Home

Citation: Guo Li-Ping, Han Fu-Tian, Cheng Zhi-Xu. Two Phases Separation and Its Reliability Analysis of Semicrystalline Polyethylene Terephthalate[J]. Acta Physico-Chimica Sinica, ;2002, 18(04): 372-376. doi: 10.3866/PKU.WHXB20020418 shu

Two Phases Separation and Its Reliability Analysis of Semicrystalline Polyethylene Terephthalate

1.
China Institute of Atomic Energy,Beijing　102413;Chinese National Analytical Centre,Guangzhou　510070

Received Date: 15 August 2001
Available Online: 15 April 2002

The Xray diffraction whole pattern (XDWP) data of semicrystalline poly(ethylene terephthalate) PET2 sample were collected in the symmetric reflection geometry on a diffractometer employing a copper target (Kα wavelength 0.15418 nm )(see Fig.1 ).The XDWP was fitted by combining the Rietveld method and Fourier filtering technique,Rietveld structure refinement for PET2 crystalline phase was performed,the unitcell parameters obtained are a =0.445 nm,b=0.592 nm,c =1.072 nm,α= 99.6(°),β= 116.9(°),γ= 111.9 (°),the density of the crystals is dc = 1.495 g•cm－3(see Table 1) .Meanwhile the XDWP was separated into two parts,CR2 crystalline region and AM2 noncrystalline region in PET2 (see Fig.2).The reduced radial distribution function G2(r) was calculated from AM2 and lead to three main peaks,G21(r) = 0.150 nm,G22(r) = 0.254 nm,G23(r)=0.460 nm which characterize the structure of the noncrystalline phase in PET2 (see Fig.3).The result shows that this combination of techniques is feasible.The auther suggests that the reliability of evaluation on two phases separation and structure analysis in semicrystalline polymer,besides the three criteria to estimate the parameters of the crystalline phase,also depends on other two new physical criteria.Effect of various fitting plans on the results of structure refinement and phase separation were discussed.It is shown that in order to get reliable results it is necessary to have scattering pattern of pure amorphous sample as initial values of background intensity in fitting process. 　　This work discusses how to deal with the difficulties and its possible solutions in applying Rietveld method to polymer structure analysis.
- Poly(ethylene terephthalate);Crystalline phase;Noncrystalline phase;Twophase separation;Rietveld method;Fourier filtering technique;Radial distribution function (RDF)
1. [1]
  Gaoyan Chen , Chaoyue Wang , Juanjuan Gao , Junke Wang , Yingxiao Zong , Kin Shing Chan . Heart to Heart: Exploring Cardiac CT. University Chemistry, 2024, 39(9): 146-150. doi: 10.12461/PKU.DXHX202402011
2. [2]
  Xiaowu Zhang , Pai Liu , Qishen Huang , Shufeng Pang , Zhiming Gao , Yunhong Zhang . Acid-Base Dissociation Equilibrium in Multiphase System: Effect of Gas. University Chemistry, 2024, 39(4): 387-394. doi: 10.3866/PKU.DXHX202310021
3. [3]
  Yanhui Zhong , Ran Wang , Zian Lin . Analysis of Halogenated Quinone Compounds in Environmental Water by Dispersive Solid-Phase Extraction with Liquid Chromatography-Triple Quadrupole Mass Spectrometry. University Chemistry, 2024, 39(11): 296-303. doi: 10.12461/PKU.DXHX202402017
4. [4]
  Jiao CHEN , Yi LI , Yi XIE , Dandan DIAO , Qiang XIAO . Vapor-phase transport of MFI nanosheets for the fabrication of ultrathin b-axis oriented zeolite membranes. Chinese Journal of Inorganic Chemistry, 2024, 40(3): 507-514. doi: 10.11862/CJIC.20230403
5. [5]
  Zhiwen HU , Weixia DONG , Qifu BAO , Ping LI . Low-temperature synthesis of tetragonal BaTiO₃ for piezocatalysis. Chinese Journal of Inorganic Chemistry, 2024, 40(5): 857-866. doi: 10.11862/CJIC.20230462
6. [6]
