| Investigation on phase separation kinetics of polyolefin blends through combination of viscoelasticity and morphology | |
| Niu, Yanhua1; Yang, Liang1,2; Shimizu, Katsumi3; Pathak, Jai A.4; Wang, Howard5; Wang, Zhigang1 | |
| 刊名 | Journal of physical chemistry b
 |
| 2009-07-02 | |
| 卷号 | 113期号:26页码:8820-8827 |
| ISSN号 | 1520-6106 |
| DOI | 10.1021/jp901209b |
| 通讯作者 | Wang, zhigang(zgwang@iccas.ac.cn) |
| 英文摘要 | Phase separation kinetics of polyethylene copolymer blends polyethylene-co-hexene (peh)/polyethylene-co-butene (peb) at a phase separation temperature of 130 degrees c have been investigated through the combination of rheological measurements and optical microscope observation. when the blends are located in the unstable region, i.e., peh/peb 40/60 blend (h40), 50/50 blend (h50), and 60/40 blend (h60), due to the coeffect of the fast decay of concentration fluctuations and the reduced interfacial area, the stroage modulus, g', behaves dramatically, decreasing at the early or intermediate stages; while when the blends are located in the metastable region, i.e., peh/peb 70/30 blend (h70), g' decreases slightly and slowly during the whole time sweep process. during the cyclic frequency sweeps, g' evolutions of h50 and h70 show similar trends. obviously different from the strong phase segregation systems, the increase of g' with time in the metastable region has not been observed, possibly due to the entanglement effects and weak interaction between the components of polyethylene blends. the interfacial tension-driven or diffusion-limited morphological evolutions of h50 and h70 during phase separation give direct interpretations to the viscoelastic difference between the two blends, which is dominated by different phase separation kinetics. the relatively low interfacial tensions at the late stage of phase separation for h50 (0.5-0.38 mn/m varying with time) and h70 (1.2 mn/m) can be estimated by using the gramespacher-meissner model. |
| WOS关键词 | POLYMER-POLYMER INTERFACES ; SPINODAL DECOMPOSITION ; SCALING ANALYSIS ; DOMAIN GROWTH ; MELT BLENDS ; RHEOLOGY ; BEHAVIOR ; MIXTURES ; MODEL ; CRYSTALLIZATION |
| WOS研究方向 | Chemistry |
| WOS类目 | Chemistry, Physical |
| 语种 | 英语 |
| 出版者 | AMER CHEMICAL SOC |
| WOS记录号 | WOS:000267384400004 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2401071 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Wang, Zhigang |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Key Lab Engn Plast, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China 3.RIKEN, SPring Ctr 8, Adv Prot Crystallog Res Grp, Harima Inst, Saya, Hyogo 6795148, Japan 4.George Mason Univ, Dept Chem, Fairfax, VA 22030 USA 5.SUNY Binghamton, Dept Mech Engn, Binghamton, NY 13902 USA |
| 推荐引用方式 GB/T 7714 | Niu, Yanhua,Yang, Liang,Shimizu, Katsumi,et al. Investigation on phase separation kinetics of polyolefin blends through combination of viscoelasticity and morphology[J]. Journal of physical chemistry b,2009,113(26):8820-8827. |
| APA | Niu, Yanhua,Yang, Liang,Shimizu, Katsumi,Pathak, Jai A.,Wang, Howard,&Wang, Zhigang.(2009).Investigation on phase separation kinetics of polyolefin blends through combination of viscoelasticity and morphology.Journal of physical chemistry b,113(26),8820-8827. |
| MLA | Niu, Yanhua,et al."Investigation on phase separation kinetics of polyolefin blends through combination of viscoelasticity and morphology".Journal of physical chemistry b 113.26(2009):8820-8827. |
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