胺端基型超支化乙二胺三嗪聚合物对PLA/PPC的增韧改性研究

doi:10.19491/j.issn.1001-9278.2020.06.005

中国塑料 ›› 2020, Vol. 34 ›› Issue (6): 27-33.DOI: 10.19491/j.issn.1001-9278.2020.06.005

胺端基型超支化乙二胺三嗪聚合物对PLA/PPC的增韧改性研究

翟微, 孙健健, 王博华, 滕冲, 谢时宇, 郝凤昊, 靳玉娟()

北京工商大学化学与材料工程学院，北京 100048

收稿日期:2019-12-02 出版日期:2020-06-26 发布日期:2020-06-26
基金资助:
“十三五”时期北京市属高校高水平教师队伍建设支持计划(CIT&TCD201804030);国家自然科学基金青年项目(51503007)

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

Wei ZHAI, Jianjian SUN, Bohua WANG, Chong TENG, Shiyu XIE, Fenghao HAO, Yujuan JIN()

College of Chemistry and Materials Engineering of Beijing Technology and Business University，Beijing 100048，China

Received:2019-12-02 Online:2020-06-26 Published:2020-06-26
Contact: Yujuan JIN E-mail:jinyujuan@th.btbu.edu.cn

摘要/Abstract

摘要：

以乙二胺和三聚氯氰作为原料，以丙酮为溶剂，通过“一步法”合成了胺端基型的超支化乙二胺三嗪聚合物(HBETP)。以HBETP作为改性剂，采用双螺杆挤出机熔融共混和注射成型法制备了聚乳酸(PLA)/聚碳酸亚丙酯(PPC)共混物，并用差示扫描量热仪(DSC)、热失重分析仪(TGA)、电子万能试验机、扫描电字显微镜(SEM)等测试手段对共混物的热性能、力学性能以及断面形貌等进行表征与测试。结果表明，与PLA/PPC共混物相比，当HBETP含量为0.6份时，PLA/PPC/HBETP共混体系在保持拉伸强度基本不变的基础上，断裂伸长率和冲击强度分别提高了266.0 %和122.9 %；HBETP是一种增韧PLA/PPC共混物的有效助剂。

关键词: 聚乳酸, 聚碳酸亚丙酯, 超支化聚合物, 改性

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

中图分类号:

TQ321

翟微, 孙健健, 王博华, 滕冲, 谢时宇, 郝凤昊, 靳玉娟. 胺端基型超支化乙二胺三嗪聚合物对PLA/PPC的增韧改性研究[J]. 中国塑料, 2020, 34(6): 27-33.

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.

图/表 10

图1 HBETP的分子结构示意图

Fig.1 Schematic diagram of HBETP molecular structure

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

表1 PLA/PPC/HBETP共混改性配方表

Tab.1 Formula for the blending modification of PLA/PPC/HBETP

图 2 PLA/PPC/HBETP共混体系的升温DSC曲线

Fig.2 DSC curves for the PLA/PPC/HBETP blends

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

表2 PLA/PPC/HBETP共混体系的升温DSC数据

Tab.2 DSC data of PLA/PPC/HBETP blends

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

表3 PLA/PPC/HBETP共混体系的TGA数据

Tab.3 TGA data of PLA/PPC/HBETP blends

图3 PLA/PPC/HBETP共混体系的TGA曲线

Fig.3 TGA curves of PLA/PPC/HBETP blends

图 4 PLA/PPC/HBETP共混体系的拉伸性能和冲击性能

Fig.4 Tensile and impact property of PLA/PPC/HBETP blends

图5 HBETP对PLA/PPC共混物的改性机理示意图

Fig.5 Modification mechanism of HBETP on PLA/PPC blends

样品编号	凝胶含量/%
1^#	0.71
3^#	1.06
4^#	2.33
6^#	2.62

表4 PLA/PPC/HBETP共混物的凝胶含量

Tab.4 Gel contents of PLA/PPC/HBETP blends

图6 PLA/PPC/HBETP共混体系的SEM照片

Fig.6 SEM of PLA/PPC/HBETP blends

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胺端基型超支化乙二胺三嗪聚合物对PLA/PPC的增韧改性研究

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

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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	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	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