ABS/PET/PETG合金非等温结晶动力学

doi:10.7503/cjcu20170832

摘要/Abstract

摘要：

以聚对苯二甲酸乙二醇酯-1,4-环己烷二甲醇酯(PETG)作为丙烯腈-丁二烯-苯乙烯(ABS)/聚对苯二甲酸乙二醇酯(PET)合金的增容剂, 探讨了PETG用量对合金力学性能的影响, 并通过差示扫描量热(DSC)仪研究了PET, ABS/PET和ABS/PET/PETG的非等温结晶动力学过程, 使用Jeziorny法对合金的非等温动力学数据进行分析, 计算得到相应动力学参数. 研究结果表明, 随着PETG加入量的增多, 合金的冲击性能和断裂伸长率明显增加, 拉伸强度和弯曲强度稍有降低, 结晶度降低, 结晶速率稍有降低.

关键词: 非等温结晶, 差示扫描量热法, 复合材料, 丙烯腈-丁二烯-苯乙烯/聚对苯二甲酸乙二醇酯, 聚对苯二甲酸乙二醇酯-1, 4-环己烷二甲醇酯

Abstract:

Acrylonitrile-butadiene-styrene(ABS)/polyethylene terephthalate(PET) alloy were compatibilized by polyethylene terephthalate-1,4-cyclohexanedimethanol(PETG). The effects of the amount of PETG on the mechanical properties were investigated. The nonisothermal crystallization kinetics of PET, ABS/PET and ABS/PET/PETG were studied via different scanning calorimeter(DSC). The Jeziorny method was employed to analyze the nonisothermal kinetics of alloys, and the corresponding kinetic parameters were obtained by calculation. The results showed that the impact strength and elongation at break were increased significantly along with the amount of PETG. But the tensile strength and flexural strength were slightly lower. The crystallinity decreased and the crystallization rate decreased slightly with the amount of PETG increased.

Key words: Nonisothermal crystallization, Differential scanning calorimetry, Composite material, Acrylonitrile-butadiene-styrene/polyethylene terephthalate, Polyethylene terephthalate-1, 4-cyclohexanedimethanol

中图分类号:

O631

TrendMD:

王美琳, 刘玉东, 刘晓丽, 李志英, 刘凤岐. ABS/PET/PETG合金非等温结晶动力学. 高等学校化学学报, 2018, 39(6): 1290.

WANG Meilin, LIU Yudong, LIU Xiaoli, LI Zhiying, LIU Fengqi. Nonisothermal Crystallization Kinetics of ABS/PET/PETG Alloy^†. Chem. J. Chinese Universities, 2018, 39(6): 1290.

图/表 8

参考文献 19

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Sample	Izod impact strength/(kJ·m^-2)	Tensile strength/MPa	Extension at break(%)	Flexural strength/MPa
Ⅰ	2.0	44.8	5.5	73.5
Ⅱ	1.5	54.0	11.3	71.5
Ⅲ	2.6	53.2	14.8	70.2
Ⅳ	3.5	53.2	17.0	69.4
Ⅴ	5.0	52.6	21.8	67.8
Ⅳ	3.6	51.7	20.3	65.7
Ⅶ	2.5	51.6	11.3	64.4

Sample	Izod impact strength/(kJ·m^-2)	Tensile strength/MPa	Extension at break(%)	Flexural strength/MPa
Ⅰ	2.0	44.8	5.5	73.5
Ⅱ	1.5	54.0	11.3	71.5
Ⅲ	2.6	53.2	14.8	70.2
Ⅳ	3.5	53.2	17.0	69.4
Ⅴ	5.0	52.6	21.8	67.8
Ⅳ	3.6	51.7	20.3	65.7
Ⅶ	2.5	51.6	11.3	64.4

