Citation: Gang Wang, Ke Wang. Studies on the Induction of Poly(lactic acid) Stereocomplex by Thermal and Tensile Treating[J]. Acta Polymerica Sinica, ;2018, 0(9): 1221-1227. doi: 10.11777/j.issn1000-3304.2018.18011 shu

Studies on the Induction of Poly(lactic acid) Stereocomplex by Thermal and Tensile Treating

Gang Wang ,
Ke Wang ^,

College of polymer science and engineering, Sichuan University, Chengdu 610065

Corresponding author: Ke Wang, wkestar@scu.edu.cn
Received Date: 11 January 2018
Revised Date: 15 March 2018
Available Online: 6 September 2018

Adding stereocomplex (SC) crystals into matrix can effectively improve the hydrolysis resistance and heat-resistance of polylactic acid (PLA). However, the existence of pre-formed SC crystals will increase the processing difficulty because a higher processing temperature is needed. Thus the exploration of inducing SC crystals via external force fields is important. In this paper, ‘quenched’ and ‘annealed’ PLA enantiomer mixtures were studied. The enantiomer mixtures were prepared by solution coprecipitation. Preparation of the ‘quenched’ specimen is done in two steps: hot pressed at 250 °C for 5 min and then quenched in air (15 °C). The method of annealing is done as following: hot pressed at 250 °C for 5 min, annealed at 200 °C for 30 min, and finally quenched in air. The X-ray diffraction patterns indicated that a loose structure with low order degree, named as quasi-ordered phase (QOP), was formed in the two types of the samples. Based on this structure, SC crystals was formed during stretching near the glass transition temperature (T_g) of PLA.The results of infrared spectra indicated that adequate amount of poly(D-lactic acid) (PDLA) is the prerequisite for the induction of SC crystals. There was no SC crystal generated in the specimens with 5% of PDLA, regardless of the treatment used. However, SC crystal appearred in the specimens with 20% of PDLA. This is because that adequate amount of QOP regions can merge and rebuild into complete crystals. In the specimens of high PDLA content, the transition could happen either during annealing or stretching above T_g (e.g., 70 °C). Owing to the self-nucleation and heterogeneous nucleation of QOP, α'-form crystal would be formed concomitantly during annealling. Therefore the former approach cannot generate pure SC crystal. As to the latter approach, depending on the tensile temperature and rate, mesophase, SC crystal and α'-form can be selectively generated. When stretched below T_g (e.g., 50 °C), only mesophase can be obtained beacause of low chain activity. As stretched at 70 °C, the tensile model has a great effect on the induced results. Fast stretching will induce highly pure SC crystals. Otherwise, when given sufficent time for chain segmet adjustment, both SC and α'-form crystals would be induced.
- Tensile deformation,
- Stereocomplex,
- Infrared spectroscopy,
- Quasi-ordered phase
1. [1]
  Sajjad S, Michel AH, Li H B, ParkC B. Prog Polym Sci, 2012, 37: 1657 − 1677
2. [2]
  Tsuji H. Macromol Biosci, 2005, 5: 569 − 597
3. [3]
  Tábi T, Hajb S, Kovács J G. Eur Polym J, 2016, 82: 232 − 243
4. [4]
  Jariyasakoolroj P, Tashiro K, Wang H, Yamamoto H, Chinsirikul W, Kerddonfag N, Chirachanchai S. Polymer, 2015: 234 − 245
5. [5]
  Zhou C B, Guo H L, Li J Q, Huang S Y, Li H F, Meng Y F, Yu D H, Christiansen J D C. RSC Adv, 2016, 6: 113762
6. [6]
  Sawai D, Takahashi K, Sasashige A, Kanamoto T, Hyon S. Macromolecules, 2003, 36: 3601 − 3605
7. [7]
  Pan P J, Liang Z C, Zhu B, Dong T, Inoue Y. Macromolecules, 2008, 41: 4296 − 4304
