Effects of Vulcanization and Plasticization on Microstructure and Properties of ACM/PP Thermoplastic Vulcanizates

doi:10.19491/j.issn.1001-9278.2020.08.004

Abstract

Abstract:

Maleic?modified polypropylene was used as a compatibilizer to prepared ACM/PP thermoplastic vulcanizates (TPV), and the effects of trithiocyanuric acid (TCY) and dicumyl peroxide (DCP) as vulcanizaters and dioctyl phthalate (DOP) as a plasticizer on the microstructure and physical properties of TPV were investigated. The results indicated that DCP exhibited a better vulcanizing effect than TCY, and the obtained TPV presented a desired microstructure and phase structure. The TPV achieved the optimum tensile and tear properties when 2 phr of DOC was incorporated, and it also showed the excellent compression set and oil resistance. The introduction of DCP decreased the hardness of TPV but enhanced its elasticity. A fine microstructure and good physical properties and elasticity were achieved for the TPV when 30 phr of DOP was added, and meanwhile the hardness was reduced effectively.

Key words: acrylate rubber, thermoplastic vulcanizate, the microsructure, mechanical property

CLC Number:

TQ334.9

Jie WANG, Jibin HAN, Weidong WU, Hui LI, Jun LI, Hongshi JIANG. Effects of Vulcanization and Plasticization on Microstructure and Properties of ACM/PP Thermoplastic Vulcanizates[J]. China Plastics, 2020, 34(8): 24-29.

Figures/Tables 6

References 11

1	G 霍尔登. 热塑性弹性体[M]. 化学工业出版社, 北京, 2000: 68⁃70.
2	WONG⁃ON J, WOOTTHIKANO J. Dynamic Vulcanization of Acrylic Rubber⁃Blended PVC[J]. Journal of Applied Polymer Science, 2003, 88(11): 2 657⁃2 663.
3	ABDOU⁃SABET S, PUYDAK R C, RADER C P. Dynamically Vulcanized Thermoplastic Elastomers[J]. Rubber Chemistry & Technology, 1996, 69(3): 476⁃494.
4	季行行, 李诚亮, 史新妍. 动态硫化制备丙烯酸酯橡胶/聚乳酸共混物的结构与性能[J]. 合成橡胶工业, 2019, 42(1): 6⁃11.
	JI X X, LI C L, SHI X Y. Structure and Properties of Acrylate Rubber /Polylactic Acid Blends Prepared by Dynamic Vulcanization[J]. China Synthetic Rubber Industry, 2019, 42(1): 6⁃11.
5	ANHIJIT J, ANIL K. Mechanical and Dynamic Mechanical Thermal Properties of Heat and Oil Resistant Thermoplastic Elastomeric Blends of Poly(butylene terephthalate) and Acrylate Rubber[J]. Journal of Applied Polymer Science, 2000, 78(5): 1 001⁃1 008.
6	于海宁, 韩吉彬, 段红云,等. 动态硫化丙烯酸酯橡胶/聚对苯二甲酸乙二醇酯热塑性弹性体补强体系的研究[J]. 橡胶工业, 2013, 60(9): 551⁃554.
	YU H N, HAN J B, DUAN H Y,et al. Study on Reinforcing System of Acrylate Rubber/ Polyethylene Terephthalate Thermoplastic Vulcanizates[J]. China Rubber Industry, 2013, 60(9): 551⁃554.
7	李梅, 赵江, 陈弦. 硫化剂含量对 ACM/PA6 共混物结晶性能的影响[J]. 塑料工业, 2014, 42(4): 94⁃96.
	LI M, ZHAO J, CHEN X. Effect of Curing Agent Content on the Crystallinity of ACM/PA6 Blends[J]. China Plastics Industry, 2014, 42(4): 94⁃96.
8	LI S Q, LV Y F, SHENG J, et al. Morphology Development of POE/PP Thermoplastic Vulcanizates (TPVs) during Dynamic Vulcanization[J]. European Polymer Journal, 2017, 93: 590⁃601.
9	PRANAB D, KINSUK N, GOLOK B. Theoretical and Morphological Evaluation of Dynamic Viscoelasticity and Thermo⁃Mechanical Characteristics of TPV Composites[J]. Polymer, 2015, 70: 161⁃172.
10	SHAHBIKIAN S, CARREAUA P J, HEUZEY M, et al. Morphology Development of EPDM/PP Uncross⁃Linked/Dynamically Cross⁃Linked Blends[J]. Polymer Engineering & Science, 2012, 52(2): 309⁃322.
11	CHEN Y K, YUAN D S, XU C H. Dynamically Vulcanized Bio⁃based Polylactide/Natural Rubber Blend Material with Continuous Cross⁃linked Rubber Phase[J]. Appl Mater Interfaces, 2014, (6): 3 811⁃3 816.

样品编号	ACM含量	PP含量	MP含量	DCP含量	TCY含量	促进剂BZ含量	氧化锌含量	硬脂酸含量	抗氧剂1010含量	DOP含量
1^#	70	25	5	-	2	1.5	6	2	1	30
2^#	70	25	5	0.5	-	1.5	6	2	1	30
3^#	70	25	5	2	-	1.5	6	2	1	30
4^#	70	25	5	3.5	-	1.5	6	2	1	30
5^#	70	25	5	2	-	1.5	6	2	1	10
6^#	70	25	5	2	-	1.5	6	2	1	50

样品编号	ACM含量	PP含量	MP含量	DCP含量	TCY含量	促进剂BZ含量	氧化锌含量	硬脂酸含量	抗氧剂1010含量	DOP含量
1^#	70	25	5	-	2	1.5	6	2	1	30
2^#	70	25	5	0.5	-	1.5	6	2	1	30
3^#	70	25	5	2	-	1.5	6	2	1	30
4^#	70	25	5	3.5	-	1.5	6	2	1	30
5^#	70	25	5	2	-	1.5	6	2	1	10
6^#	70	25	5	2	-	1.5	6	2	1	50

硫化剂种类	硫化剂含量/份	肖A硬度	100 %定伸应力/MPa	拉伸强度/MPa	断裂伸长率/%	撕裂强度/kN.m^-1	压缩永久变形/%	耐油性能，质量变化率/%
TCY	2.0	76±1	2.3±0.2	3.0±0.1	158±12	5.1±0.3	40±2	-5.8±0.1
DCP	0.5	72±1	2.5±0.1	2.6±0.2	186±15	4.7±0.3	44±3	-6.0±0.2
DCP	2.0	78±1	4.0±0.1	6.1±0.1	228±9	8.2±0.2	33±2	-4.7±0.1
DCP	3.5	81±1	4.1±0.1	5.9±0.1	204±14	7.9±0.2	31±2	-4.5±0.1

硫化剂种类	硫化剂含量/份	肖A硬度	100 %定伸应力/MPa	拉伸强度/MPa	断裂伸长率/%	撕裂强度/kN.m^-1	压缩永久变形/%	耐油性能，质量变化率/%
TCY	2.0	76±1	2.3±0.2	3.0±0.1	158±12	5.1±0.3	40±2	-5.8±0.1
DCP	0.5	72±1	2.5±0.1	2.6±0.2	186±15	4.7±0.3	44±3	-6.0±0.2
DCP	2.0	78±1	4.0±0.1	6.1±0.1	228±9	8.2±0.2	33±2	-4.7±0.1
DCP	3.5	81±1	4.1±0.1	5.9±0.1	204±14	7.9±0.2	31±2	-4.5±0.1

DOP含量/份	肖A 硬度	100 %定伸应力/ MPa	拉伸强度/ MPa	断裂伸长率/ %	撕裂强度/ kN^·m^-1	压缩永久变形/ %	耐油性能，质量变化率/%
0	89±1	6.1±0.4	7.5±0.2	279±16	11.2±0.5	36±1	-3.8±0.1
10	87±2	4.9±0.2	7.3±0.2	257±11	10.6±0.3	35±1	-4.0±0.1
30	78±1	4.0±0.2	6.1±0.2	228±8	8.2±0.4	33±1	-4.7±0.4
50	62±3	2.4±0.5	3.2±0.1	195±13	7.1±0.7	43±3	-6.2±0.8