Calorimetric study of block-copolymers of poly(n-butyl acrylate) and gradient poly(n-butyl acrylate-co-methyl methacrylate)
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Calorimetric study of block-copolymers of poly(n-butyl acrylate) and gradient poly(n-butyl acrylate-co-methyl methacrylate)
The nanophase separation in diblock and triblock copolymers consisting of immiscible poly(n butyl acrylate) (block A) and gradient copolymers of methyl methacrylate (MMA) and n butyl acrylate (n BA) (block M/A) were investigated by means of their heat capacity, Cp, as a function of the composition of the blocks M/A and temperature. In all copolymers studied, both blocks are represented by their...
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1.1.3 Chemical and physical properties of the pure substance From American Conference of Governmental Industrial Hygienists (1991) unless otherwise noted. (a) Description: Colourless, flammable liquid (b) Boiling-point: 145°C (Lide, 1997) (c) Melting-point: –64.6°C (Lide, 1997) (d) Solubility: Very slightly soluble in water (0.14% at 20°C); soluble in ethanol, diethyl ether and acetone (e) Vapo...
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Although the effects of u.v. radiation on poly(methyl methacrylate) and poly(methyl acrylate) are superficially different, nevertheless there are obvious fundamental similarities and this copolymer system was chosen for study in order to observe the influence of one type of chain unit on the degradation reactions of the other. Rates of chain scission and crosslinking were measured at room tempe...
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Cloisite Na+was used as a solid surfactant (stabilizer) in Pickering emulsion polymerization of styrene-co-butyl acrylate in presence of oil soluble initiator, azobisisobutyronitrile (AIBN) and water soluble initiator, potassium persulfate (KPS). Fourier transform infrared (FTIR) spectrum approved the corporation of Cloisite Na+ layers within the polymer matrix. Effect of clay content was a...
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When linear polytrithiocarbonates as Reversible Addition-Fragmentation chain Transfer (RAFT) agents are employed in a radical polymerization, the resulting macromolecules consist of several homogeneous polymer blocks, interconnected by the functional groups of the respective RAFT agent. Via a second polymerization with another monomer, multiblock copolymers—polymers with alternating segments of...
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ژورنال
عنوان ژورنال: Polymer
سال: 2002
ISSN: 0032-3861
DOI: 10.1016/s0032-3861(02)00358-0