• Journal of Adhesion and Interface
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• v.3 no.3
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• pp.41-50
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• 2002

• Journal of Adhesion and Interface
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• v.10 no.3
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• pp.134-140
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• 2009

The acrylic copolymers with variation in side chain were synthesized based on molecular design. Wettability and adhesion properties on the wafer surface were investigated for these acrylic copolymer pressure sensitive adhesives. Three-dimensional networks of linear acrylic copolymers were produced with epoxy-type Tetra-DX cross-linking agent. The effect of cross-linking on adhesion characteristics was investigated. The side chain of acrylic copolymer played more important role in wettability than the interfacial interaction. As the degree of cross-linking increased, both probe tack and peel strength decreased. Also, heat resistance measured by SAFT increased with cross-linking; however, it showed the deterioration when excess cross-linking agent was added.

• The Journal of Advanced Prosthodontics
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• v.9 no.5
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• pp.335-340
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• 2017

PURPOSE. Bacterial adhesion on provisional crown materials retained for a long time can influence the duration for which permanent prosthetic restorations can be healthily worn in the oral cavity. The aim of this study was to compare seven different commonly used provisional crown materials with regard to Streptococcus mutans and Candida albicans surface adhesion. MATERIALS AND METHODS. For each group, twenty specimens of the provisional fixed prosthodontic materials TemDent ($Sch{\ddot{u}}tz$), Imident (Imicryl), Tab 2000 (Kerr), Structur Premium (Voco), Systemp (Ivoclar Vivadent), Acrytemp (Zhermack), and Takilon-BBF (Takilon) were prepared (diameter, 10.0 mm; height, 2.0 mm). Surface roughness was assessed by atomic force microscopy. Each group was then divided into 2 subgroups (n=10) according to the microbial suspensions used: S. mutans and C. albicans. The specimens were incubated at $37^{\circ}C$ with S. mutans or C. albicans for seven days. Bacterial adherence on surfaces was assessed using the 2,3-bis[2-methyloxy-4-nitro-5-sulfophenyl]-2H-tetrazolium-5-carboxanilide (XTT) assay. RESULTS. S. mutans showed maximum adhesion to Structur, followed by Systemp, Acrytemp, Takilon, Tab 2000, Imident, and TemDent (P<.05). The highest vital C. albicans adhesion was noted on Takilon, followed by Imident and Tab 2000; the lowest adhesion was noted on Systemp (P<.05). CONCLUSION. The materials showed significant differences in the degree of bacterial adhesion. C. albicans showed higher surface adhesion than S. mutans on provisional crown and fixed partial denture denture materials.

• Polymer(Korea)
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• v.38 no.3
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• pp.358-363
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• 2014

Adhesion forces between acrylate imprinting resin and a surface treated atomic force microscope (AFM) tip were investigated. Compared to the untreated silicon tip, 38% of the adhesion force is reduced for the hydrophobic tip treated with $CH_4$ plasma whereas 1.6 time increases is found for the hydrophilic tip with $O_2$ plasma treatment. Such a measurement of the adhesion force using AFM provides very quantitative results on adhesion comparing to the crosscut adhesion test which gives qualitative results. Since the adhesion area becomes larger as the imprinting pattern size gets smaller, the surface treatment issue becomes more important in the nano-imprinting process.

• Polymer Science and Technology
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• v.26 no.1
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• pp.40-46
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• 2015

• Korean Journal of Materials Research
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• v.13 no.5
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• pp.338-342
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• 2003

Adhesion between Cu and low-k films has been investigated. Low-k films deposited using a mixture of hexamethyldisilane(HMDS) and Para-xylene had a dielectric constant as low as 2.7, showing the thermally stable properties up to $400^{\circ}C$. In this study, Ti glue layer, boron dopant, and $N_2$plasma treatment were used to improve adhesion property of between Cu and low-k films. Ti glue layer slightly improved adhesion property. After $N_2$plasma treatment, the adhesion property was significantly improved due to the increased roughness and the formation of new binding states between Ti and plasma-treated PPpX : HMDS. However, $300^{\circ}C$ annealing of $N_2$plasma treated sample caused the diffusion of Cu into the PPpX : HMDS, degrading the low-k properties. In the case of Cu(B)/Ti/PPpX : HMDS, the adhesion was remarkably increased. This enhanced adhesion was attributed to formation of Ti-boride at the Cu-Ti interface. It is because the formed Ti-boride prevented the diffusion of Cu into the PPpX : HMDS and the Cu-Ti reaction at the Ti interface.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2005.11a
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• pp.366-367
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• 2005

