	32.0
PP/50PE?LD	161.61	116.88	112.70	4.18	50.05	23.9
PP/50PE?LD/0.2NX8000K	164.20	125.54	124.86	0.68	54.42	26.0
PP/50PE?LD/0.4NX8000K	165.86	133.77	131.98	1.79	51.32	24.6
PP/50PE?LD/0.6NX8000K	166.27	135.07	132.48	2.54	48.82	23.4
PP/50PE?LD/0.8NX8000K	166.15	134.76	132.39	2.37	53.66	25.7

样品组成	T_m/℃	T_onset/℃	T_c/℃	（T_onset-T_c）/℃	ΔH/J^.g^?1	X_c/%
PP	162.58	118.00	113.59	4.41	89.82	43.0
PP/10PE?LD	162.05	117.83	113.48	4.35	87.41	41.8
PP/30PE?LD	161.81	117.12	112.86	4.26	66.88	32.0
PP/50PE?LD	161.61	116.88	112.70	4.18	50.05	23.9
PP/50PE?LD/0.2NX8000K	164.20	125.54	124.86	0.68	54.42	26.0
PP/50PE?LD/0.4NX8000K	165.86	133.77	131.98	1.79	51.32	24.6
PP/50PE?LD/0.6NX8000K	166.27	135.07	132.48	2.54	48.82	23.4
PP/50PE?LD/0.8NX8000K	166.15	134.76	132.39	2.37	53.66	25.7

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