Unlock instant, AI-driven research and patent intelligence for your innovation.

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 high price, complicated process, easy to become brittle again, etc., and achieve the effect of wide application range and simple process

Inactive Publication Date: 2004-09-29
TIANJIN UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The defect of the copolymerization method is that the process is relatively complicated and the price is relatively expensive; and in the above-mentioned binary blends, the second component PVA (polyvinyl alcohol) has a high melting temperature and is not easy to process, PE (polyethylene), PS (polystyrene Ethylene), PMMA (polymethyl methacrylate), etc. cannot be degraded. PEO (polyethylene oxide) improves the toughness of PHB more obviously, but PEO is easy to hydrolyze, and CAB (cellulose ester) has a better toughening and strengthening effect, but the total Mixture tends to re-brittle within a short period of time

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Degradable ternary poly-beta-hydroxy butyrate and its prepn.
  • Degradable ternary poly-beta-hydroxy butyrate and its prepn.
  • Degradable ternary poly-beta-hydroxy butyrate and its prepn.

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] 1. PHB / PEO / CAB ternary blend composition ratio (weight percent)

[0018] Poly(beta-hydroxybutyrate) 91 g,

[0019] polyethylene oxide 4 g,

[0020] Cellulose acetate butyrate 4 g,

[0021] Auxiliary (nucleating agent, plasticizer, etc.) 1 g.

[0022] 2. PHB / PEO / CAB ternary blend composition ratio (weight percent)

[0023] Poly(beta-hydroxybutyrate) 79 g,

[0024] polyethylene oxide 10 g,

[0025] Cellulose acetate butyrate 10 g,

[0026] Auxiliary (nucleating agent, plasticizer, etc.) 1 g.

[0027] 3. PHB / PEO / CAB ternary blend composition ratio (weight percent)

[0028] Poly(beta-hydroxybutyrate) 70 g,

[0029] polyethylene oxide 10 g,

[0030] Cellulose acetate butyrate 19 g,

[0031] Auxiliary (nucleating agent, plasticizer, etc.) 1 gram.

[0032] 4. PHB / PEO / CAB ternary blend composition ratio (weight percent)

[0033] Poly(beta-hydroxybutyrate) 70 g,

[0034] Polyethylene oxide 19 g,

[0035] Cellulose acetate butyrate 10g,

[0036] Auxiliary (nucleati...

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
Login to View More

PUM

No PUM Login to View More

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.

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 its a...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04
Inventor 成国祥马世虎张立广王铁柱蔡志江
Owner TIANJIN UNIV