Sample	ϕ/(℃·min^-1)	T₀/℃	T_P/℃	t_1/2/min	ΔH/(J·g^-1)	X_c(%)
Ⅰ	5	216.21	209.80	2.06	36.26	28.92
	10	209.44	199.02	1.46	36.83	29.37
	20	200.08	186.05	0.90	31.71	25.29
	30	194.40	175.85	0.91	32.45	25.88
	40	190.66	168.10	0.76	23.71	18.91
Ⅱ	5	223.81	219.38	1.43	13.52	10.78
	10	217.82	212.37	0.98	14.97	11.94
	20	210.89	204.19	0.57	14.23	11.35
	30	205.83	198.42	0.49	14.83	11.83
	40	201.59	193.37	0.36	13.94	11.12
Ⅲ	5	223.98	220.65	1.30	15.91	12.69
	10	218.04	213.62	0.82	15.62	12.46
	20	210.94	205.28	0.49	15.44	12.31
	30	205.79	199.03	0.38	15.40	12.28
	40	201.68	194.10	0.40	16.08	12.82
Ⅳ	5	222.54	217.61	1.69	12.16	9.70
	10	216.38	209.68	0.93	11.71	9.34
	20	208.66	200.44	0.64	13.01	10.37
	30	202.97	193.84	0.50	13.04	10.40
	40	198.36	187.97	0.45	13.70	10.93
Ⅴ	5	219.13	213.03	1.69	11.90	9.49
	10	211.15	203.84	1.05	11.65	9.29
	20	202.53	192.90	0.73	12.93	10.31
	30	196.31	184.51	0.58	12.63	10.07
	40	191.76	177.65	0.57	13.71	10.93
Ⅵ	5	213.45	207.65	1.73	10.42	8.31
	10	204.88	197.12	1.29	11.71	9.34
	20	194.84	183.98	0.81	11.04	8.80
	30	187.20	173.80	0.69	10.59	8.44
	40	180.20	163.97	0.52	7.68	6.12

Sample	ϕ/(℃·min^-1)	T₀/℃	T_P/℃	t_1/2/min	ΔH/(J·g^-1)	X_c(%)
Ⅰ	5	216.21	209.80	2.06	36.26	28.92
	10	209.44	199.02	1.46	36.83	29.37
	20	200.08	186.05	0.90	31.71	25.29
	30	194.40	175.85	0.91	32.45	25.88
	40	190.66	168.10	0.76	23.71	18.91
Ⅱ	5	223.81	219.38	1.43	13.52	10.78
	10	217.82	212.37	0.98	14.97	11.94
	20	210.89	204.19	0.57	14.23	11.35
	30	205.83	198.42	0.49	14.83	11.83
	40	201.59	193.37	0.36	13.94	11.12
Ⅲ	5	223.98	220.65	1.30	15.91	12.69
	10	218.04	213.62	0.82	15.62	12.46
	20	210.94	205.28	0.49	15.44	12.31
	30	205.79	199.03	0.38	15.40	12.28
	40	201.68	194.10	0.40	16.08	12.82
Ⅳ	5	222.54	217.61	1.69	12.16	9.70
	10	216.38	209.68	0.93	11.71	9.34
	20	208.66	200.44	0.64	13.01	10.37
	30	202.97	193.84	0.50	13.04	10.40
	40	198.36	187.97	0.45	13.70	10.93
Ⅴ	5	219.13	213.03	1.69	11.90	9.49
	10	211.15	203.84	1.05	11.65	9.29
	20	202.53	192.90	0.73	12.93	10.31
	30	196.31	184.51	0.58	12.63	10.07
	40	191.76	177.65	0.57	13.71	10.93
Ⅵ	5	213.45	207.65	1.73	10.42	8.31
	10	204.88	197.12	1.29	11.71	9.34
	20	194.84	183.98	0.81	11.04	8.80
	30	187.20	173.80	0.69	10.59	8.44
	40	180.20	163.97	0.52	7.68	6.12

Sample	ϕ/(℃·min^-1)	n	K	K_c	Sample	ϕ/(℃·min^-1)	n	K	K_c
Ⅰ	5	3.339	0.042	0.530	Ⅳ	5	3.373	0.095	0.625
	10	3.389	0.164	0.835		10	3.145	0.782	0.976
	20	3.090	0.888	0.994		20	3.429	2.751	1.052
	30	2.914	1.089	1.003		30	3.159	7.469	1.069
	40	3.066	1.389	1.008		40	3.176	11.262	1.062
Ⅱ	5	2.852	0.342	0.807	Ⅴ	5	3.073	0.136	0.671
	10	3.146	1.034	1.003		10	3.332	0.458	0.925
	20	3.717	5.346	1.087		20	2.934	2.046	1.036
	30	3.932	12.526	1.088		30	3.799	3.799	1.045
	40	3.606	31.782	1.090		40	3.090	4.396	1.038
Ⅲ	5	3.488	1.281	1.051	Ⅵ	5	3.132	0.117	0.651
	10	4.161	1.110	1.010		10	3.148	0.364	0.904
	20	3.971	9.530	1.119		20	3.212	1.296	1.013
	30	3.831	25.646	1.114		30	3.227	1.976	1.023
	40	5.041	38.050	1.095		40	2.680	4.407	1.038