Degradable ternary poly-beta-hydroxy butyrate and its prepn.

A hydroxybutyrate and blend technology, applied in the field of plastic processing and molding, can solve the problems of easy re-brittleness, high price, complicated process, etc., and achieve the effects of obvious sustainable development, wide application range and simple process
CN1375523AInactive Publication Date: 2002-10-23TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2002-10-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention is characterized by that 70-92% of poly(beta-hydroxybutyrate), 4-20% of polyethylene glycol oxide, 3.5-20% of cellulose ester and 0.5-2% of adjuvant are uniformly mixed, placed into mould with 60-90 deg.C, then placed in an oil press, and the mould is heated to 160-195 deg.C to make hot-press formation, its pressure is 7-12 MPa, and the time is 20-40 min., then and mould is cooled to below 60 deg.C and demoulded so as to obtain the invented poly(beta-hydroxybutyrate) three-component blend. The melting temp. of said three-component blend is reduced, its toughness is improved and its complete degradability is also retained.
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Description

technical field

[0001] The invention belongs to the field of plastic processing and molding. Background technique

[0002] With the widespread use of plastics, environmental pollution caused by plastic waste has become one of the major problems facing modern society. The research of degradable plastics, especially the research and development of biodegradable plastics has become one of the hotspots in the research of new materials in the world. Poly(β-hydroxybutyrate) (PHB) is a kind of thermoplastic polyester, which has good biocompatibility and biodegradability, and can be used in daily life, medical field and environmental science field, etc. The crystallinity of poly(β-hydroxybutyrate) can reach more than 80%, so that the material itself is brittle and has poor impact resistance; at the same time, poly(β-hydroxybutyrate) is easy to decompose at high temperature, and the processing temperature range is narrow. This shortcoming limits i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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