Effect of poly(styrene‐co‐maleic anhydride) imidization on the miscibility and phase‐separation temperatures of poly(styrene‐co‐maleic anhydride)/poly(vinyl methyl ether) and poly(styrene‐co‐maleic anhydride)/ poly(methyl methacrylate) blends

Abstract

The objective of this work was to study the miscibility and phase-separation temperatures of poly(styrene-co-maleic anhydride) (SMA)/poly(vinyl methyl ether) (PVME) and SMA/poly(methyl methacrylate) (PMMA) blends with differential scanning calorimetry and small-angle light scattering techniques. We focused on the effect of SMA partial imidization with aniline on the miscibility and phaseseparation temperatures of these blends. The SMA imidization reaction led to a partially imidized styrene N-phenyl succinimide copolymer (SMI) with a degree of conversion of 49% and a decomposition temperature higher than that of SMA by about 208C. We observed that both SMI/PVME and SMI/PMMA blends had lower critical solution temperature behavior. The imidization of SMA increased the phase-separation temperature of the SMA/PVME blend and decreased that of the SMA/PMMA blend.

UV-cross-linked block copolymers for initiator-free, controlled in situ gelation of electrolytes in dye-sensitized solar cells

“…2c), 20 although a small peak at approximately 1670 cm À1 (carbonyl vibration of free carboxyl acid) indicated partial ring opening. 20,38 The presence of Jeffamine in PASMI-g-Jeffamine was also confirmed by the broad C-O and C-H vibration peaks of Jeffamine at approximately 1000-1200 cm À1 and 2500-3100 cm À1 (Fig. 2a and c, arrows).…”

Low-Cost and Formaldehyde-Free Wood Adhesive Based on Water-Soluble Olefin-Maleamic Acid Copolymers

“…27 Waste olefins can also smoothly copolymerize with MAH by 2SP polymerization technology, avoiding incineration and promoting economic benefits. 28 Furthermore, these copolymers have attracted intensive attention due to their excellent heat resistance as well as high reactivity of maleic anhydride group, 29,30 which provides the possibility for further modification including esterification, 31 hydrolysis, 32 amination 33 and imidization, 34 and so forth.…”

Solvent-free preparation of uniform styrene/maleimide copolymer microspheres from solid poly(styrene-alt-maleic anhydride) microspheres

“…Polymer microspheres are a class of micro or nano scale materials which have been widely used in various fields such as enzyme/drug/catalystsupports, [1][2][3][4] water treatment, 5 chromatography, 6 tissue engineering 7 and composite materials. 8 Among these polymer microspheres, the poly(styrene-altmaleic anhydride) (SMA) microsphere has attracted intensive attention due to its excellent heat resistance as well as the high reactivity of its maleic anhydride group, 9,10 which provides the possibility for further modification including esterification, 11 hydrolysis, 12 amination, 13 imidization, 14 etc. For the coating or filling application that requires long-term chemical stability and resistance against moisture, styrene maleimide copolymers (SMI) are superior to SMA owing to the inertness of their maleimide groups.…”