Citation: Xu-juan Li, Gan-ji Zhong, Zhong-ming Li. NON-ISOTHERMAL CRYSTALLIZATION OF POLY(L-LACTIDE) (PLLA) UNDER QUIESCENT AND STEADY SHEAR CONDITIONS[J]. Chinese Journal of Polymer Science, ;2010, 28(3): 357-366. doi: 10.1007/s10118-010-9015-z shu

NON-ISOTHERMAL CRYSTALLIZATION OF POLY(L-LACTIDE) (PLLA) UNDER QUIESCENT AND STEADY SHEAR CONDITIONS

Received Date: 25 February 2009
Revised Date: 29 April 2009

The non-isothermal crystallization of poly(L-lactide) (PLLA) under quiescent and steady shear flow conditions was in situ investigated by using polarizing optical microscopy (POM) with a hot shear stage and wide-angle X-ray diffraction (WAXD). The shear rate and the cooling rate both play a significant role in the final crystalline morphology and crystallinity. Under quiescent conditions, the morphology assumes different sized spherulites, and its crystallinity dramatically reduces with increasing the cooling rate. On the other hand, the shear flow increases the onset crystallization temperature, and enhances the final crystallinity. When the shear rate is above 5 s-1, cylindrite-like crystals are observed, furthermore, their content depends on the cooling rate.
1. [1]
  Rong-Nan Yi , Wei-Min He . Electron donor-acceptor complex enabled arylation of dithiocarbamate anions with thianthrenium salts under aqueous micellar conditions. Chinese Chemical Letters, 2024, 35(11): 110194-. doi: 10.1016/j.cclet.2024.110194
2. [2]
  Jun Lu , Jinrui Yan , Yaohao Guo , Junjie Qiu , Shuangliang Zhao , Bo Bao . Controlling solid form and crystal habit of triphenylmethanol by antisolvent crystallization in a microfluidic device. Chinese Chemical Letters, 2024, 35(4): 108876-. doi: 10.1016/j.cclet.2023.108876
3. [3]
  Haojie Song , Laiyu Luo , Siyu Wang , Guo Zhang , Baojiang Jiang . Advances in poly(heptazine imide)/poly(triazine imide) photocatalyst. Chinese Chemical Letters, 2024, 35(10): 109347-. doi: 10.1016/j.cclet.2023.109347
4. [4]
  Yanqi Wu , Yuhong Guan , Peilin Huang , Hui Chen , Liping Bai , Zhihong Jiang . Preparation of norovirus GII loop mediated isothermal amplification freeze-drying microsphere reagents and its application in an on-site integrated rapid detection platform. Chinese Chemical Letters, 2024, 35(9): 109308-. doi: 10.1016/j.cclet.2023.109308
5. [5]
  Xinyu Liu , Jialin Yang , Zonglin He , Jiaoyan Ai , Lina Song , Baohua Liu . Linear polyurethanes with excellent comprehensive properties from poly(ethylene carbonate) diol. Chinese Chemical Letters, 2025, 36(1): 110236-. doi: 10.1016/j.cclet.2024.110236
6. [6]
  Chong Liu , Ling Li , Jiahui Gao , Yanwei Li , Nazhen Zhang , Jing Zang , Cong Liu , Zhaopei Guo , Yanhui Li , Huayu Tian . The study of antibacterial activity of cationic poly(β-amino ester) regulating by amphiphilic balance. Chinese Chemical Letters, 2025, 36(2): 110118-. doi: 10.1016/j.cclet.2024.110118
7. [7]
  An Lu , Yuhao Guo , Yi Yan , Lin Zhai , Xiangyu Wang , Weiran Cao , Zijie Li , Zhixia Zhao , Yujie Shi , Yuanjun Zhu , Xiaoyan Liu , Huining He , Zhiyu Wang , Jian-Cheng Wang . Nanomedicine integrating the lipidic derivative of 5-fluorouracil, miriplatin and PD-L1 siRNA for enhancing tumor therapy. Chinese Chemical Letters, 2024, 35(6): 108928-. doi: 10.1016/j.cclet.2023.108928
8. [8]
  Ling Yang , Min Ren , Jie Wang , Liming He , Shanshan Wu , Shuai Yang , Wei Zhao , Hao Cheng , Xiaoming Zhou , Maling Gou . A non-viral gene therapy for melanoma by staphylococcal enterotoxin A. Chinese Chemical Letters, 2024, 35(5): 108822-. doi: 10.1016/j.cclet.2023.108822
9. [9]
