Citation: . MEASUREMENT OF NUMBER AVERAGE MOLECULAR WEIGHT OF STYRENE OLIGOMER BY 13C-NMR METHOD[J]. Chinese Journal of Polymer Science, ;1999, 17(2): 135-140. shu

MEASUREMENT OF NUMBER AVERAGE MOLECULAR WEIGHT OF STYRENE OLIGOMER BY 13C-NMR METHOD

Received Date: 10 November 1997

13C-NMR 1H-decoupled spectra of styrene polymers were assigned by comparison with modelcompounds, then used in measurements of number average molecular weights. The higher limit of an exactdetermination of the end group signal is less than a molecular weight of 104. For polymer samples withMn3, the results obtained from 13C-NMR spectra of saturated carbon region are in excellent agreementwith the values determined by 1H-NMR, SEC, and VPO methods, while the results from 13C-NMR spectra of phenyl C-1 carbon region are somewhta higher than the values determined by other methods.
1. [1]
  Yue Ren , Kang Li , Yi-Zi Wang , Shao-Peng Zhao , Shu-Min Pan , Haojie Fu , Mengfan Jing , Yaming Wang , Fengyuan Yang , Chuntai Liu . Swelling and erosion assisted sustained release of tea polyphenol from antibacterial ultrahigh molecular weight polyethylene for joint replacement. Chinese Chemical Letters, 2025, 36(2): 110468-. doi: 10.1016/j.cclet.2024.110468
2. [2]
  Hualei Xu , Manman Han , Haiqiang Liu , Liang Qin , Lulu Chen , Hao Hu , Ran Wu , Chenyu Yang , Hua Guo , Jinrong Li , Jinxiang Fu , Qichen Hao , Yijun Zhou , Jinchao Feng , Xiaodong Wang . 4-Nitrocatechol as a novel matrix for low-molecular-weight compounds in situ detection and imaging in biological tissues by MALDI-MSI. Chinese Chemical Letters, 2024, 35(6): 109095-. doi: 10.1016/j.cclet.2023.109095
3. [3]
  Qinghong Pan , Huafang Zhang , Qiaoling Liu , Donghong Huang , Da-Peng Yang , Tianjia Jiang , Shuyang Sun , Xiangrong Chen . A self-powered cathodic molecular imprinting ultrasensitive photoelectrochemical tetracycline sensor via ZnO/C photoanode signal amplification. Chinese Chemical Letters, 2025, 36(1): 110169-. doi: 10.1016/j.cclet.2024.110169
4. [4]
  Ruike Hu , Kangmin Wang , Junxiang Liu , Jingxian Zhang , Guoliang Yang , Liqiu Wan , Bijin Li . Extended π-conjugated systems by external ligand-assisted C−H olefination of heterocycles: Facile access to single-molecular white-light-emitting and NIR fluorescence materials. Chinese Chemical Letters, 2025, 36(4): 110113-. doi: 10.1016/j.cclet.2024.110113
5. [5]
  Xinzhi Ding , Chong Liu , Jing Niu , Nan Chen , Shutao Xu , Yingxu Wei , Zhongmin Liu . Solid-state NMR study of the stability of MOR framework aluminum. Chinese Journal of Structural Chemistry, 2024, 43(4): 100247-100247. doi: 10.1016/j.cjsc.2024.100247
6. [6]
  Rongxin Zhu , Shengsheng Yu , Xuanzong Yang , Ruyu Zhu , Hui Liu , Kaikai Niu , Lingbao Xing . Construction of pyrene-based hydrogen-bonded organic frameworks as photocatalysts for photooxidation of styrene in water. Chinese Chemical Letters, 2024, 35(10): 109539-. doi: 10.1016/j.cclet.2024.109539
7. [7]
  Zhiwei Zhong , Yanbin Huang , Wantai Yang . A simple photochemical method for surface fluorination using perfluoroketones. Chinese Chemical Letters, 2024, 35(5): 109339-. doi: 10.1016/j.cclet.2023.109339
8. [8]
  Fang-Yuan Chen , Wen-Chao Geng , Kang Cai , Dong-Sheng Guo . Molecular recognition of cyclophanes in water. Chinese Chemical Letters, 2024, 35(5): 109161-. doi: 10.1016/j.cclet.2023.109161
9. [9]
  Ling-Hao Zhao , Hai-Wei Yan , Jian-Shuang Jiang , Xu Zhang , Xiang Yuan , Ya-Nan Yang , Pei-Cheng Zhang . Effective assignment of positional isomers in dimeric shikonin and its analogs by ¹H NMR spectroscopy. Chinese Chemical Letters, 2024, 35(5): 108863-. doi: 10.1016/j.cclet.2023.108863
