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Large molecular nucleating agent for poly butylenes succinate and copolyester of poly butylenes succinate and application thereof

A technology of polybutylene succinate and polysuccinic acid, applied in the field of macromolecular nucleating agents, can solve problems such as difficult dispersion and incomplete compatibility, achieve non-corrosiveness, improve mechanical properties and crystallinity and the effect of increasing the crystallization rate

Active Publication Date: 2012-06-13
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These nucleating agents are not completely compatible with PBS, and it is difficult to disperse uniformly in the PBS matrix

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Formula: polyvinyl butyral, polymerization degree 500, acetalization degree 65-70%, dosage 0.1% (mass), balance PBS.

[0031] Processing conditions: The macromolecular nucleating agent polyvinyl butyral in the formula is mixed evenly with PBS resin; the material is mixed with a torque rheometer at a temperature of 150°C for 6 minutes, and then molded by a tablet machine. The specimens required for the experimental tests were prepared. The temperature of the upper and lower plates is 150°C, preheated for 6 minutes, and held at a pressure of 16 MPa for 6 minutes.

[0032] Test results: the peak crystallization temperature of pure PBS is 62.96°C, the maximum crystallization temperature of PBS with nucleating agent is 69.05°C, and the crystallization temperature is increased by 6.09°C. The tensile strength of pure PBS is 26.24MPa, and the tensile strength of PBS added with nucleating agent reaches 32.89MPa, which is 6.65MPa higher than that of pure PBS, an increase of 25.3...

Embodiment 2

[0034]Formula: polyvinyl butyral, polymerization degree 1800, acetalization degree 68%, dosage 0.3wt% (mass), balance PBS.

[0035] Processing conditions: The macromolecular nucleating agent polyvinyl butyral in the formula is mixed evenly with PBS resin; the evenly mixed material is mixed with a torque rheometer at a temperature of 150°C for 6 minutes, and then compressed by a tablet machine Shaped to make the sample required for the experimental test. The temperature of the upper and lower plates is 150°C, preheated for 6 minutes, and held at a pressure of 16 MPa for 6 minutes.

[0036] Test results: The peak crystallization temperature of PBS increased from 62.96°C to 73.24°C, and the crystallization temperature increased by 10.28°C. The tensile strength of pure PBS is 26.24MPa, and the maximum tensile strength of modified PBS is 34.88MPa, which is 8.64MPa higher than pure PBS, an increase of 32.9%. The impact strength is increased from 11.74MPa to 14.13MPa, an increase of...

Embodiment 3

[0038] Formula: polyvinyl butyral, polymerization degree 800, acetalization degree 65%, dosage 1wt% (mass), balance PBS.

[0039] Processing conditions: The macromolecular nucleating agent polyvinyl butyral and PBS resin in the formula are extruded and granulated by a twin-screw extruder, and the sample is obtained by injection. The mold temperature is 120°C and the holding time is 30 seconds.

[0040] Test results: The peak crystallization temperature of PBS increased from 62.96°C to 71.52°C, and the crystallization temperature increased by 8.56°C. The tensile strength of pure PBS is 26.24MPa, and the maximum tensile strength of modified PBS is 33.46MPa, which is 7.22MPa higher than that of pure PBS, an increase of 27.5%. The impact strength is increased from 11.74MPa to 12.93MPa, an increase of 10.14%.

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Abstract

The invention relates to a large molecular nucleating agent for poly butylenes succinate and a copolyester of the poly butylenes succinate and an application thereof. The large molecular nucleating agent is polyvinyl acetal, and the nucleating performance of the polyvinyl acetal is regulated and controlled by blending the polyvinyl acetal with the poly butylenes succinate and the copolyester of the poly butylenes succinate in an in-site polymerization way or in an adding way in a processing process. The large molecular nucleating agent is non-toxic, odorless, non-corrosive and dispersible. By taking the polyvinyl acetal as the large molecular nucleating agent, the peak crystallization temperatures of the poly butylenes succinate and the copolyester of the poly butylenes succinate can be raised remarkably, crystallization degree and crystallization speed are increased remarkably, a crystallization period is shortened remarkably, and the mechanical property of resin is enhanced remarkably.

Description

technical field [0001] The present invention relates to a kind of macromolecule nucleating agent and application method for polybutylene succinate and copolyester thereof, specifically, to a kind of polybutylene succinate and polyester material The polyvinyl acetal macromolecular nucleating agent of its copolyester and its application method. Background technique [0002] The level of crystallinity of polymer materials, the difference of crystal morphology and crystal structure will affect the performance of polymer materials, thus affecting its application. The properties of commonly used polyester materials are significantly affected by crystallization. Polybutylene succinate (PBS) and its copolyester, due to their biodegradability, have become a research hotspot in the ascendant in recent years. However, due to problems in the synthesis process, the molecular weight of the obtained polyester is generally low, and its processing temperature is generally low, and it is ea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/14C08L67/02
Inventor 杨彪
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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