8. [8]
  de S P, Kovacs A J. Biopolymers, 1968, 6: 299 − 306
9. [9]
  Sasaki S, Asakura T. Macromolecules, 2003, 36: 8385 − 8390
10. [10]
  Furuhashi Y, Kimura Y, Yamane H. J Polym Sci, Part B: Polym Phys, 2007, 45: 218 − 228
11. [11]
  Zhang J M, Duan Y X, Sato H, Tsuji H, Noda I, Yan S K, Ozaki Y. Macromolecules, 2005, 38: 8012 − 8021
12. [12]
  Wasanasuk K, Tashiro K. Polymer, 2011, 52: 6097 − 6109
13. [13]
  Kawai T, Rahman N, Matsuba G, Nishida K, Kanaya T, Nakano M, Okamoto H, Kawada J, Usuki A, Honma N, Nakajima K, Matsuda M. Macromolecules, 2007, 40: 9463 − 9469
14. [14]
  Takahashi K, Sawai D, Yokoyama T, Kanamoto T, Hyon S. Polymer, 2004, 45: 4969 − 4976
15. [15]
  Cartier L, Okihara T, Ikada Y, Tsujic H, Puiggali J, Lotz B. Polymer, 2000, 41: 8909 − 8919
16. [16]
  Wasanasuk K, Tashiro K. Macromolecules, 2011, 44: 9650 − 9660
17. [17]
  Stoclet G, Seguela R, Lefebvre J M, Rochas C. Macromolecules, 2010, 43: 7228 − 7237
18. [18]
  Okihara T, Tsuji M, Kawaguchi A, Katayama K, Tsuji H, Hyon S, Ikada Y. J Macromol Sci Phys, 1991, 30(1-2): 119 − 140
19. [19]
  Furuhashi Y, Kimura Y, Yoshie N, Yamane H. Polymer, 2006, 47: 5965 − 5972
20. [20]
  Stoclet G. Polymer, 2016, 99: 231 − 239
21. [21]
  Yang C F, Huang Y F, Ruan J, Su A C. Macromolecules, 2012, 45: 872 − 878
22. [22]
  Zhang J M, Sato H, Tsuji H, Noda I, Ozaki Y. Macromolecules, 2005, 38: 1822 − 1828
23. [23]
  Zhuo R R, Zhang Y Y, Li G L, Shao C G, Wang Y M, Liu C T, Li Q, Cao W, Shen C Y. Vib Spectrosc, 2016, 86: 262 − 269
24. [24]
  Lv R H, Na B, Tian N N, Zou S F, Li Z J, Jiang S C. Polymer, 2011, 52: 4979 − 4984
25. [25]
  Na B, Tian N N, Lv R H, Li Z J, Xu W F, Fu Q. Polymer, 2010, 51: 563 − 567
26. [26]
  Hu J, Zhang T P, Gu M G, Chen X, Zhang J M. Polymer, 2012, 53: 4922 − 4926
27. [27]
  Hu X D, Shao J, Zhou D D, Li G, Ding J X, Chen X S. J Appl Polym Sci, 2016: 44626
1. [1]
  Supin Zhao , Jing Xie . Understanding the Vibrational Stark Effect of Water Molecules Using Quantum Chemistry Calculations. University Chemistry, 2025, 40(3): 178-185. doi: 10.12461/PKU.DXHX202406024
2. [2]
  Liang MA , Honghua ZHANG , Weilu ZHENG , Aoqi YOU , Zhiyong OUYANG , Junjiang CAO . Construction of highly ordered ZIF-8/Au nanocomposite structure arrays and application of surface-enhanced Raman spectroscopy. Chinese Journal of Inorganic Chemistry, 2024, 40(9): 1743-1754. doi: 10.11862/CJIC.20240075
3. [3]
  Yang Wang , Yunpeng Fu , Xiaoji Liu , Guotao Zhang , Guobin Li , Wanqiang Liu , Jinglun Wang . Structural Analysis of Nitrile Solutions Based on Infrared Spectroscopy Probes. University Chemistry, 2025, 40(4): 367-374. doi: 10.12461/PKU.DXHX202406113
4. [4]
  .
  南开大学师唯/华北电力大学（保定）刘景维：二维配位聚合物中有序的亲锂冠醚位点用于无枝晶锂沉积
  . CCS Chemistry, 2025, 7(0): -.
5. [5]
  Jiajie Li , Xiaocong Ma , Jufang Zheng , Qiang Wan , Xiaoshun Zhou , Yahao Wang . Recent Advances in In-Situ Raman Spectroscopy for Investigating Electrocatalytic Organic Reaction Mechanisms. University Chemistry, 2025, 40(4): 261-276. doi: 10.12461/PKU.DXHX202406117
6. [6]
  Ke Li , Chuang Liu , Jingping Li , Guohong Wang , Kai Wang . 钛酸铋/氮化碳无机有机复合S型异质结纯水光催化产过氧化氢. Acta Physico-Chimica Sinica, 2024, 40(11): 2403009-. doi: 10.3866/PKU.WHXB202403009
7. [7]
  Xiao-Qi Xu , Yapei Wang . Practice of Cultivating Multi-Disciplinary Talents with Comprehensive Skills through Demand-Driven, Individualized Education, and Humanities and Science Integration. University Chemistry, 2024, 39(6): 90-97. doi: 10.3866/PKU.DXHX202311049
8. [8]
