Study on Modification of PPC/PBS Blends with Epoxy⁃terminated Hyperbranched Polymer

doi:10.19491/j.issn.1001-9278.2021.04.002

Abstract

Abstract:

Poly（propylene carbonate）（PPC）/poly（butylene succinate）（PBS） blends were prepared by melting blending using epoxy?terminated hyperbranched polymer （EHBP） as a modifier and then were characterized by dynamic mechanical analysis，thermogravimetric analysis，tensile and impact measurements，rotational rheometer and scanning electron microscopy. The results indicated that the PPC/PBS/EHBP blends presented a decrease in the difference of glass transition temperature with the addition of EHBP， indicating an improvement in compatibility between PPC and PBS. The blends also exhibited an increase in tensile strength by 68.7 % and in impact strength by 81.2 % at the EHBP content of 0.5 wt%. Their elongation at break also increased by 74.9 % at the content of EHBP of 1.0 wt%. Their complex viscosity was found to decrease with an increase in the EHBP content.

Key words: poly（propylene carbonate）, poly（butylene succinate）, epoxy?terminated hyperbranched polymer, modification

CLC Number:

TQ 321

WU You, WANG Bohua, SUN Jianjian, JIN Yujuan. Study on Modification of PPC/PBS Blends with Epoxy⁃terminated Hyperbranched Polymer[J]. China Plastics, 2021, 35(4): 5-11.

Figures/Tables 11

References 29

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样品编号	PPC 含量/%	PBS 含量/%	EHBP 含量/%	DDM 含量/%
1^#	70.000	30.000	0.0	0.00
2^#	69.895	29.955	0.1	0.05
3^#	69.475	29.775	0.5	0.25
4^#	68.950	29.550	1.0	0.50
5^#	68.425	29.325	1.5	0.75
6^#	67.900	29.100	2.0	1.00

样品编号	PPC 含量/%	PBS 含量/%	EHBP 含量/%	DDM 含量/%
1^#	70.000	30.000	0.0	0.00
2^#	69.895	29.955	0.1	0.05
3^#	69.475	29.775	0.5	0.25
4^#	68.950	29.550	1.0	0.50
5^#	68.425	29.325	1.5	0.75
6^#	67.900	29.100	2.0	1.00

样品	T_g1/oC	T_g2/oC	ΔT_g/oC
1^#	-42.0	35.0	77.0
2^#	-38.0	34.2	72.2
3^#	-37.5	33.6	71.1
4^#	-40.0	33.0	73.0
5^#	-39.7	32.7	72.4
6^#	-39.2	31.5	70.7

样品	T_g1/oC	T_g2/oC	ΔT_g/oC
1^#	-42.0	35.0	77.0
2^#	-38.0	34.2	72.2
3^#	-37.5	33.6	71.1
4^#	-40.0	33.0	73.0
5^#	-39.7	32.7	72.4
6^#	-39.2	31.5	70.7

样品	T_5%/℃	T_50%/℃	T_max1/℃	T_max2/℃	500 ℃ 残炭率/%
1^#	277.0	310.2	302.3	399.1	3.344
2^#	276.9	311.8	298.7	395.6	3.516
3^#	272.4	307.4	292.7	385.5	4.143
4^#	271.6	303.4	287.1	374.9	4.054
5^#	271.0	302.8	286.6	370.9	4.102
6^#	270.8	302.8	285.1	370.4	3.399