  Xiaofei NIU , Ke WANG , Fengyan SONG , Shuyan YU . Self-assembly of [Pd₆(L)₄]⁸⁺-type macrocyclic complexes for fluorescent sensing of HSO₃^-. Chinese Journal of Inorganic Chemistry, 2024, 40(7): 1233-1242. doi: 10.11862/CJIC.20240057
10. [10]
  Ting Pan , Dinghu Zhang , Guomei You , Xiaoxia Wu , Chenguang Zhang , Xinyu Miao , Wenzhi Ren , Yiwei He , Lulu He , Yuanchuan Gong , Jie Lin , Aiguo Wu , Guoliang Shao . PD-L1 targeted iron oxide SERS bioprobe for accurately detecting circulating tumor cells and delineating tumor boundary. Chinese Chemical Letters, 2025, 36(1): 109857-. doi: 10.1016/j.cclet.2024.109857
11. [11]
  Hao Zhang , Haonan Qu , Ehsan Bahojb Noruzi , Haibing Li , Feng Liang . A nanocomposite film with layer-by-layer self-assembled gold nanospheres driven by cucurbit[7]uril for the selective transport of L-tryptophan and lysozyme. Chinese Chemical Letters, 2025, 36(1): 109731-. doi: 10.1016/j.cclet.2024.109731
12. [12]
  Li'na ZHONG , Jingling CHEN , Qinghua ZHAO . Synthesis of multi-responsive carbon quantum dots from green carbon sources for detection of iron ions and L-ascorbic acid. Chinese Journal of Inorganic Chemistry, 2025, 41(4): 709-718. doi: 10.11862/CJIC.20240280
13. [13]
  Weijian Zhang , Xianyu Deng , Liying Wang , Jian Wang , Xiuting Guo , Lianggui Huang , Xinyi Wang , Jun Wu , Linjia Jiang . Poly(ferulic acid) nanocarrier enhances chemotherapy sensitivity of acute myeloid leukemia by selectively targeting inflammatory macrophages. Chinese Chemical Letters, 2024, 35(9): 109422-. doi: 10.1016/j.cclet.2023.109422
14. [14]
  Chen Lian , Si-Han Zhao , Hai-Lou Li , Xinhua Cao . A giant Ce-containing poly(tungstobismuthate): Synthesis, structure and catalytic performance for the decontamination of a sulfur mustard simulant. Chinese Chemical Letters, 2024, 35(10): 109343-. doi: 10.1016/j.cclet.2023.109343
15. [15]
  Mengyuan Li , Xitong Ren , Yanmei Gao , Mengyao Mu , Shiping Zhu , Shufang Tian , Minghua Lu . Constructing bifunctional magnetic porous poly(divinylbenzene) polymer for high-efficient removal and sensitive detection of bisphenols. Chinese Chemical Letters, 2024, 35(12): 109699-. doi: 10.1016/j.cclet.2024.109699
16. [16]
  Haibo Ye , Qianyu Li , Juan Li , Didi Li , Zhimin Ao . Review on the abiotic degradation of biodegradable plastic poly(butylene adipate-terephthalate): Mechanisms and main factors of the degradation. Chinese Chemical Letters, 2025, 36(1): 109861-. doi: 10.1016/j.cclet.2024.109861
17. [17]
  Yaxuan Jin , Chao Zhang , Guigang Zhang . Atomically dispersed low-valent Au on poly(heptazine imide) boosts photocatalytic hydroxyl radical production. Chinese Journal of Structural Chemistry, 2024, 43(12): 100414-100414. doi: 10.1016/j.cjsc.2024.100414
18. [18]
  Shuxin Liu , Jinjuan Ma , Aiguo Wang , Nan Zheng . Decomposable and sono-enzyme co-triggered poly(sonosensitizers) for precise and hypotoxic sonodynamic therapy. Chinese Chemical Letters, 2025, 36(4): 110032-. doi: 10.1016/j.cclet.2024.110032
19. [19]
  Feibin Wei , Yongfang Rao , Yu Huang , Wei Wang , Hui Mei . The new challenges for the development of NH₃-SCR catalysts under new situation of energy transition in power generation industry. Chinese Chemical Letters, 2024, 35(6): 108931-. doi: 10.1016/j.cclet.2023.108931
20. [20]
  Tingting Liu , Pengfei Sun , Wei Zhao , Yingshuang Li , Lujun Cheng , Jiahai Fan , Xiaohui Bi , Xiaoping Dong . Magnesium doping to improve the light to heat conversion of OMS-2 for formaldehyde oxidation under visible light irradiation. Chinese Chemical Letters, 2024, 35(4): 108813-. doi: 10.1016/j.cclet.2023.108813

Get Citation

PDF

XML

Metrics

PDF Downloads(0)
Abstract views(656)
HTML views(0)

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