Citation: Yu-han Wei, Cai-yuan Pan, Bin-yao Li, Xin-hong Yu, Yan-chun Han. EFFECT OF MOLECULAR WEIGHT AND FILM THICKNESS ON THE CRYSTALLIZATION AND MICROPHASE SEPARATION IN POLYSTYRENE-BLOCK-POLY(L-LACTIC ACID) THIN FILMS AT THE EARLY STAGE[J]. Chinese Journal of Polymer Science, ;2011, 29(3): 325-335. doi: 10.1007/s10118-011-1040-z shu

EFFECT OF MOLECULAR WEIGHT AND FILM THICKNESS ON THE CRYSTALLIZATION AND MICROPHASE SEPARATION IN POLYSTYRENE-BLOCK-POLY(L-LACTIC ACID) THIN FILMS AT THE EARLY STAGE

Received Date: 13 April 2010
Revised Date: 12 June 2010

We investigated the effects of molecular weight and film thickness on the crystallization and microphase separation in semicrystalline block copolymer polystyrene-block-poly(L-lactic acid) (PS-b-PLLA) thin films, at the early stage of film evolution (when Tg T TODT) by in situ hot stage atomic force microscopy. For PS-b-PLLA 1 copolymer which had lower molecular weight and higher PLLA fraction, diffusion-controlled break-out crystallization started easily. For PS-b-PLLA 2 with higher molecular weight, crystallization in nanometer scales occurs in local area. After melting of the two copolymer films, islands were observed at the film surface: PS-b-PLLA 1 film was in a disordered phase mixed state while PS-b-PLLA 2 film formed phase-separated lamellar structure paralleling to the substrate. Crystallization-melting and van der Waals forces drove the island formation in PS-b-PLLA 1 film. Film thickness affected the crystallization rate. Crystals grew very slowly in much thinner film of PS-b-PLLA 1 and remained almost unchanged at long time annealing. The incompatibility between PS and PLLA blocks drove the film fluctuation which subsequently evolved into spinodal-like morphology.
- Crystallization,
- Microphase separation｜ Molecular weight｜ Film thickness｜ Early stage
1. [1]
  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
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]
  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
4. [4]
  Shulei Hu , Yu Zhang , Xiong Xie , Luhan Li , Kaixian Chen , Hong Liu , Jiang Wang . Rh(Ⅲ)-catalyzed late-stage C-H alkenylation and macrolactamization for the synthesis of cyclic peptides with unique Trp(C7)-alkene crosslinks. Chinese Chemical Letters, 2024, 35(8): 109408-. doi: 10.1016/j.cclet.2023.109408
5. [5]
  Kexin Yuan , Yulei Liu , Haoran Feng , Yi Liu , Jun Cheng , Beiyang Luo , Qinglian Wu , Xinyu Zhang , Ying Wang , Xian Bao , Wanqian Guo , Jun Ma . Unlocking the potential of thin-film composite reverse osmosis membrane performance: Insights from mass transfer modeling. Chinese Chemical Letters, 2024, 35(5): 109022-. doi: 10.1016/j.cclet.2023.109022
6. [6]
  Ting WANG , Peipei ZHANG , Shuqin LIU , Ruihong WANG , Jianjun ZHANG . A Bi-CP-based solid-state thin-film sensor: Preparation and luminescence sensing for bioamine vapors. Chinese Journal of Inorganic Chemistry, 2024, 40(8): 1615-1621. doi: 10.11862/CJIC.20240134
7. [7]
  Jieqiong Qin , Zhi Yang , Jiaxin Ma , Liangzhu Zhang , Feifei Xing , Hongtao Zhang , Shuxia Tian , Shuanghao Zheng , Zhong-Shuai Wu . Interfacial assembly of 2D polydopamine/graphene heterostructures with well-defined mesopore and tunable thickness for high-energy planar micro-supercapacitors. Chinese Chemical Letters, 2024, 35(7): 108845-. doi: 10.1016/j.cclet.2023.108845
