Solvent effect on the film formation and the stability of the surface properties of poly(methyl methacrylate) end-capped with fluorinated units

Wang, Xiaofang; Ni, Huagang; Xue, Dongwu; Wang, Xinping; Feng, Renwei; Wang, Hongfei

doi:10.1016/j.jcis.2008.02.018

Cited by 50 publications

(65 citation statements)

References 49 publications

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“…3). In the small-angle region (10-408), the diffraction peak around 2y 5 138 was observed in the diffraction profile of the pure PMMA (Wang et al, 2008). Broad band centered around 178 was attributed to amorphous structures of MMA/DBP/ OA mixture (Fig.…”

Section: Resultsmentioning

confidence: 93%

Oleic acid‐added embedding medium for histological analysis of hard tissue

Lim

Lee

2009

Microscopy Res & Technique

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For the histological analysis of hard tissue such as bone, various acrylate-based materials have been used as an embedding medium. However, commercial embedding media are expensive, and cutting the embedded block takes a long time. In this study, mixtures of methyl methacrylate (MMA), di-butyl-phthalate (DBP), and oleic acid (OA) were tested for possible application as an embedding medium for large and small undecalcified bone specimens. Mechanical properties were tested in a compressive mode. We investigated the change of hydrophilicity in the sectioned surface by measuring the contact angle depending on the OA. Crystallinity was analyzed using a X-ray diffractometer (XRD). Surface analysis was performed using a confocal laser scanning microscope. To determine the staining efficiency of staining dyes, hamatoxylin-eosin (H&E) and Masson's trichrome (MT) staining methods were performed for the histological analysis of bone-implant complex. We confirmed that the investigated embedding media showed good properties such as optimal mechanical strength appropriate for cutting the embedded block and proper staining efficiency for histological analysis. Therefore, the MMA/DBP/OA mixtures can be used as an embedding media appropriate for various hard tissues and bone-implant complex.

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Section: Resultsmentioning

confidence: 93%

Oleic acid‐added embedding medium for histological analysis of hard tissue

Lim

Lee

2009

Microscopy Res & Technique

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“…Figure 1 shows that the contact angles of water and paraffin oil are dependent on the length of the FMA units in the copolymers. The fluorinated copolymer with only one FMA unit exhibited excellent water and oil repellence, with the contact angles of water and paraffin oil on the surface of the films being about 120°and 84°, respectively, which were the same as those of poly (2-perfluorooctylethyl methacrylate) homopolymer [5,8] . The contact angles maintained constant values until the number of FMA units increased to four.…”

Section: Surface Structure and Properties Of Pmma 144 -B-pfma Nmentioning

confidence: 91%

“…[8]. Briefly, the visible input beam at 0.532 μm was generated by frequency doubling a part of the fundamental output from an EKSPLA Nd:YAG laser.…”

Section: Measurementsmentioning

confidence: 99%

“…The bands at 2830 and 2910 cm −1 are assigned to the harmonic or combination vibrations of the bending of -OCH 3 groups, respectively, which are enhanced by Fermi resonance [20] . The peaks at 2875 and 2850 cm −1 were assigned to the symmetric stretching vibration of the methylene groups [CH 2 (s)] connected to the perfluoroalkyl group [C 8 F 17 ] and that of the backbone methylene, respectively [8] . The intensity of the peak at 2875 cm −1 became weaker with an increase in chain alignment and ordered packing of the longer -(CF 2 ) 2 CF 3 moieties exposed to the air.…”

Section: Figurementioning

confidence: 99%

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Composition and solution properties of fluorinated block copolymers and their surface structures in the solid state

Xue

Wang

et al. 2009

Sci. China Ser. B-Chem.

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A series of diblock copolymers composed of methyl methacrylate and 2-perfluorooctylethyl methacrylate (PMMA 144 -b-PFMA n ) with various PFMA block lengths were prepared by atom transfer radical polymerization (ATRP). The surface structures and properties of these polymers in the solid state and in solution were investigated using contact angle measurement, X-ray photoelectron spectroscopy (XPS), sum frequency generation (SFG) vibrational spectroscopy, surface tension and dynamic laser light scattering (DLS). It was found that with increasing PFMA block length, water and oil repellency decreased, the ratio of F/C increased with increasing film depth, and the degree of ordered packing of the perfluoroalkyl side chains at the surface decreased. When the number of PFMA block units reached 10, PMMA segments were detected at the copolymer surface, which was attributed to the PFMA block length affecting molecular aggregation structure of the copolymer in the solution and the interfacial structure at the air/liquid interface, which in turn affects surface structure formation during solution solidification. The results suggest that copolymer solution properties play an important role in structure formation on the solid surface. fluorinated block copolymer, surface structure, solution properties, air-liquid interface

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“…The perfluorinated moieties were found to easily segregate to the surface to form an ordered and close-packed structure during film formation. Furthermore, it was found that the solvents used for film preparation greatly affected the surface structure and stability of end-capped poly(methyl methacrylate) films, due to their surface micro-structures, which were closely related to the associative behavior of the endcapped PMMA in solution [15] .…”

Section: Introductionmentioning

confidence: 99%

Effect of block length on the self-assembly of end-capping perfluoroalkyl moieties on the polymer surface

Yang

Zhao

Zhou

et al. 2009

Sci. China Ser. B-Chem.

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Most research on copolymers with fluorinated monomers has focused on the relationship between fluorinated monomer content and the corresponding surface structure. However, the influence of the non-fluorinated block on the surface structure of the copolymer film is unknown. Various molecular weight poly(butyl methacrylates) (PBMA) end-capped with 2-perfluorooctylethyl methacrylate (FMA) units (PBMA-ec-FMA) have been synthesized by atom transfer radical polymerization (ATRP). The effect of the PBMA block length on the surface structure and properties of the polymers both in the solid state and in solution was investigated using various techniques. X-ray photoelectron spectroscopy (XPS), sum frequency generation (SFG) vibrational spectroscopy and X-ray diffraction (XRD) analyses indicated that longer PBMA blocks enhanced both the enrichment of the fluorinated moieties and the order of the packing orientation of the perfluoroalkyl side chains on the surface. This enhancement was attributed mainly to the molecular aggregate structure of the end-capped polymers with long PBMA blocks in the solution and to the interfacial structure at the air/liquid interface, which favors the -(CF 2 ) 7 CF 3 moieties self-assembling on the polymer surface during film formation. This observation suggests that the polyacrylate block structure in fluorinated diblock copolymers, in addition to the fluorinated monomer content, plays an important role in structure formation on the solid surface.self-assembly, fluorinated end-capped polymer, surface structure, PBMA block length

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Solvent effect on the film formation and the stability of the surface properties of poly(methyl methacrylate) end-capped with fluorinated units

Cited by 50 publications

References 49 publications

Oleic acid‐added embedding medium for histological analysis of hard tissue

Oleic acid‐added embedding medium for histological analysis of hard tissue

Composition and solution properties of fluorinated block copolymers and their surface structures in the solid state

Effect of block length on the self-assembly of end-capping perfluoroalkyl moieties on the polymer surface

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