Method for the preparing surfaces
A surface contact, molecular technology, applied to special surfaces, devices for coating liquids on surfaces, pretreatment surfaces, etc., can solve problems such as complicated application procedures
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Embodiment 1
[0060] Example 1: commercially available alkoxyamine (Initiator 1) Preparation of hydroxy-functionalized alkoxyamine (Initiator 2):
[0061] Charge a 1 L round bottom flask purged with nitrogen with:
[0062] -226.17g (Initiator 1) (1 equivalent)
[0063] -68.9g 2-hydroxyethyl acrylate (1 equivalent)
[0064] - 548g isopropanol.
[0065] The reaction mixture was heated at reflux (80° C.) for 4 hours, then the isopropanol was evaporated under vacuum. This gave 297 g of the hydroxy-functional alkoxyamine (initiator 2) in the form of a highly viscous yellow oil.
Embodiment 2
[0067] Experimental scheme for the preparation of copolymers from initiators 1, 2, 3 or 4.
[0068] - Initiator 1 is a commercially available alkoxyamine
[0069] - Initiator 2 is an alkoxyamine prepared according to Example 1.
[0070] - Initiator 3 consists of a pair of reagents: azoisobutyronitrile (AIBN) (1 molar equivalent) and N-tert-butyl 1-diethylphosphono-2,2-dimethylpropyl nitroxide ( 2 molar equivalents).
[0071] - Initiator 4 is azoisobutyronitrile (AIBN).
[0072] Preparation of polystyrene / polymethyl methacrylate, polystyrene / polymethyl methacrylate / polymethyl 2-Hydroxyethyl acrylate or polystyrene / polymethyl methacrylate / polyglycidyl methacrylate Copolymer
[0073] A stainless steel reactor equipped with a mechanical stirrer and jacket was charged with toluene and monomers such as styrene (S), methyl methacrylate (MMA), 2-hydroxyethyl methacrylate (HEMA), methyl Glycidyl acrylate (GMA) and initiator. The mass ratios between different styrene (S), m...
Embodiment 3
[0081] In addition to the copolymer described in Example 2, the block copolymer PS-block-PMMA (PS46.1 kg.mol -1 、PMMA21kg.mol -1 , PDI=1.09) were used without subsequent purification.
[0082] In SiO 2 Upper graft:
[0083] Silicon plates (crystalline orientation {100}) were manually cut into 3 x 4 cm pieces and processed by piranha (H 2 SO 4 / H 2 o 2 2:1 (v:v)) for 15 minutes, rinsed with deionized water and dried in a nitrogen stream just before functionalization. The remaining steps were as described in Mansky & al. (Science, 1997, 1458) with a single change (baking was performed in ambient atmosphere instead of under vacuum). The random copolymer was dissolved in toluene to form a 1.5% by mass solution. A solution of PS-r-PMMA was manually dispensed onto a freshly cleaned wafer and then spread by spin coating at 700 rpm to form a film with a thickness of approximately 90 nm. The substrate is then simply placed on a hot plate previously brought to the desired tempe...
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