Poly -block- 2-hydroxypropyl

Yoda, R., Komatsuzaki, S., Nakanishi, E. et al. (1994) Preparation and properties of A-B-A type block copolymer membranes consisting of poly(N-hydroxypropyl-L-glutamine) as the A component and polyisoprene as the B component. Biomaterials, 15,944—949. 

Vapor phase polymerization from SI-NMP of various vinylic monomers resulted in polymer bmshes with greater thicknesses than those formed by the solution phase process [21]. To explain this result, the authors supposed a more efficient reaction on the surface as a result of prolongation of the mean path of vaporized monomers in a vacuum, higher thermal energy of the monomer, and the possibility of adjusting the reaction parameters independently. Thin films of PS grafted polymer, poly (acrylic acid) (PAA), poly(2-hydroxypropyl methacrylamide) (PHPMA), and poly(lV-isopropylacrylamide) (PNIPAM) were prepared with thicknesses of a few nanometers to submicrometers. This process was also used for the preparation of block copolymers (e.g., PS-b-PAA and PAA-b-PS-PHPMA). It is important to mention that solution phase polymerization of AA, HPMA, and NIPAM is impossible with TEMPO-based alkoxyamines. 

Reversible addition-fragmentation chain transfer polymerisation of the highly hydrated zwitterionic poly(2-(methacryloyloxy)ethylphosphoryl-choline (PMPC) block with 2-hydroxypropyl methacrylate (HPMA) in water at 70 °C produced a hydrophobic poly(2-hydroxypropyl methacrylate) (PHPMA) block (38), which drove in situ self-assembly to form well-defined diblock copolymer spheres, worms or vesicles. 

Polymeric steric stabilizer such as poly(vinylpyrrolidone) (PVPo),poly(acrylic acid), poly(hydroxypropyl)cellulose, etc., are used to prepare monodisperse polymer in dispersion polymerization of monomers such as alkyl acrylates and methacrylates, and styrene in polar media. AB and ABA block copolymers are a second type of steric stabilizer which can be used in dispersion polymerization. For example, the poly(styrene-h-ethylene oxide) was recently used by Winnik et al. [6] in the dispersion polymerization of styrene in methanol. 

CAS 11272-76-1 27306-78-1 68937-54-2 68938-54-5 Synonyms Dimethylsiloxane-ethylene oxide block copolymer 2-[Methoxy (polyethyleneoxy) propyl] heptamethyltrisiloxane Poly [dimethylsilox-ane-co-methyl (3-hydroxypropyl) siloxane-graft-poly (ethyleneglycol) methyl ether... 

Synonyms Dimethylsiloxane (propylene oxide-ethylene oxide) block copolymer Poly [dimethylsiloxane-co-methyl (3-hydroxypropyl) siloxane-graft-poly (ethylene/propylene glycol) Polydimethylsiloxane/EO-PO copolymer Siloxanes and silicones, dimethyl, 3-hydroxypropyl methyl, ethoxylated, propoxylated ClassiTication Silicone... 

A photopolymerized microfluidic device consisting of two inlets, active mixing chamber containing a magnetic stir bar, a single reaction chaimel (500 pm x 600 pm), and one outlet has been used for ATRP reaction of 2-hydroxypropyl methacrylate (HPMA) initiated by methyl 2-bromopropionate (Fig. 23) [205]. The molecular weight can be controlled by changing the residence time at the different flow rates (Table 5). The kinetics and polymer properties are similar to those for the batch reactions reported in the literature [206]. Furthermore, a block copolymer poly... 

Hydrogenated rosin Hydroxypropyl methacrylate Jsobomyl acrylate Pentaeni hrityl tetrabenzoate Poly-o-methylstyrene Triethy lenemelam i ne adhesive modifier, delayed tack Pentaerythrityl tetrabenzoate adhesive modifier, hot-melt Glyceryl tribenzoate Neopentyl glycol dibenzoate Pentaerythrityl tetrabenzoate adhesive modifier, hot-melt block copolymer... 

A thiol-ene click coupling reaction can also be apphed to combine hving AROP and reversible addition-fragmentation polymerization (RAFT) techniques to yield PEO-b-poly(N-isopropylacrylamide) and PEO-h-poly(N-(2-hydroxypropyl)methacry-lamide) block copolymers (Scheme 11.5) [30]. The couphng yield of 90% was... 

Da (PDI = 1.21). The reaction temperatiire was not clearly defined, however. Subsequently, the same group reported details of the successful formation of a poly(ethylene oxide) (PEO)-poly(hydroxypropyl methacrylate) block copolymer using a pre-modified macro initiator [20]. 

Different types of water-based emulsions are used in EPI adhesives. The most common are poly(vinyl acetate) (PVAc) emulsion, ethylene vinyl acetate (EVAc) emulsion, vinyl acetate-acrylate copolymerized (VAAC) emulsion, acrylic-styrene (AcSt) emulsion or styrene-butadiene rubber (SBR) latex or modified versions of these emulsion types [1, 8, 9], It has also been reported that tri- or ter-polymer emulsions like vinyl acetate-butyl acrylate-hydroxypropyl methacrylate or emulsions with different combinations of block copolymers can be used [4], Emulsion polymers containing cross-linking functional groups are especially well suited [4,6, 9]. The choice of emulsion(s) will, to a large extent, influence the adhesive properties such as setting time, bond quality, heat resistance, and moisture resistance. EPI adhesive systems are, however, very complex and the total composition (including the choice of cross-linker) and the interaction between the different components will determine the properties of the adhesive. Due to this it is difficult to describe in detail the effect of choosing one type of emulsion over the other. 

The above study was expanded to investigate block copolymerization via ATRP in a similar device containing three inlet channels [87]. Block copolymers of poly(ethylene oxide-block-2-hydroxypropyl methacrylate) (PEO-b-PHPMA) were successfully demonstrated with varying block lengths. This technique provides a rapid method for screening various block copolymer compositions. 

A similar strategy was utilized to synthesize block copolymers of poly[(ethylene oxide)-i)k)ck-(2-hydroxypropyl methacrylate)] (PEO-block-PHPMA) with a well-defined molecular weight PEO block and a range of second blocks [47]. The molecular weight of the polymer increased when the flow rates decreased (i.e., the residence time increased) and aH copolymers had a narrow distribution of molecular weights. 

Utama et al. [46] recently proposed an alternative strategy for the preparation of nanocapsules using RAET polymerization in an inverse miniemulsion system. In this approach, dispersed aqueous droplets (with RAET-based active stabilizers at their interface) simply acted as templates, and chain extension (with hydrophobic monomers and crosslinkers contained in the surrounding continuous phase) yielded the nanocapsules. More specifically, methyl methacrylate (MMA) [46] or styrene [47], crosslinker (EGDMA or DVB, respectively), and initiator (AIBN) were dissolved in a toluene continuous phase. Water droplets containing sodium chloride as lipophobe were formed in these toluene solutions and stabilized with RAET-synthesized poly[M-2-(hydroxypropyl methacrylamide)]-h/oc -poly(methyl methacrylate) (PHPMA-h-PMMA) or PHPMA-h-PS block copolymers, where the PHPMA segment is hydrophilic. The subsequent polymerization was confined to... 

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