The effect of benzotriazole (BTA) on the adhesion force of silica and pad particle on Cu/TEOS wafer surfaces was investigated with and without the addition of BTA. Cu-BTA had the isoelectric point (IEP) at around pH 4$\sim$8. Pad particles were more positive zeta potentials than silica. The adhesion force initially decreased of silica and pad particle on Cu surfaces when BTA was added. However, the more BTA was added, the more adhesion force gradually increased with the increase of BTA concentrations. Then the adhesion force of pad particle was higher than silica. And TEOS didn't resulted increasing adhesion force like Cu when BTA was added in DI water.

• Korean Journal of Materials Research
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• v.9 no.12
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• pp.1176-1180
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• 1999

The adhesion strength and high temperature/high humidity reliability of polyetherimide (PEI) adhesive on silicon wafer after being treated by each reactive ion etching (RIE) Aluminum (Al)-chelate adhesion promoter were investigated. 180$^{\circ}$ peel test and <85$^{\circ}C$ 85%> humidity test were performed for the initial adhesion strength and high temperature/high humidity reliability, respectively. For investigating surface effect scanning electron microscope (SEM), atomic force microscope (AFM), deionized (DI)-water contact angle studies were carried out. To investigate RIE effect, PEI was treated with $^O_2$ RIE, and then laminated. The initial peel strength increased slightly from 1.6 kg/cm for the first 2 minutes, and then decreased. High temp/high humid resistance decreased rapidly by RIE etching. RIE treatment on PEI affected on both of roughness and hydrophilicity increase. Aluminum-chelate adhesion promoter was coated by spinning on silicon wafer. The initial peel strength showed no effect of adhesion promoter treatment, but high temp/high humidity resistance increased remarkably. Al-chelate adhesion promoter did not affect the roughness but increased hydrophilicity.

• Journal of Adhesion and Interface
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• v.9 no.3
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• pp.27-33
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• 2008

A series of aluminum acetylacetonate (AlACA) belonging in inorganic chelate calculating with the ratio of -COOH mole in PSA (0, 0.25, 0.5, 0.75, 1) and a series of PSA with different acrylic acid contents (3 wt%, 7 wt%, 10 wt%) were blended and measured gel contents, probe tack, peel strength, SAFT. With the increasing of aluminum acetylacetonate contents, the network structure was formed and gel contents were increased. Probe tack fibrillation and peel strength were decreased following the addition of aluminum acetylacetonate. SAFT were significantly changed with the change of acrylic acid contents in PSA. From these results, aluminum acetylacetonate could be used in the range of which would not change the performance a lot, and cure the PSA.

• The Journal of Advanced Prosthodontics
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• v.6 no.1
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• pp.30-34
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• 2014

PURPOSE. This study evaluated the adhesion to acrylic resin specimens and biofilm formation capability of Candida albicans strains isolated from HIV positive subjects' oral rinse solutions. MATERIALS AND METHODS. The material tested was a heat-cured acrylic resin (Acron Duo). Using the adhesion and crystal violet assays, 14 oral Candida albicans isolated from HIV-positive subjects and 2 references Candida strains (C. albicans ATCC 90028 and C. albicans ATCC 90128) were compared for their biofilm production and adhesion properties to acrylic surfaces in vitro. RESULTS. There were no significant differences in adhesion (P=.52) and biofilm formation assays (P=.42) by statistical analysis with Mann-Whitney test. CONCLUSION. Denture stomatitis and increased prevalence of candidal carriage in HIV infected patients is unlikely to be related to the biofilm formation and adhesion abilities of C. albicans to acrylic resin materials.