| Phase separation mechanism of polybutadiene/polyisoprene blends under oscillatory shear flow | |
| Zhang, Ruoyu1,2; Cheng, He1; Zhang, Chenggui3; Sun, Tongchen1,2; Dong, Xia1; Han, Charles C.1 | |
| 刊名 | Macromolecules
 |
| 2008-09-23 | |
| 卷号 | 41期号:18页码:6818-6829 |
| ISSN号 | 0024-9297 |
| DOI | 10.1021/ma800646s |
| 通讯作者 | Dong, xia(xiadong@iccas.ac.cn) |
| 英文摘要 | Viscoelastic polymer blends of polybutadiene (pb)low vinyl content polyisoprene (lpi), with a lower critical solution temperature (lcst), show interesting theological behaviors in temperature ramp measurements. in this report, a systematic study has been carried out, and the underlying physics has been investigated for the storage modulus g' at various temperatures and shear frequencies as the system passes through the binodal and the spinodal phase boundary lines. we considered the nucleation mechanism, spinodal fluctuations, shear induced mixing, and theological models in the interpretation of these interesting phenomena. shear induced mixing is varied in our system, and the frequency dependence is obvious. competition between the kinetics of the nucleation process and the droplet growth process has a prominent effect on the storage modulus for samples of noncritical compositions, while for samples with near-critical compositions the morphological evolution is responsible for the viscoelastic changes. time-dependent experiments provide important information about morphological evolution at different temperatures. the region where fluctuations play a dominant effect on g' can be discerned from our treatment of putting g' and {g'(omega)/[g ''(2)(omega)t](2/3) in the same reference frame. on the basis of the results from both heating and cooling processes, it seems that there also exist competition between fluctuations and interfacial gradient on the determination of the value of g'. |
| WOS关键词 | LINEAR VISCOELASTIC BEHAVIOR ; STAGE SPINODAL DECOMPOSITION ; BINARY POLYMER MIXTURE ; ANGLE NEUTRON-SCATTERING ; CONCENTRATION FLUCTUATION ; METHYL-ETHER) BLEND ; INTERFACIAL-TENSION ; LIGHT-SCATTERING ; CRITICAL FLUIDS ; RHEOLOGY |
| WOS研究方向 | Polymer Science |
| WOS类目 | Polymer Science |
| 语种 | 英语 |
| 出版者 | AMER CHEMICAL SOC |
| WOS记录号 | WOS:000259280000036 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2387635 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Dong, Xia |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Joint Lab Polymer Sci & Mat,Beijing Natl Lab Mol, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China 3.Zhengzhou Univ Light Ind, Sch Mat & Chem Engn, Zhengzhou 450002, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Ruoyu,Cheng, He,Zhang, Chenggui,et al. Phase separation mechanism of polybutadiene/polyisoprene blends under oscillatory shear flow[J]. Macromolecules,2008,41(18):6818-6829. |
| APA | Zhang, Ruoyu,Cheng, He,Zhang, Chenggui,Sun, Tongchen,Dong, Xia,&Han, Charles C..(2008).Phase separation mechanism of polybutadiene/polyisoprene blends under oscillatory shear flow.Macromolecules,41(18),6818-6829. |
| MLA | Zhang, Ruoyu,et al."Phase separation mechanism of polybutadiene/polyisoprene blends under oscillatory shear flow".Macromolecules 41.18(2008):6818-6829. |
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