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Thermoplastic polyvinyl alcohol material and preparation method thereof

A polyvinyl alcohol and thermoplastic technology, which is applied in the field of thermoplastic polyvinyl alcohol materials and its preparation, can solve the problems of complex precursor preparation process, unsatisfactory production efficiency, and low tensile strength of products, and achieve better gloss and improved Process fluidity, effect of process fluidity improvement

Active Publication Date: 2017-09-22
HUAIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of the precursor in the prior art scheme is complex, the preparation cycle is long, the production efficiency is not ideal, the product has low tensile strength, poor mechanical properties, poor processing fluidity, and easy yellowing

Method used

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  • Thermoplastic polyvinyl alcohol material and preparation method thereof
  • Thermoplastic polyvinyl alcohol material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Be 100 parts of polyvinyl alcohols with a degree of polymerization of 1700 and a degree of alcoholysis of 99%, 5 parts of polylactic acid (poly-L-lactic acid) with a weight average molecular weight of 120,000, pentaerythritol-mannitol composite plasticizer (pentaerythritol and nectar) The mass ratio of alcohol is 8:7) 20 parts, 1 part of stearic acid, 1 part of anti-oxidant 1010 and 2 parts of calcium stearate are mixed uniformly in high mixer, obtains precursor; Then precursor is extruded with twin-screw Extrude and granulate under the conditions of 170°C in the first zone, 180°C in the second zone, 200°C in the third zone, 200°C in the fourth zone, 200°C in the fifth zone, 200°C in the sixth zone, 200°C in the head, and 150rpm of the screw speed to obtain Thermoplastic polyvinyl alcohol material.

Embodiment 2

[0030] Be that 1000, degree of alcoholysis be 100 parts of polyvinyl alcohols of 99% by degree of polymerization, 8 parts of polylactic acid with weight-average molecular weight of 80,000, pentaerythritol-mannitol composite plasticizer (the mass ratio of pentaerythritol and mannitol is 7: 6) 25 parts, 2 parts of stearic acid, 1 part of anti-oxidant 1010 and 2 parts of zinc stearate were mixed uniformly in a high-speed mixer to obtain a precursor; , 175°C in the second zone, 185°C in the third zone, 190°C in the fourth zone, 195°C in the fifth zone, 195°C in the sixth zone, extruding and granulating under the conditions of 190°C and 100rpm screw speed to obtain a thermoplastic polyvinyl alcohol material.

Embodiment 3

[0032] Be that 1700, degree of alcoholysis be 100 parts of polyvinyl alcohols of 88% by degree of polymerization, weight-average molecular weight is 10 parts of polylactic acid of 150,000, pentaerythritol-mannitol composite plasticizer (the mass ratio of pentaerythritol and mannitol is 9: 7) 10 parts, 1 part of stearic acid, 1 part of anti-oxidant 1010, 1 part of calcium stearate and 1 part of zinc stearate are mixed uniformly in a high mixer to obtain a precursor; then the precursor is extruded with a twin-screw Extrude and granulate at 160°C in the first zone, 165°C in the second zone, 175°C in the third zone, 180°C in the fourth zone, 185°C in the fifth zone, 195°C in the sixth zone, 190°C at the head, and 120rpm of the screw speed to obtain Thermoplastic polyvinyl alcohol material.

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Abstract

The invention relates to a thermoplastic polyvinyl alcohol material. The thermoplastic polyvinyl alcohol material is prepared from, by weight, 100 parts of polyvinyl alcohol, 2-15 parts of polylactic acid, 10-40 parts of compound plasticizer and 1-8 parts of assistant. The raw materials are mixed to obtain a precursor, then the precursor is extruded by an extrusion machine, granulated or directly formed. The prepared thermoplastic polyvinyl alcohol material is high in tensile strength, excellent in mechanical property and good in processing fluidity, does not easily yellow and does not absorb moisture, and a preparation method is simple in process, low in carbon, environmentally friendly, shorter in preparation cycle and higher in production efficiency, and industrialization is easy to achieved.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a thermoplastic polyvinyl alcohol material and a preparation method thereof. Background technique [0002] Polyvinyl alcohol (PVA) is a biodegradable polymer material widely used in the fields of food, medicine, hygiene, and chemical industry. However, PVA contains a large number of hydroxyl groups, strong hydrogen bonds in the molecule, and high crystallinity, so that its melting point is very close to the decomposition temperature, and it is difficult to process and shape it by the commonly used melting thermoplastic processing method. At present, the most researched at home and abroad is to use some processing modification additives to blend and modify PVA to reduce its melting temperature or increase its decomposition temperature. However, the preparation process of the precursor in the prior art scheme is complex, the preparation cycle is long, the production efficiency is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08L67/04C08K5/053C08K5/09C08K5/134C08K5/098B29C47/92B29C48/92
CPCB29C48/92B29C2948/92704C08K2201/014C08L29/04C08L2201/06C08L67/04C08K5/053C08K5/09C08K5/1345C08K5/098
Inventor 舒友陈迪钊胡扬剑张再兴向德轩杨来福
Owner HUAIHUA UNIV
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