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Preparation method of modified starch and PBS blending material

A starch and blending technology, which is applied in the field of preparation of modified starch/PBS blend materials, can solve the problems of limited plasticizer modification effect, unsatisfactory properties of blend materials, and limited compatibility between starch and PBS. Achieve the effect of easy operation and good mechanical properties

Inactive Publication Date: 2019-02-15
太仓欧典新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the modification effect of the currently used plasticizer is limited, the plasticizer is easy to migrate from the starch matrix, the compatibility of starch and PBS in the corresponding system is limited, and the performance of the blended material is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for preparing a modified starch / PBS blend material, comprising the steps of: placing starch and PBS in a vacuum oven at 102°C for 6.5 hours to dry moisture; mixing 10 parts of starch, 30 parts of PBS, 6 parts of [ BMIM]Cl ionic liquid and 3 parts of magnesium chloride were melt-blended in a torque rheometer, the blending temperature was 105°C, the blending rotor speed was 65r / min, and the blending time was 20min; then the samples were prepared by micro-injection molding machine Form into a dumbbell shape with a width of 4mm, the injection pressure is 38MPa, the injection temperature is 115°C, the holding pressure is 38MPa, the mold temperature is 32°C, the distance between clamps is 42mm, the stretching rate is 45mm / min, and it is obtained after cooling; all raw materials are parts by weight.

Embodiment 2

[0020] A method for preparing a modified starch / PBS blend material, comprising the following steps: placing starch and PBS in a vacuum oven at 100°C for 6 hours to dry moisture; mixing 15 parts of starch, 25 parts of PBS, 5 parts of [BMIM ]Cl ionic liquid and 2 parts of magnesium chloride were melt-blended in a torque rheometer, the blending temperature was 110°C, the blending rotor speed was 65r / min, and the blending time was 15min; then the samples were prepared into 4mm wide dumbbell shape, the injection pressure is 37MPa, the injection temperature is 110°C, the holding pressure is 37MPa, the mold temperature is 30°C, the distance between the clamps is 41mm, the tensile rate is 44mm / min, and it is obtained after cooling; all raw materials are parts by weight.

Embodiment 3

[0022] A method for preparing a modified starch / PBS blend material, comprising the following steps: placing starch and PBS in a vacuum oven at 104°C for 7 hours to dry moisture; mixing 25 parts of starch, 35 parts of PBS, 7 parts of [BMIM ]Cl ionic liquid and 4 parts of magnesium chloride were melt-blended in a torque rheometer, the blending temperature was 120°C, the blending rotor speed was 65r / min, and the blending time was 25min; then the samples were prepared into 4mm wide dumbbell shape, the injection pressure is 39MPa, the injection temperature is 120°C, the holding pressure is 39MPa, the mold temperature is 34°C, the distance between the clamps is 43mm, the tensile rate is 46mm / min, and it is obtained after cooling; all raw materials are parts by weight.

[0023] The method is simple, fast and easy to operate, and the prepared modified starch / PBS blend material has good mechanical properties and can be prepared on a large scale.

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PUM

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Abstract

The invention discloses a preparation method of modified starch and PBS blending material. The preparation method comprises the following steps that starch and PBS are put into a vacuum drying oven with the temperature of 100-104 DEG C for drying for 6-7 hours so as to dry water; the starch, the PBS, [BMIM]Cl ionic liquid and magnesium chloride are put into a torque rheometer for melt blending, wherein the blending temperature is 110-120 DEG C, the rotating speed of a blending rotor is 65 r / min, and the blending time is 15-25 minutes; and a sample is prepared into a dumbbell type with the width of 4 mm by adopting a micro injection molding machine, wherein the injection pressure is 37-39 MPa, the injection temperature is 110-120 DEG C, the pressure maintaining pressure is 37-39 MPa, the temperature of a mold is 30-34 DEG C, the spacing of clamps is 41-43 mm, the stretching rate is 44-46 mm / min, and the bending material is obtained after cooling. The preparation method has the advantages of being simple and convenient, and easy to operate; and the prepared modified starch and the PBS blending material has good mechanical properties and can be prepared on a large scale.

Description

technical field [0001] The invention relates to a preparation method of a modified starch / PBS blend material. Background technique [0002] The development of biodegradable polymer materials is an effective way to solve the problem of plastic "white pollution". Among biodegradable aliphatic polyesters including polylactic acid (PLA), polycaprolactone (PCL) and poly(3-hydroxybutyrate) (PHB), polybutylene succinate (PBS ) has become one of the fastest growing varieties due to its excellent comprehensive performance and good industrialization prospects. Compared with other biodegradable polyesters, PBS has excellent performance in terms of biodegradability, processability, thermal properties and chemical stability, and can be prepared through non-petroleum routes, which is a new type of environmentally friendly material. PBS has excellent mechanical properties, heat resistance and processing properties, but there are problems such as high cost, high crystallinity and high bri...

Claims

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Application Information

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IPC IPC(8): B29C45/77B29C45/78B29B7/00C08L67/04C08L3/02B29K467/00
CPCB29C45/77B29B7/005B29C45/78B29C2945/76498B29C2945/76531B29K2403/00B29K2467/00C08L67/04C08L3/02
Inventor 不公告发明人
Owner 太仓欧典新材料有限公司
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