Citation: Jiang-wei Zhao, Han Zhu, Yi-xian Wu, Wei-wei Zhou, Guan-ying Wu, Ri-wei Xu. EFFECTS OF CHAIN MICROSTRUCTURE OF BUTADIENE-ISOPRENE COPOLYMERS ON THEIR GLASS TRANSITION AND CRYSTALLIZATION[J]. Chinese Journal of Polymer Science, ;2010, 28(4): 475-482. doi: 10.1007/s10118-010-9053-6 shu

EFFECTS OF CHAIN MICROSTRUCTURE OF BUTADIENE-ISOPRENE COPOLYMERS ON THEIR GLASS TRANSITION AND CRYSTALLIZATION

Received Date: 13 April 2009
Revised Date: 21 May 2009

A series of butadiene-isoprene copolymers (BIR) with various compositions were synthesized with a neodymium-based catalyst system. The microstructure, composition and sequence of copolymers were characterized by FTIR and 13C-NMR spectroscopy. The crystallization behavior of the BIR copolymers was investigated by DSC analysis. The results demonstrate that the content of cis-1,4 configuration in both butadiene (Bd) and isoprene (Ip) units are around 98% when Bd content in feed (fBd) covering the range from 55.7 mol% to 96.0 mol%. The reactivity ratios of Bd and Ip were determined to be 1.40 and 0.48 respectively. The random copolymers of Bd and Ip show only one glass transition temperature (Tg) from -107.4°C to -80.5°C, which is dependent on the composition and fits nicely with Fox equation. The sequence distribution followed the first-order Markov statistical model. It is found that the copolymer chains with higher Bd content contain longer polybutadiene (PBd) segments, and the sequence length of PBd segments (NBd) exhibits great influence on the crystallization behavior of the copolymer. The copolymers with NBd ≥ 11.8 could crystallize at low temperatures -71°C to -43°C). The crystallization temperature and enthalpy values decreased gradually with decreasing NBd. The copolymers with NBd ≤ 7.9 are amorphous even at very low temperatures (0°C to-150°C) due to the short PBd segments.
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]
  Mingxin Song , Lijing Xie , Fangyuan Su , Zonglin Yi , Quangui Guo , Cheng-Meng Chen . New insights into the effect of hard carbons microstructure on the diffusion of sodium ions into closed pores. Chinese Chemical Letters, 2024, 35(6): 109266-. doi: 10.1016/j.cclet.2023.109266
3. [3]
  Yifei Zhang , Yuncong Xue , Laiwei Gao , Rui Liao , Feng Wang , Fei Wang . Merging non-covalent and covalent crosslinking: En route to single chain nanoparticles. Chinese Chemical Letters, 2024, 35(6): 109217-. doi: 10.1016/j.cclet.2023.109217
4. [4]
  Haoran Shi , Jiaxin Wang , Yuqin Zhu , Hongyang Li , Guodong Ju , Lanlan Zhang , Chao Wang . Highly selective α-C(sp³)-H arylation of alkenyl amides via nickel chain-walking catalysis. Chinese Chemical Letters, 2024, 35(7): 109333-. doi: 10.1016/j.cclet.2023.109333
5. [5]
  Kongchuan Wu , Dandan Lu , Jianbin Lin , Ting-Bin Wen , Wei Hao , Kai Tan , Hui-Jun Zhang . Elucidating ligand effects in rhodium(Ⅲ)-catalyzed arene–alkene coupling reactions. Chinese Chemical Letters, 2024, 35(5): 108906-. doi: 10.1016/j.cclet.2023.108906
6. [6]
  Yue WANG , Zhizhi GU , Jingyi DONG , Jie ZHU , Cunguang LIU , Guohan LI , Meichen LU , Jian HAN , Shengnan CAO , Wei WANG . Effects of kelp-derived carbon dots on embryonic development of zebrafish. Chinese Journal of Inorganic Chemistry, 2024, 40(6): 1209-1217. doi: 10.11862/CJIC.20230423
7. [7]
  Qiang Fu , Shouhong Sun , Kangzhi Lu , Ning Li , Zhanhua Dong . Boron-doped carbon dots: Doping strategies, performance effects, and applications. Chinese Chemical Letters, 2024, 35(7): 109136-. doi: 10.1016/j.cclet.2023.109136
8. [8]
