Results 141 to 150 of about 5,343,652 (178)
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Liquid crystallization of poly(styrene‐co‐maleic anhydride) induced by intermolecular hydrogen bonds
Journal of Applied Polymer Science, 1999The liquid crystallization of general polymer (GP) with maleic anhydride in the main chain has been realized through molecular recognition and self-assembly based on intermolecular hydrogen bonds. Poly[styrene-co-(N-4-carboxylphenyl)maleimide] (SMIBA) was synthesized by imidization and dehydration of Poly(styrene-co-maleic anhydride) (SMA) with p ...
Hua Yan, Xia Zhu
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Journal of Rheology, 1998
The response of macromolecular binary mixtures to shear flow is rather complex. Experimental evidence suggests that both shear-induced mixing and shear-induced demixing, observed as suppression or enhancement of concentration fluctuations, respectively, can occur (Hobbie et al, 1994; Larson, 1992; Takebe et al, 1989), depending on the amount of ...
D. Chopra +2 more
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The response of macromolecular binary mixtures to shear flow is rather complex. Experimental evidence suggests that both shear-induced mixing and shear-induced demixing, observed as suppression or enhancement of concentration fluctuations, respectively, can occur (Hobbie et al, 1994; Larson, 1992; Takebe et al, 1989), depending on the amount of ...
D. Chopra +2 more
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Dielectric relaxation of monoesters based poly(styrene-co-maleic anhydride) copolymer
Journal of Polymer Research, 2007A series of alkyl-grafted copolymers based on styrene-maleic anhydride (SMA) copolymers were synthesized by esterification of SMA with several long chain normal aliphatic alcohols. The prepared copolymers were characterized by FT-IR and 1H NMR and DSC.
Gamal R. Saad +3 more
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Synthesis and characterization of CdS nanocrystals in poly(styrene-co-maleic anhydride) copolymer
Colloid and Polymer Science, 2003CdS nanocrystals were synthesized in N, N-dimethylformamide solution of poly(styrene-co-maleic anhydride) random copolymer through the reaction of thiourea with cadmium acetate. The resulting random copolymer/CdS nanocrystal composites obtained under different reaction times or cadmium acetate concentrations were very stable and gave a bright ...
Yanming Chen +4 more
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International Journal of Polymeric Materials, 2012
Mesoporous hypercrosslinked styrene and maleic anhydride microspheres were prepared by suspension polymerization using a free radical initiator. Degree of crosslinking was increased by increasing the divinylbenzene content. Scanning electron micrographs revealed the introduction of definite compactness in the microspheres with increase in ...
Renuka Gonte +3 more
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Mesoporous hypercrosslinked styrene and maleic anhydride microspheres were prepared by suspension polymerization using a free radical initiator. Degree of crosslinking was increased by increasing the divinylbenzene content. Scanning electron micrographs revealed the introduction of definite compactness in the microspheres with increase in ...
Renuka Gonte +3 more
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Colloid and Polymer Science, 1994
Semi-IPN's based on linear poly(2,6-dimethyl-1,4-phenylene ether) (PPE) and diamine crosslinked poly(styrene-co-maleic anhydride) (PScoMA) copolymers containing small amounts of maleic anhydride (PSA=4.7wt.-% MA, PSB=5.8 wt-% MA) are studied with respect to the influence of cross-linking on the phase behavior.
J. Rösch +2 more
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Semi-IPN's based on linear poly(2,6-dimethyl-1,4-phenylene ether) (PPE) and diamine crosslinked poly(styrene-co-maleic anhydride) (PScoMA) copolymers containing small amounts of maleic anhydride (PSA=4.7wt.-% MA, PSB=5.8 wt-% MA) are studied with respect to the influence of cross-linking on the phase behavior.
J. Rösch +2 more
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Study on polymer blends of poly(styrene-co-acrylonitrile) and poly(styrene-co-maleic anhydride)
Polymer, 1988Abstract Polymer blends of poly(styrene- co -acrylonitrile) and poly(styrene- co -maleic anhydride) have been investigated by differential scanning calorimetry and light scattering measurements. Depending on the copolymer compositions it is possible to obtain miscible and immiscible blends and blends with lower critical solution temperature behaviour.
J. Kressler +3 more
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Fluorescent polymer made from chemical modification of poly(styrene-co-maleic anhydride)
Reactive and Functional Polymers, 2002Abstract Poly(styrene-co-maleic anhydride) (SMA) was modified by commercially available fluorescent dye, 4-amino-N-(2,4-dimethylphenyl)-1,8-naphthalimide, to prepare fluorescent poly(styrene-co-maleimide) (SMI). FT-IR, UV–Vis and fluorescent spectra of this polymer were investigated.
Kangcheng Wang +4 more
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Polymer Bulletin, 1992
The kinetics of the reaction between a styrene-maleic anhydride copolymer (SMA) and amines was investigated in tetrahydrofuran solution between 0°C and 40°C. This reaction converts the maleic anhydride (MA) into the corresponding amide-acid, while the consecutive reaction of the generated acid with amine forming a diamide or transformation of the acid ...
G. H. Hu, J. T. Lindt
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The kinetics of the reaction between a styrene-maleic anhydride copolymer (SMA) and amines was investigated in tetrahydrofuran solution between 0°C and 40°C. This reaction converts the maleic anhydride (MA) into the corresponding amide-acid, while the consecutive reaction of the generated acid with amine forming a diamide or transformation of the acid ...
G. H. Hu, J. T. Lindt
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Photooxidation of poly(styrene-co-maleic anhydride) using a QUVB-313 light source
Polymer Degradation and Stability, 1991Samples of 1:1 and 2:1 poly(styrene-co-maleic anhydride) films were exposed to radiation from a QUVB-313 light source under atmospheric oxygen and their photooxidative reactions studied using FTIR, UV-VIS and 13C NMR spectroscopy. A major finding was that the bulk of the photodegradation resulted in loss of low molecular weight volatile fragments from ...
Kelvyn A. Holland +3 more
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