Home

Citation: Tang Liming, Guo Wei, Liu Deshan, Zhou Qixiang. Crosslinking Mechanism between Acetoacetylated Polyacrylate and Vinyl-ended Polyurethane[J]. Chinese Journal of Applied Chemistry, ;1997, 14(2): 78-80. shu

Crosslinking Mechanism between Acetoacetylated Polyacrylate and Vinyl-ended Polyurethane

1.
Department of Chemical Engineering, Tsinghua University, Beijing 100084

Received Date: 20 August 1996
Available Online: 5 December 1996

An acetoacetylated polyacrylate and a vinylic groups-ended polyurethane were synthesized. In the presence of a basic catalyst, they can crosslink with each other via the Michael reaction to prepare a thermoset coating at ambient temperature. A model of this crosslinking system, the reaction of ethyl acetoacetate (EAA) with methyl acrylate (MA), was designed to investigate the crosslinking mechanism. The results indicate that the two active hydrogen atoms of the acetoacetyl functionality can participate in the reaction and both mono-and bis-adducts are formed. The yield of bis-adduct increased with decreasing feeding molar ratio of EAA and MA. Two composite coatings with molar ratios of acetoacetyl content of polyacrylate to double bond content of polyurethane being 0 6/1 and 1/1 were prepared. The former coating showed higher crosslinking degree and better properties than the latter one.
- acetoacetylate,
- polyacrylate,
- polyurethane,
- vinylic group,
- crosslinking mechanism
1. [1]
  Zijian Zhao , Yanxin Shi , Shicheng Li , Wenhong Ruan , Fang Zhu , Jijun Jiang . A New Exploration of the Preparation of Polyacrylic Acid by Free Radical Polymerization Based on the Concept of Green Chemistry. University Chemistry, 2024, 39(5): 315-324. doi: 10.3866/PKU.DXHX202311094
2. [2]
  Peng XU , Shasha WANG , Nannan CHEN , Ao WANG , Dongmei YU . Preparation of three-layer magnetic composite Fe₃O₄@polyacrylic acid@ZiF-8 for efficient removal of malachite green in water. Chinese Journal of Inorganic Chemistry, 2024, 40(3): 544-554. doi: 10.11862/CJIC.20230239
3. [3]
  Kai Yang , Gehua Bi , Yong Zhang , Delin Jin , Ziwei Xu , Qian Wang , Lingbao Xing . Comprehensive Polymer Chemistry Experiment Design: Preparation and Characterization of Rigid Polyurethane Foam Materials. University Chemistry, 2024, 39(4): 206-212. doi: 10.3866/PKU.DXHX202308045
4. [4]
  Haofan Niu , Yuhan Wu , Xinran Li , Longmei Li , Dong Wang , Yongce Zhang , Fengyu Liu , Wei Bai . 自驱动固体酸催化乙酸苄酯的合成. University Chemistry, 2026, 41(1): 1-8. doi: 10.12461/PKU.DXHX202505049
5. [5]
  Shuying Zhu , Shuting Wu , Ou Zheng . Improvement and Expansion of the Experiment for Determining the Rate Constant of the Saponification Reaction of Ethyl Acetate. University Chemistry, 2024, 39(4): 107-113. doi: 10.3866/PKU.DXHX202310117
6. [6]
  Ruitong Zhang , Zhiqiang Zeng , Xiaoguang Zhang . Improvement of Ethyl Acetate Saponification Reaction and Iodine Clock Reaction Experiments. University Chemistry, 2024, 39(8): 197-203. doi: 10.3866/PKU.DXHX202312004
7. [7]
  Jianqiang Zheng , Yongbin Huang , Wencan Ming , Yingju Liu . Intelligent Reaction Optimization: Synthesis of Acetylsalicylic Acid Driven by Deep Learning and Optimization Algorithms. University Chemistry, 2025, 40(9): 87-98. doi: 10.12461/PKU.DXHX202411062
8. [8]
  Junke LIU , Kungui ZHENG , Wenjing SUN , Gaoyang BAI , Guodong BAI , Zuwei YIN , Yao ZHOU , Juntao LI . Preparation of modified high-nickel layered cathode with LiAlO₂/cyclopolyacrylonitrile dual-functional coating. Chinese Journal of Inorganic Chemistry, 2024, 40(8): 1461-1473. doi: 10.11862/CJIC.20240189
