Starch / C4~C8 ring graft copolymer and prep. and use thereof

A graft copolymer and cyclic technology, applied in the field of polymer material modification, can solve the problems of complex, cumbersome, and environmental pollution, and achieve the effects of improving hydrophobicity, improving compatibility, and reducing costs.

CN1194023CInactive Publication Date: 2005-03-23SICHUAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2005-03-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention is starch / C4-C8 cyclic monomer grafted copolymer and its preparation process. Starch of corn, beans, potato and grains in grain size of 1-20 microns or modified starch in 1-60 portions and one or several C4-C8 cyclic monomer p-dioxy cyclohexanone, 1, 5-dioxy suberyl-2-one, gamma-butyrolactone, beta-butyrolactone, delta-valerolactone, epsilon-caprolactone, diglycolide and lactide in 40-99 portions react in a reaction bottle under the protection of inert gas and in the presence of catalyst in 0.01-5 portions at 60-150 deg.c for 10-48 hr to produce grafted copolymer. The unreacted monomer and homopolymer are extracted separately with solvent, the product is vacuum dried to constant weight, and the monomer converting rate, grafting rate and grafting efficiency are measured.
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Description

1. Technical field

[0001] The present invention relates to a kind of starch or modified starch and C 4 ~C 8 The invention discloses a ring-opening graft copolymer, a preparation method and application thereof, and belongs to the field of modification of polymer materials. 2. Background technology

[0002] Due to the increasingly serious environmental pollution caused by discarded plastic products, more and more researchers have focused their attention on the research of fully biodegradable polymers. The research on aliphatic polymers represented by polylactic acid, polycaprolactone, and polydioxanone is the most popular. The main chain of this type of polymer is connected by easily hydrolyzed ester bonds. In nature, it can decompose and metabolize with phenols in various microorganisms or animals and plants, and finally form carbon dioxide and water. Due to the high price, such polymers are mainly used as medical materials at present.

[0003] Starch is a natural polymer...

Examples

Embodiment

[0030] Embodiment: Starch / C 4 ~C 8 The preparation of ring graft copolymers as figure 1 shown.

[0031] make up

[0032] *Extract the unreacted monomer and homopolymer of the prepared graft copolymer with toluene and 1,2-dichloroethane respectively, dry it to constant weight under vacuum, and measure the grafting rate and grafting efficiency.