  Jiahui CHEN , Tingting ZHENG , Xiuyun ZHANG , Wei LÜ . Research progress of near-infrared absorption inorganic nanomaterials in photothermal and photodynamic therapy of tumors. Chinese Journal of Inorganic Chemistry, 2024, 40(12): 2396-2414. doi: 10.11862/CJIC.20240106
9. [9]
  Han ZHANG , Jianfeng SUN , Jinsheng LIANG . Hydrothermal synthesis and luminescent properties of broadband near-infrared Na₃CrF₆ phosphor. Chinese Journal of Inorganic Chemistry, 2025, 41(2): 349-356. doi: 10.11862/CJIC.20240098
10. [10]
  Zhilian Liu , Wengui Wang , Hongxiao Yang , Yu Cui , Shoufeng Wang . Ideological and Political Education Design for the Synthesis of Irinotecan Drug Intermediate 7-Ethyl Camptothecin. University Chemistry, 2024, 39(2): 89-93. doi: 10.3866/PKU.DXHX202306012
11. [11]
  Mingjie Lei , Wenting Hu , Kexin Lin , Xiujuan Sun , Haoshen Zhang , Ye Qian , Tongyue Kang , Xiulin Wu , Hailong Liao , Yuan Pan , Yuwei Zhang , Diye Wei , Ping Gao . Co/Mn/Mo掺杂加速NiSe₂重构以提高其电催化尿素氧化性能. Acta Physico-Chimica Sinica, 2025, 41(8): 100083-. doi: 10.1016/j.actphy.2025.100083
12. [12]
  Wenliang Wang , Weina Wang , Lixia Feng , Nan Wei , Sufan Wang , Tian Sheng , Tao Zhou . Proof and Interpretation of Severe Spectroscopic Selection Rules. University Chemistry, 2025, 40(3): 415-424. doi: 10.12461/PKU.DXHX202408063
13. [13]
  Qi Wang , Yicong Gao , Feng Lu , Quli Fan . Preparation and Performance Characterization of the Second Near-Infrared Phototheranostic Probe: A New Design and Teaching Practice of Polymer Chemistry Comprehensive Experiment. University Chemistry, 2024, 39(11): 342-349. doi: 10.12461/PKU.DXHX202404141
14. [14]
  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
15. [15]
  Zhuomin Zhang , Hanbing Huang , Liangqiu Lin , Jingsong Liu , Gongke Li . Course Construction of Instrumental Analysis Experiment: Surface-Enhanced Raman Spectroscopy for Rapid Detection of Edible Pigments. University Chemistry, 2024, 39(2): 133-139. doi: 10.3866/PKU.DXHX202308034
16. [16]
  Jingyi Chen , Fu Liu , Tiejun Zhu , Kui Cheng . Practice of Integrating Ideological and Political Education into Raman Spectroscopy Analysis Experiment Course. University Chemistry, 2024, 39(2): 140-146. doi: 10.3866/PKU.DXHX202310111
17. [17]
  Chun-Lin Sun , Yaole Jiang , Yu Chen , Rongjing Guo , Yongwen Shen , Xinping Hui , Baoxin Zhang , Xiaobo Pan . Construction, Performance Testing, and Practical Applications of a Home-Made Open Fluorescence Spectrometer. University Chemistry, 2024, 39(5): 287-295. doi: 10.3866/PKU.DXHX202311096
18. [18]
  Tianlong Zhang , Jiajun Zhou , Hongsheng Tang , Xiaohui Ning , Yan Li , Hua Li . Virtual Simulation Experiment for Laser-Induced Breakdown Spectroscopy (LIBS) Analysis. University Chemistry, 2024, 39(6): 295-302. doi: 10.3866/PKU.DXHX202312049
19. [19]
  Wei Peng , Baoying Wen , Huamin Li , Yiru Wang , Jianfeng Li . Exploration and Practice on Raman Scattering Spectroscopy Experimental Teaching. University Chemistry, 2024, 39(8): 230-240. doi: 10.3866/PKU.DXHX202312062
20. [20]
  Zhaoyue Lü , Zhehao Chen , Yi Ni , Duanbin Luo , Xianfeng Hong . Multi-Level Teaching Design and Practice Exploration of Raman Spectroscopy Experiment. University Chemistry, 2024, 39(11): 304-312. doi: 10.12461/PKU.DXHX202402047

Get Citation

PDF

XML

Metrics

PDF Downloads(0)
Abstract views(154)
HTML views(21)

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

Studies on the Induction of Poly(lactic acid) Stereocomplex by Thermal and Tensile Treating

南开大学师唯/华北电力大学（保定）刘景维：二维配位聚合物中有序的亲锂冠醚位点用于无枝晶锂沉积

Metrics

通讯作者: 陈斌, bchen63@163.com