8. [8]
  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
9. [9]
  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
10. [10]
  Lingling Su , Qunyan Wu , Congzhi Wang , Jianhui Lan , Weiqun Shi . Theoretical design of polyazole based ligands for the separation of Am(Ⅲ)/Eu(Ⅲ). Chinese Chemical Letters, 2024, 35(8): 109402-. doi: 10.1016/j.cclet.2023.109402
11. [11]
  Jingwen Zhao , Jianpu Tang , Zhen Cui , Limin Liu , Dayong Yang , Chi Yao . A DNA micro-complex containing polyaptamer for exosome separation and wound healing. Chinese Chemical Letters, 2024, 35(9): 109303-. doi: 10.1016/j.cclet.2023.109303
12. [12]
  Huangjie Lu , Yingzhe Du , Peng Lin , Jian Lin . Separation of americium from lanthanides based on oxidation state control. Chinese Journal of Structural Chemistry, 2024, 43(10): 100344-100344. doi: 10.1016/j.cjsc.2024.100344
13. [13]
  Wenhao Chen , Muxuan Wu , Han Chen , Lue Mo , Yirong Zhu . Cu₂Se@C thin film with three-dimensional braided structure as a cathode material for enhanced Cu²⁺ storage. Chinese Chemical Letters, 2024, 35(5): 108698-. doi: 10.1016/j.cclet.2023.108698
14. [14]
  Zihao Wang , Jing Xue , Zhicui Song , Jianxiong Xing , Aijun Zhou , Jianmin Ma , Jingze Li . Li-Zn alloy patch for defect-free polymer interface film enables excellent protection effect towards stable Li metal anode. Chinese Chemical Letters, 2024, 35(10): 109489-. doi: 10.1016/j.cclet.2024.109489
15. [15]
  Zhimin Sun , Xin-Hui Guo , Yue Zhao , Qing-Yu Meng , Li-Juan Xing , He-Lue Sun . Dynamically switchable porphyrin-based molecular tweezer for on−off fullerene recognition. Chinese Chemical Letters, 2024, 35(6): 109162-. doi: 10.1016/j.cclet.2023.109162
16. [16]
  Li Lin , Song-Lin Tian , Zhen-Yu Hu , Yu Zhang , Li-Min Chang , Jia-Jun Wang , Wan-Qiang Liu , Qing-Shuang Wang , Fang Wang . Molecular crowding electrolytes for stabilizing Zn metal anode in rechargeable aqueous batteries. Chinese Chemical Letters, 2024, 35(7): 109802-. doi: 10.1016/j.cclet.2024.109802
17. [17]
  Minghao Hu , Tianci Xie , Yuqiang Hu , Longjie Li , Ting Wang , Tongbo Wu . Allosteric DNAzyme-based encoder for molecular information transfer. Chinese Chemical Letters, 2024, 35(7): 109232-. doi: 10.1016/j.cclet.2023.109232
18. [18]
  Chuan-Zhi Ni , Ruo-Ming Li , Fang-Qi Zhang , Qu-Ao-Wei Li , Yuan-Yuan Zhu , Jie Zeng , Shuang-Xi Gu . A chiral fluorescent probe for molecular recognition of basic amino acids in solutions and cells. Chinese Chemical Letters, 2024, 35(10): 109862-. doi: 10.1016/j.cclet.2024.109862
19. [19]
  Qiang Zhang , Weiran Gong , Huinan Che , Bin Liu , Yanhui Ao . S doping induces to promoted spatial separation of charge carriers on carbon nitride for efficiently photocatalytic degradation of atrazine. Chinese Journal of Structural Chemistry, 2023, 42(12): 100205-100205. doi: 10.1016/j.cjsc.2023.100205
20. [20]
  Yan Zou , Yin-Shuang Hu , Deng-Hui Tian , Hong Wu , Xiaoshu Lv , Guangming Jiang , Yu-Xi Huang . Tuning the membrane rejection behavior by surface wettability engineering for an effective water-in-oil emulsion separation. Chinese Chemical Letters, 2024, 35(6): 109090-. doi: 10.1016/j.cclet.2023.109090

Get Citation

PDF

XML

Metrics

PDF Downloads(0)
Abstract views(581)
HTML views(16)

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