MZCHANISM OF PHOTOINITIATED CROSSLINKING OF LOW DENSITY POLYETHYLENE IV. 13C NMR Study of H-and Y-type Crosslinks

Chinese Journal of Magnetic Resonance ›› 1995, Vol. 12 ›› Issue (6): 581-591.

Previous Articles Next Articles

MZCHANISM OF PHOTOINITIATED CROSSLINKING OF LOW DENSITY POLYETHYLENE IV. ¹³C NMR Study of H-and Y-type Crosslinks

Qu Baojun, Xu Yunhua, Qu Xin

Structure Rasearch Laboratory, Univereity of Science and Technolagy of China, Hefei 230026

Received:1995-01-23 Revised:1995-03-03 Published:1995-12-05 Online:2018-01-17

Abstract

Abstract: Structures of crosslinks produeed in benzophenone-photoinitiated crosslinking of low density polycthylene(LDPE) have been studied for the firet time by solution-state ¹³C NMR spedroscopy.The H-links and Y-type long branches have been observed and identified.The concentrations of H-and Y-type crosslinks are estimated to be 5.7-16-9 and 7.6-21.6 structure units pcr 10000 carbon atonis with the LDPE samples UV-irradiated for 5-10 seconds in the melt,respectively.

Key words: Low density polyethylene (LDPE), Photocrosslinking, Crosslink structurt, Mechanism, ¹³C NMR

Qu Baojun, Xu Yunhua, Qu Xin. MZCHANISM OF PHOTOINITIATED CROSSLINKING OF LOW DENSITY POLYETHYLENE IV. ¹³C NMR Study of H-and Y-type Crosslinks[J]. Chinese Journal of Magnetic Resonance, 1995, 12(6): 581-591.

[1]	ZHU Xiaofeng, ZHAO Zhihong, TAN Rui, ZHOU Long, WANG Yichuan, LIU Wenjing, ZHANG Minghui, LIU Huabing. Water Migration Characteristics of Pinus Sylvestris During the Drying Process Studied by Single-sided Nuclear Magnetic Resonance [J]. Chinese Journal of Magnetic Resonance, 2024, 41(2): 173-183.
[2]	SONG Linhong, CHAI Xin, ZHANG Xu, JIANG Bin, LIU Maili. Optimizing Sensitivity-enhanced Quantitative ¹³C NMR Experiment by Genetic Algorithm [J]. Chinese Journal of Magnetic Resonance, 2023, 40(4): 365-375.
[3]	SHEN Changzhi, ZHANG Linlin, LI Xin, SHEN Wanling. Hydrothermal Crystallization of Niobium Oxide Nanorods Studied by ⁹³Nb Nuclear Magnetic Resonance [J]. Chinese Journal of Magnetic Resonance, 2023, 40(4): 376-384.
[4]	Li Yijie, YANG Xinyu, YANG Xiaomei. Magnetic Resonance Image Reconstruction of Multi-scale Residual Unet Fused with Attention Mechanism [J]. Chinese Journal of Magnetic Resonance, 2023, 40(3): 307-319.
[5]	ZHAI Chonggang,WANG Pengcheng,SHAN Yubao,LAN Yu,HU Rui,YANG Yunhuang. Structure Characterization and Analgesic Activity of Novel Pyrazolo[3,4-d]pyrimidin-4-one Derivatives [J]. Chinese Journal of Magnetic Resonance, 2023, 40(1): 1-9.
[6]	Rui QIN,Chao WANG,Qiang WANG,Min HU,Jin-lin LI,Jun XU,Feng DENG. Formation and Reactivity of Surface Methoxy Species in Methanol Conversion over SSZ-13 Zeolite [J]. Chinese Journal of Magnetic Resonance, 2022, 39(4): 439-447.
[7]	Meng CHEN, Chen GENG, Yu-xin LI, Dao-ying GENG, Yi-fang BAO, Ya-kang DAI. Automatic Detection for Cerebral Aneurysms in TOF-MRA Images Based on Fuzzy Label and Deep Learning [J]. Chinese Journal of Magnetic Resonance, 2022, 39(3): 267-277.
[8]	Yao XIAO,Chang-jiu XIA,Xian-feng YI,Feng-qing LIU,Shang-bin LIU,An-min ZHENG. Progress in the Studies on Sn-Zeolites by Solid-State Nuclear Magnetic Resonance [J]. Chinese Journal of Magnetic Resonance, 2021, 38(4): 571-584.
[9]	Shu-shu GAO,Shu-tao XU,Ying-xu WEI,Zhong-min LIU. Applications of Solid-State Nuclear Magnetic Resonance Spectroscopy in Methanol-to-Olefins Reaction [J]. Chinese Journal of Magnetic Resonance, 2021, 38(4): 433-447.
[10]	Xiao-li CHEN,Tian-qiao YONG,Cheng CHEN,Juan FU,Jia-mei MO,Qiu-cheng SU. Physical and Chemical Properties of Silicone Electrolyte Materials Evaluated by Nuclear Magnetic Resonance Technology [J]. Chinese Journal of Magnetic Resonance, 2021, 38(3): 291-300.
[11]	Lei JIANG,Yang FU,Wen-wen GUO,Guo ZHENG,Qiang WANG. Nuclear Magnetic Resonance Assignment and Crystal Structure of 3, 22-Dihydroxyhopane [J]. Chinese Journal of Magnetic Resonance, 2021, 38(2): 255-267.
[12]	Xiao-li CHEN,Wei LV,Qiu-cheng SU,Juan FU,Jia-mei MO,Qi-ying LIU. Conversion of Lignocellulose Studied by Nuclear Magnetic Resonance [J]. Chinese Journal of Magnetic Resonance, 2021, 38(2): 277-290.
[13]	WU Ya-xin, CAO Chen-zhong, TENG Li-li. Estimation of Formation Enthalpy for Alkanes from ¹³C NMR Chemical Shifts [J]. Chinese Journal of Magnetic Resonance, 2019, 36(1): 65-73.
[14]	LI Sen, ZHENG Jun-peng, GUO Ming-ming. In Situ Variable-Temperature Multi-Nuclear NMR Studies of the Thermal Decomposition Mechanism of Ionic Liquid [J]. Chinese Journal of Magnetic Resonance, 2017, 34(2): 156-163.
[15]	FU Juan, WU Neng-you, WU Dai-dai, SU Qiu-cheng. A Solid-State ¹³C NMR and Laser Raman Spectroscopy Study on Synthesized Methane Hydrates [J]. Chinese Journal of Magnetic Resonance, 2017, 34(2): 148-155.

MZCHANISM OF PHOTOINITIATED CROSSLINKING OF LOW DENSITY POLYETHYLENE IV. ¹³C NMR Study of H-and Y-type Crosslinks

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments