Orientation and relaxation behaviors of lamellar microdomains of poly(methyl methacrylate)-b-poly(n-butyl acrylate) thin films as revealed by grazing-incidence small-angle X-ray scattering

被引：11
作者：
Saito, Itsuki [1 ]
Shimada, Daiki [1 ]
Aikawa, Mayu [1 ]
Miyazaki, Tsukasa [2 ]
Shimokita, Keisuke [2 ]
Takagi, Hideaki [3 ]
Yamamoto, Katsuhiro [1 ]
机构：
[1] Nagoya Inst Technol, Dept Mat Sci & Engn, Grad Sch Engn, Gokiso Cho, Nagoya, Aichi 466, Japan
[2] Nitto Denko Corp, Funct Design Technol Ctr, Osaka, Japan
[3] High Energy Accelerator Res Org, Inst Mat Struct Sci, Photon Factory, Ibaraki, Japan
来源：
POLYMER JOURNAL | 2016年 / 48卷 / 04期
关键词：
BLOCK-COPOLYMER FILMS; CONTROLLED INTERFACIAL INTERACTIONS; SURFACE-INDUCED ORIENTATION; ATOMIC-FORCE MICROSCOPY; ION MASS-SPECTROMETRY; DIBLOCK COPOLYMER; PERPENDICULAR ORIENTATION; PHOTOELECTRON-SPECTROSCOPY; STRUCTURAL-ANALYSIS; POLYMER-FILMS;
D O I：
10.1038/pj.2016.2
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The orientation behavior and domain spacing relaxation of the phase-separated structure of poly(methyl methacrylate-b-n-butyl acrylate) (PMMA-PnBA) thin films were investigated by grazing-incidence small-angle X-ray scattering (GISAXS). Moreover, low-energy GISAXS (tender X-ray) was performed for the in-depth profiling of the microphase-separated structure. PMMA-PnBA forms a lamellar structure. Parallel orientation of the lamellae was induced by thermal annealing. XPS measurements indicated that surface segregation of the PnBA component occurred rapidly, within 1 min after annealing at 160 degrees C. GISAXS measurements revealed that the apparent degree of orientation and the domain spacing D-parallel to of the parallel-oriented lamellae increased with annealing time, and the final D-parallel to was close to the domain spacing of the bulk material. The domain spacing relaxation took longer than the orientation of the lamellae of the block copolymers. Furthermore, it was found that D-parallel to in the vicinity of the surface was greater than inside the film, which indicates that the domain spacing near the surface relaxed faster than inside due to the higher mobility of the polymer chain.
引用
收藏
页码：399 / 406
页数：8
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