10. [10]
  Yanjie Li , Chaoqun Qu , Siqi Meng , Jiaqi Hu , Ze Gao , Hongji Xu , Rui Gao , Ming Feng . Revealing electronic state evolution of Co(Ⅱ)/Co(Ⅲ) in CoO (111) plane during OER process through magnetic measurement. Chinese Chemical Letters, 2025, 36(3): 109872-. doi: 10.1016/j.cclet.2024.109872
11. [11]
  Wenqing Deng , Fanfeng Deng , Ting Zhang , Junjie Lin , Liang Zhao , Gang Li , Yi Pan , Jiebin Yang . Continuous measurement of reactive ammonia in hydrogen fuel by online dilution module coupled with Fourier transform infrared spectrometer. Chinese Chemical Letters, 2025, 36(3): 110085-. doi: 10.1016/j.cclet.2024.110085
12. [12]
  Qian Wang , Ting Gao , Xiwen Lu , Hangchao Wang , Minggui Xu , Longtao Ren , Zheng Chang , Wen Liu . Nanophase separated, grafted alternate copolymer styrene-maleic anhydride as an efficient room temperature solid state lithium ion conductor. Chinese Chemical Letters, 2024, 35(7): 108887-. doi: 10.1016/j.cclet.2023.108887
13. [13]
  Yue Li , Minghao Fan , Conghui Wang , Yanxun Li , Xiang Yu , Jun Ding , Lei Yan , Lele Qiu , Yongcai Zhang , Longlu Wang . 3D layer-by-layer amorphous MoS_x assembled from [Mo₃S₁₃]^2- clusters for efficient removal of tetracycline: Synergy of adsorption and photo-assisted PMS activation. Chinese Chemical Letters, 2024, 35(9): 109764-. doi: 10.1016/j.cclet.2024.109764
14. [14]
  Erzhuo Cheng , Yunyi Li , Wei Yuan , Wei Gong , Yanjun Cai , Yuan Gu , Yong Jiang , Yu Chen , Jingxi Zhang , Guangquan Mo , Bin Yang . Galvanostatic method assembled ZIFs nanostructure as novel nanozyme for the glucose oxidation and biosensing. Chinese Chemical Letters, 2024, 35(9): 109386-. doi: 10.1016/j.cclet.2023.109386
15. [15]
  Keyang Li , Yanan Wang , Yatao Xu , Guohua Shi , Sixian Wei , Xue Zhang , Baomei Zhang , Qiang Jia , Huanhua Xu , Liangmin Yu , Jun Wu , Zhiyu He . Flash nanocomplexation (FNC): A new microvolume mixing method for nanomedicine formulation. Chinese Chemical Letters, 2024, 35(10): 109511-. doi: 10.1016/j.cclet.2024.109511
16. [16]
  Wenxuan Yang , Long Shang , Xiaomeng Liu , Sihan Zhang , Haixia Li , Zhenhua Yan , Jun Chen . Ultrafast synthesis of nanocrystalline spinel oxides by Joule-heating method. Chinese Chemical Letters, 2024, 35(11): 109501-. doi: 10.1016/j.cclet.2024.109501
17. [17]
  Chen Chen , Jinzhou Zheng , Chaoqin Chu , Qinkun Xiao , Chaozheng He , Xi Fu . An effective method for generating crystal structures based on the variational autoencoder and the diffusion model. Chinese Chemical Letters, 2025, 36(4): 109739-. doi: 10.1016/j.cclet.2024.109739
18. [18]
  Shuangying Li , Qingxiang Zhou , Zhi Li , Menghua Liu , Yanhui Li . Sensitive measurement of silver ions in environmental water samples integrating magnetic ion-imprinted solid phase extraction and carbon dot fluorescent sensor. Chinese Chemical Letters, 2024, 35(5): 108693-. doi: 10.1016/j.cclet.2023.108693
19. [19]
  Caihong Mao , Yanfeng He , Xiaohan Wang , Yan Cai , Xiaobo Hu . Synthesis and molecular recognition characteristics of a tetrapodal benzene cage. Chinese Chemical Letters, 2024, 35(8): 109362-. doi: 10.1016/j.cclet.2023.109362
20. [20]
  Cheng-Da Zhao , Huan Yao , Shi-Yao Li , Fangfang Du , Li-Li Wang , Liu-Pan Yang . Amide naphthotubes: Biomimetic macrocycles for selective molecular recognition. Chinese Chemical Letters, 2024, 35(4): 108879-. doi: 10.1016/j.cclet.2023.108879

Get Citation

PDF

XML

Metrics

PDF Downloads(0)
Abstract views(573)
HTML views(9)

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