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Synthesis of Styrene-Co-Itaconic Anhydride Alternating Copolymer Microspheres by Self-Stable Precipitation Polymerization

Author: YangKun
Tutor: YangWanTai
School: Beijing University of Chemical Technology
Course: Materials Science and Engineering
Keywords: Self-stabilizing precipitation polymerization Styrene Itaconic anhydride Alternating copolymer Monodisperse Crosslinked Microspheres
CLC: O631.3
Type: Master's thesis
Year: 2011
Downloads: 24
Quote: 0
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Abstract


Itaconic anhydride by microbial fermentation extract , and after dehydration cyclization obtained a new non-toxic renewable chemical raw materials . Similar to maleic anhydride , itaconic anhydride in the molecule also contains the functionality of a functional group of the acid anhydride group and an unsaturated carbon-carbon double bond , is an important monomer in the polymer synthesis and the production process , widely used in synthetic resin , ion exchange resins, adhesives , and nontoxic packaging material production . This experiment by \itaconic anhydride - styrene copolymer microspheres morphology and particle size . The results show that the polymerization system without adding any stabilizer or surfactant , the stability of the polymerization process , surface cleanliness can be obtained directly , controllable uniform particle size in the range between 350-800nm ??of a monodisperse polymer microspheres; IR, NMR , and acid-base titration tests showed that the polymer is itaconic anhydride - styrene copolymer , and has a strictly alternating copolymer structure ; through differential thermal analysis, thermal gravimetric analysis , and maleic anhydride - styrene copolymer was compared , this polymer has a better heat resistance . Synthesized by crosslinking itaconic anhydride - styrene copolymer microspheres by adding a crosslinking agent in the system , a crosslinking agent can be a more effective control of the particle size of the copolymer microspheres having a higher gel content of the copolymer ; By choosing the synthesis of a- methyl styrene and itaconic anhydride itaconic anhydride - α - methyl- styrene copolymer microspheres microsphere particle size up to 900nm or above , by acid-base titration to prove that the polymer is itaconic anhydride - α-methyl styrene alternating copolymer.

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CLC: > Mathematical sciences and chemical > Chemistry > Polymer chemistry ( polymer ) > Polymer physics and physical chemistry of polymers > The chemical nature of polymers
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