  Luyao Lu , Chen Zhu , Fei Li , Pu Wang , Xi Kang , Yong Pei , Manzhou Zhu . Ligand effects on geometric structures and catalytic activities of atomically precise copper nanoclusters. Chinese Journal of Structural Chemistry, 2024, 43(10): 100411-100411. doi: 10.1016/j.cjsc.2024.100411
9. [9]
  Yatian Deng , Dao Wang , Jinglan Cheng , Yunkun Zhao , Zongbao Li , Chunyan Zang , Jian Li , Lichao Jia . A new popular transition metal-based catalyst: SmMn₂O₅ mullite-type oxide. Chinese Chemical Letters, 2024, 35(8): 109141-. doi: 10.1016/j.cclet.2023.109141
10. [10]
  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
11. [11]
  Tian Yang , Yi Liu , Lina Hua , Yaoyao Chen , Wuqian Guo , Haojie Xu , Xi Zeng , Changhao Gao , Wenjing Li , Junhua Luo , Zhihua Sun . Lead-free hybrid two-dimensional double perovskite with switchable dielectric phase transition. Chinese Chemical Letters, 2024, 35(6): 108707-. doi: 10.1016/j.cclet.2023.108707
12. [12]
  Boqiang Wang , Yongzhuo Xu , Jiajia Wang , Muyang Yang , Guo-Jun Deng , Wen Shao . Transition-metal free trifluoromethylimination of alkenes enabled by direct activation of N-unprotected ketimines. Chinese Chemical Letters, 2024, 35(9): 109502-. doi: 10.1016/j.cclet.2024.109502
13. [13]
  Zhaohong Chen , Mengzhen Li , Jinfei Lan , Shengqian Hu , Xiaogang Chen . Organic ferroelastic enantiomers with high T_c and large dielectric switching ratio triggered by order-disorder and displacive phase transition. Chinese Chemical Letters, 2024, 35(10): 109548-. doi: 10.1016/j.cclet.2024.109548
14. [14]
  Zhi-Yuan Yue , Hua-Kai Li , Na Wang , Shan-Shan Liu , Le-Ping Miao , Heng-Yun Ye , Chao Shi . Dehydration-triggered structural phase transition-associated ferroelectricity in a hybrid perovskite-type crystal. Chinese Chemical Letters, 2024, 35(10): 109355-. doi: 10.1016/j.cclet.2023.109355
15. [15]
  Yanrui Liu , Paramaguru Ganesan , Peng Gao . Harnessing d-f transition rare earth complexes for single layer white organic light emitting diodes. Chinese Journal of Structural Chemistry, 2024, 43(9): 100369-100369. doi: 10.1016/j.cjsc.2024.100369
16. [16]
  Zhuoer Cai , Yinan Zhang , Xiu-Ni Hua , Baiwang Sun . Phase transition arising from order-disorder motion in stable layered two-dimensional perovskite. Chinese Journal of Structural Chemistry, 2024, 43(11): 100426-100426. doi: 10.1016/j.cjsc.2024.100426
17. [17]
  Chang Liu , Zirui Song , Xinglan Deng , Shihong Xu , Renji Zheng , Wentao Deng , Hongshuai Hou , Guoqiang Zou , Xiaobo Ji . Interfacial/bulk synergetic effects accelerating charge transferring for advanced lithium-ion capacitors. Chinese Chemical Letters, 2024, 35(6): 109081-. doi: 10.1016/j.cclet.2023.109081
18. [18]
  Jiahui Li , Qiao Shi , Ying Xue , Mingde Zheng , Long Liu , Tuoyu Geng , Daoqing Gong , Minmeng Zhao . The effects of in ovo feeding of selenized glucose on liver selenium concentration and antioxidant capacity in neonatal broilers. Chinese Chemical Letters, 2024, 35(6): 109239-. doi: 10.1016/j.cclet.2023.109239
19. [19]
  Xin Li , Xuan Ding , Junkun Zhou , Hui Shi , Zhenxi Dai , Jiayi Liu , Yongcun Ma , Penghui Shao , Liming Yang , Xubiao Luo . Utilizing synergistic effects of bifunctional polymer hydrogel PAM-PAMPS for selective capture of Pb(Ⅱ) from wastewater. Chinese Chemical Letters, 2024, 35(7): 109158-. doi: 10.1016/j.cclet.2023.109158
20. [20]
  Fengrui Yang , Debing Wang , Xinying Zhang , Jie Zhang , Zhichao Wu , Qiaoying Wang . Synergistic effects of peroxydisulfate on UV/O₃ process for tetracycline degradation: Mechanism and pathways. Chinese Chemical Letters, 2024, 35(10): 109599-. doi: 10.1016/j.cclet.2024.109599

Get Citation

PDF

XML

Metrics

PDF Downloads(0)
Abstract views(623)
HTML views(46)

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