  Haiyang Zhang , Yanzhao Dong , Haojie Li , Ruili Guo , Zhicheng Zhang , Jiangjiexing Wu . Exploring the Integration of Chemical Engineering Principle Experiment with Cutting-Edge Research Achievements. University Chemistry, 2024, 39(10): 308-313. doi: 10.12461/PKU.DXHX202405035
7. [7]
  Xin Han , Zhihao Cheng , Jinfeng Zhang , Jie Liu , Cheng Zhong , Wenbin Hu . Design of Amorphous High-Entropy FeCoCrMnBS (Oxy) Hydroxides for Boosting Oxygen Evolution Reaction. Acta Physico-Chimica Sinica, 2025, 41(4): 100033-. doi: 10.3866/PKU.WHXB202404023
8. [8]
  Zunxiang Zeng , Yuling Hu , Yufei Hu , Hua Xiao . Analysis of Plant Essential Oils by Supercritical CO₂Extraction with Gas Chromatography-Mass Spectrometry: An Instrumental Analysis Comprehensive Experiment Teaching Reform. University Chemistry, 2024, 39(3): 274-282. doi: 10.3866/PKU.DXHX202309069
9. [9]
  Mingyang Men , Jinghua Wu , Gaozhan Liu , Jing Zhang , Nini Zhang , Xiayin Yao . 液相法制备硫化物固体电解质及其在全固态锂电池中的应用. Acta Physico-Chimica Sinica, 2025, 41(1): 2309019-. doi: 10.3866/PKU.WHXB202309019
10. [10]
  Heng Chen , Longhui Nie , Kai Xu , Yiqiong Yang , Caihong Fang . 两步焙烧法制备大比表面积和结晶性增强超薄g-C₃N₄纳米片及其高效光催化产H₂O₂. Acta Physico-Chimica Sinica, 2024, 40(11): 2406019-. doi: 10.3866/PKU.WHXB202406019
11. [11]
  Zijuan LI , Xuan LÜ , Jiaojiao CHEN , Haiyang ZHAO , Shuo SUN , Zhiwu ZHANG , Jianlong ZHANG , Yanling MA , Jie LI , Zixian FENG , Jiahui LIU . Synthesis of visual fluorescence emission CdSe nanocrystals based on ligand regulation. Chinese Journal of Inorganic Chemistry, 2025, 41(2): 308-320. doi: 10.11862/CJIC.20240138
12. [12]
  Yang Chen , Peng Chen , Yuyang Song , Yuxue Jin , Song Wu . Application of Chemical Transformation Driven Impurity Separation in Experiments Teaching: A Novel Method for Purification of α-Fluorinated Mandelic Acid. University Chemistry, 2024, 39(6): 253-263. doi: 10.3866/PKU.DXHX202310077
13. [13]
  Tongtong Zhao , Yan Wang , Shiyue Qin , Liang Xu , Zhenhua Li . New Experiment Development: Upgrading and Regeneration of Discarded PET Plastic through Electrocatalysis. University Chemistry, 2024, 39(3): 308-315. doi: 10.3866/PKU.DXHX202309003
14. [14]
  Yan Xiao , Shuling Li , Yifan Li , Jianing Fan , Linlin Shi . Discovering the Beauty of Life: Adding Some “Ingredients” to Crystals. University Chemistry, 2024, 39(6): 366-372. doi: 10.3866/PKU.DXHX202312025
15. [15]
  Qiuyu Xiang , Chunhua Qu , Guang Xu , Yafei Yang , Yue Xia . A Journey beyond “Alum”. University Chemistry, 2024, 39(11): 189-195. doi: 10.12461/PKU.DXHX202404094
16. [16]
  Lijuan Liu , Xionglei Wang . Preparation of Hydrogels from Waste Thermosetting Unsaturated Polyester Resin by Controllable Catalytic Degradation: A Comprehensive Chemical Experiment. University Chemistry, 2024, 39(11): 313-318. doi: 10.12461/PKU.DXHX202403060
17. [17]
  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
18. [18]
  Wei Zhong , Dan Zheng , Yuanxin Ou , Aiyun Meng , Yaorong Su . K原子掺杂高度面间结晶的g-C₃N₄光催化剂及其高效H₂O₂光合成. Acta Physico-Chimica Sinica, 2024, 40(11): 2406005-. doi: 10.3866/PKU.WHXB202406005
19. [19]
  Jinfeng Chu , Lan Jin , Yu-Fei Song . Exploration and Practice of Flipped Classroom in Inorganic Chemistry Experiment: a Case Study on the Preparation of Inorganic Crystalline Compounds. University Chemistry, 2024, 39(2): 248-254. doi: 10.3866/PKU.DXHX202308016
20. [20]
  Na Li , Limin Shao . Deduction of the General Formula of the Inverse Function of the Titration Curve. University Chemistry, 2025, 40(3): 390-401. doi: 10.12461/PKU.DXHX202409134

Get Citation

PDF

XML

Metrics

PDF Downloads(2600)
Abstract views(3119)
HTML views(1)

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