9. [9]
  Jiaojiao Yu , Bo Sun , Na Li , Cong Wen , Wei Li . Improvement of Classical Organic Experiment Based on the “Reverse-Step Optimization Method”: Taking Synthesis of Ethyl Acetate as an Example. University Chemistry, 2025, 40(3): 333-341. doi: 10.12461/PKU.DXHX202405177
10. [10]
  Xudong Liu , Huili Fan , Junping Xiao , Min Yang , Yan Li . Teaching Approaches to the A_E + A_N Mechanism of Electrophilic Addition Reactions between Olefins and Inorganic Acids in Organic Chemistry. University Chemistry, 2025, 40(7): 367-372. doi: 10.12461/PKU.DXHX202409041
11. [11]
  Guang Huang , Lei Li , Dingyi Zhang , Xingze Wang , Yugai Huang , Wenhui Liang , Zhifen Guo , Wenmei Jiao . Cobalt’s Valor, Nickel’s Foe: A Comprehensive Chemical Experiment Utilizing a Cobalt-based Imidazolate Framework for Nickel Ion Removal. University Chemistry, 2024, 39(8): 174-183. doi: 10.3866/PKU.DXHX202311051
12. [12]
  Qingyu Yang , Yuanhai Yu , Yanliu Wu , Ting Yang , Le Zhong , Wenhong Ruan , Jie Li . Digital Intelligence-Empowered Exploration of Copolymerized Polyacrylonitrile Synthesis and Application Experiments for Carbon Fiber Precursors. University Chemistry, 2026, 41(1): 41-56. doi: 10.12461/PKU.DXHX202506010
13. [13]
  Jingxuan Zhang , Weihao Jiang , Siyuan Zhang , Hongye Tian , Ziye Huang , Lin Huang , Qikun Wu , Jing Yang , Yibin Jiang , Cheng Wang . Automation and AI-Assisted Investigation of the Chemical Reactivity of Sulfosalicylic Acid. University Chemistry, 2026, 41(1): 332-345. doi: 10.12461/PKU.DXHX202505108
14. [14]
  Kexin Feng , Jie Zhang , Yujia Sun , Qiong Ai , Longchun Li . 乙酰二茂铁和二茂铁甲酰丙酮的合成、纯化及表征. University Chemistry, 2025, 40(8): 307-314. doi: 10.12461/PKU.DXHX202409045
15. [15]
  Xiuyun Wang , Jiashuo Cheng , Yiming Wang , Haoyu Wu , Yan Su , Yuzhuo Gao , Xiaoyu Liu , Mingyu Zhao , Chunyan Wang , Miao Cui , Wenfeng Jiang . Improvement of Sodium Ferric Ethylenediaminetetraacetate (NaFeEDTA) Iron Supplement Preparation Experiment. University Chemistry, 2024, 39(2): 340-346. doi: 10.3866/PKU.DXHX202308067
16. [16]
  Weilai Yu , Chuanbiao Bie . Unveiling S-Scheme Charge Transfer Mechanism. Acta Physico-Chimica Sinica, 2024, 40(4): 2307022-0. doi: 10.3866/PKU.WHXB202307022
17. [17]
  Hongyu Cheng , Ruiyao Wang , Xingwen Sun . Mechanistic Study of the Classic Hofmann Elimination Reaction. University Chemistry, 2025, 40(12): 187-191. doi: 10.12461/PKU.DXHX202510104
18. [18]
  Xiaojing Tian , Zhichun Huang , Qingsong Zhang , Xu Wang , Ning Yang , Nanping Deng . PNIPAm Thermo-Responsive Nanofibers Mats: Morphological Stability and Response Behavior under Cross-Linking. Acta Physico-Chimica Sinica, 2024, 40(4): 2304037-0. doi: 10.3866/PKU.WHXB202304037
19. [19]
  Chunyuan Kang , Xiaoyu Li , Fan Yang , Bai Yang . Ionic-bond crosslinked carbonized polymer dots for tunable and enhanced room temperature phosphorescence. Acta Physico-Chimica Sinica, 2026, 42(1): 100156-0. doi: 10.1016/j.actphy.2025.100156
20. [20]
  Ping Song , Nan Zhang , Jie Wang , Rui Yan , Zhiqiang Wang , Yingxue Jin . Experimental Teaching Design on Synthesis and Antitumor Activity Study of Cu-Pyropheophorbide-a Methyl Ester. University Chemistry, 2024, 39(6): 278-286. doi: 10.3866/PKU.DXHX202310087

Get Citation

PDF

XML

Metrics

PDF Downloads(0)
Abstract views(576)
HTML views(40)

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Address：Zhongguancun North First Street 2,100190 Beijing, PR China Tel: +86-010-82449177-888

DownLoad: Full-Size Img PowerPoint

Return