Preparation and properties of ultraviolet crosslinked high⁃density polyethylene materials

doi:10.19491/j.issn.1001-9278.2024.05.005

Abstract

Abstract:

In this study， high⁃density polyethylene was selected as a base resin， and a suitable photoinitiation system was selected to prepare ultraviolet （UV）⁃crosslinked high⁃density polyethylene （PE⁃Xe）. The formula was optimized and the process was explored. The penetration of ultraviolet light was systematically tested. At the same time， the effects of the amounts of photosensitizer and crosslinker， the power of UV lamp， and line velocity on the crosslinking degree of the PE⁃Xe materials were studied. The results indicated that the penetration ability of ultraviolet light reached 9.5 mm. When the addition amounts of photosensitizer and crosslinking agent was 0.7 wt%， and the UV lamp power was 500 W， the crosslinking degree of the PE⁃Xe material reached over 75 %. The prepared pipe exhibited good pressure resistance， excellent mechanical properties， and a crystalline degree of over 40 %， and its oxidation induction time at 200 ℃ was greater than 20 min.

Key words: ultraviolet crosslinked high?density polyethylene, photoinitiation system, ultraviolet light lamp power, crosslinking degree

CLC Number:

TQ325.1⁺2

DUAN Kaige, CHEN Xiaodie, NI Jia, MEI Zhenwei, ZHOU Chaoxi, YE Xiaoping, ZHU Hui, YU Dongming. Preparation and properties of ultraviolet crosslinked high⁃density polyethylene materials[J]. China Plastics, 2024, 38(5): 24-27.

Figures/Tables 8

References 10

1	鲍光复，傅勇，姜志荣，等.耐热聚乙烯管材料的性能特点及发展概况［J］.现代塑料加工应用，2016，28（6）：28⁃31.
	BAO G F， FU Y， JIANG Z R， et al. Performance characteristics and development of heat⁃resistant polyethylene pipe materials ［J］. Modern Plastics Processing and Application， 2016，28（6）：28⁃31.
2	马小伟，乔亮杰，莫明，等.耐热聚乙烯的加工性能［J］.合成树脂及塑料，2017，34（4）：77⁃80.
	MA X W， QIAO L J， MO M， et al. Processing properties of heat⁃resistant polyethylene［J］. Synthetic Resins and Plastics， 2017，34（4）：77⁃80.
3	王群涛，侯斌，郭锐，等. 管材专用耐热聚乙烯的等温结晶行为［J］. 合成树脂及塑料， 2016， 33（6）： 68⁃70.
	WANG Q T， HIU B， GUO R， et al. Isothermal crystallization behavior of heat resistant polyethylene for pipes［J］. Synthetic Resin and Plastics， 2016， 33（6）： 68⁃70.
4	Oster G， Oster G K， Moroson H. Ultraviolet induced crosslinking and grafting of solid high polymers［J］. Journal of Polymer Science， 1959， 34（127）： 671⁃684.
5	Oster G. Crosslinking of polyethylene with selective wavelengths of ultraviolet light［J］. Journal of Polymer Science， 1956， 22（100）： 185.
6	Yan Qing， Xu Wenying， Rånby B. Photoinitiated crosslinking of low density polyethylene： II.Morphology and properties［J］. Polymer Engineering and Science， 2010， 31（22）： 1 567⁃1 571.
7	Zamotaev P V， Litsov N J， Kachan A A.Photochemical reactions of 9，10⁃anthraquinone and some of its derivatives in polyethylene［J］. Polymer Photochemistry， 1986， 7（2）： 139⁃152.
8	Horie K， Ando H， Mita I. Photochemistry in polymer solids. 8. Mechanism of photoreaction of benzophenone in poly（vinyl alcohol）［J］. Macromolecules， 1987，20（1）： 54⁃58.
9	鲍文波，马树军，贾振山，等. 紫外光辐照交联聚乙烯在电缆行业中的应用及进展［J］. 电线电缆，2009， 4（4）： 4⁃7.
	BAO W B， MA S J， JIA Z S，et al. Application and development of UV⁃irradiated XLPE in the cable industry. Wire & Cable，2009， 4（4）： 4⁃7.
10	路义萍，唐佳东，赵洪，等. 低压电缆紫外光交联辐照箱通风冷却研究［J］. 哈尔滨理工大学学报，2013， 18（1）： 45⁃50.
	LU Y P， TANG J D， ZHAO H，et al. Study of ventilation cooling for an irradiation box of low⁃voltage cable ultraviolet cross⁃linking［J］. Journal of Harbin University of Science and Technology，2013， 18（1）： 45⁃50.

配方编号	PE⁃HD 含量/%	抗氧剂含量/%	交联剂含量/%	光敏剂含量/%	交联度/ %
1	99.35	0.40	0.15	0.10	49.23
2	99.10	0.40	0.30	0.20	63.65
3	99.00	0.40	0.36	0.24	66.23
4	98.90	0.40	0.40	0.30	78.29
5	98.60	0.40	0.60	0.40	81.75
6	98.40	0.40	0.70	0.50	82.65
7	98.00	0.40	1.00	0.60	87.44
8	97.10	0.40	1.50	1.00	88.33

配方编号	PE⁃HD 含量/%	抗氧剂含量/%	交联剂含量/%	光敏剂含量/%	交联度/ %
1	99.35	0.40	0.15	0.10	49.23
2	99.10	0.40	0.30	0.20	63.65
3	99.00	0.40	0.36	0.24	66.23
4	98.90	0.40	0.40	0.30	78.29
5	98.60	0.40	0.60	0.40	81.75
6	98.40	0.40	0.70	0.50	82.65
7	98.00	0.40	1.00	0.60	87.44
8	97.10	0.40	1.50	1.00	88.33

线速度/m·min^-1	交联度/%
0.6	72.14
1.0	71.38
1.4	70.52
1.8	70.03
2.2	67.77

线速度/m·min^-1	交联度/%
0.6	72.14
1.0	71.38
1.4	70.52
1.8	70.03
2.2	67.77

交联功率/W	样片厚度/mm	交联度/%
交联功率/W	样片厚度/mm	正面	背光面
900	7.14	74.56	70.05
	8.35	73.22	69.28
	9.50	70.77	67.57