Study on Toughening Modification of PLA/PPC Blends with Hyperbranched Ethylenediamine Trazine Polymer

doi:10.19491/j.issn.1001-9278.2020.06.005

Abstract

Abstract:

Hyperbranched ethylenediamine triazine polymer (HBETP) was synthesized by a one?step method using ethylenediamine and cyanuric chloride as raw materials and acetone as a solvent, and then polylactic acid (PLA)/polypropylene carbonate (PPC) blends were prepared by melt blending with HBETP as an impact modifier. The thermal properties, mechanical properties and the cross?sectional morphology of PLA/PPC/HBETP blends were investigated by means of differential scanning calorimetry thermogravimetric analysis, electronic universal testing machine and scanning electron microscopy. The results indicated that the elongation at break and impact strength of the blends increased by 266.0 % and 122.9 %, respectively, when 0.6 phr of HBETP was incorporated. HBETP can act as an effective impact modifier for toughening of PLA/PPC blends.

Key words: polylactic acid, polypropylene carbonate, hyperbranched polymer, modify

CLC Number:

TQ321

Wei ZHAI, Jianjian SUN, Bohua WANG, Chong TENG, Shiyu XIE, Fenghao HAO, Yujuan JIN. Study on Toughening Modification of PLA/PPC Blends with Hyperbranched Ethylenediamine Trazine Polymer[J]. China Plastics, 2020, 34(6): 27-33.

Figures/Tables 10

References 35

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样品编号	PLA含量/g	PPC含量/g	HBETP含量/g
1^#	350	150	0
2^#	350	150	0.5
3^#	350	150	1.0
4^#	350	150	2.0
5^#	350	150	3.0
6^#	350	150	4.0

样品编号	PLA含量/g	PPC含量/g	HBETP含量/g
1^#	350	150	0
2^#	350	150	0.5
3^#	350	150	1.0
4^#	350	150	2.0
5^#	350	150	3.0
6^#	350	150	4.0

样品编号	T_g1/℃	T_g2/℃	ΔT_g/℃
1^#	52.97	30.97	22.00
2^#	55.21	33.89	21.32
3^#	54.36	33.96	20.40
4^#	54.36	33.42	20.94
5^#	54.13	33.71	20.42
6^#	54.53	33.92	20.61

样品编号	T_g1/℃	T_g2/℃	ΔT_g/℃
1^#	52.97	30.97	22.00
2^#	55.21	33.89	21.32
3^#	54.36	33.96	20.40
4^#	54.36	33.42	20.94
5^#	54.13	33.71	20.42
6^#	54.53	33.92	20.61

样品编号	T_5%/℃	T_50%/℃	T_95%/℃	500 ℃残炭率/%
1^#	301.87	343.52	374.46	2.033
2^#	302.58	344.71	373.02	2.059
3^#	300.91	344.33	372.36	1.829
4^#	302.93	347.25	421.61	2.821
5^#	303.13	346.61	376.07	2.096
6^#	303.91	352.71	376.24	2.344