Thermoplastic biodegradable plastic and preparation method thereof

Abstract

The invention relates to the technical field of degradable plastics, and in particular, relates to a thermoplastic biodegradable plastic and a preparation method thereof. The thermoplastic biodegradable plastic comprises the following raw materials in parts by mass: 20-40 parts of starch, 20-60 parts of poly(butylene adipate-co-terephthalate), 60-100 parts of epoxypropane, 30-50 parts of dichloromethane, 30-50 parts of hydrochloric acid, 30-50 parts of a methanol solution, 1-10 parts of maleic anhydride, 10-20 parts of calcium carbonate, 5-15 parts of a cross-linking agent and 1-10 parts of a catalyst. The raw materials have good compatibility, and the plastic has good biodegradability, good thermoplasticity, high mechanical strength, simple production and low production cost, and has positive significance for environmental protection and actual production application.

Description

technical field

[0001] The invention relates to the technical field of degradable plastics, in particular to a thermoplastic biodegradable plastic and a preparation method thereof. Background technique

[0002] With the advantages of low cost, strong plasticity and light weight, plastics quickly occupy an extremely important market in the world industry. The market demand for plastic products mainly focuses on agricultural plastic products, packaging plastic products, construction plastic products, industrial transportation and engineering plastic products, etc. . With the widespread use of plastic products and the discarding of plastic product waste, because traditional plastics are difficult to degrade and plastic waste brings serious environmental problems, more and more people realize the importance of developing degradable plastics to replace traditional plastics .

[0003] Biodegradable plastics are considered to be one of the important ways to solve the "white pollu...

Examples

Embodiment 1

[0026] A thermoplastic biodegradable plastic, comprising the following raw materials in parts by mass: 20 parts of starch, 20 parts of polybutylene adipate terephthalate, 60 parts of propylene oxide, 30 parts of methylene chloride, 30 parts of hydrochloric acid, 30 parts of methanol solution, 1 part of maleic anhydride, 10 parts of calcium carbonate, 5 parts of crosslinking agent, and 1 part of catalyst;

[0027] The preparation method of described thermoplastic biodegradable plastics, comprises the following steps:

[0028] Step 1: Add mass parts of catalyst to stainless steel autoclave, dry at 80°C for 24 hours, add mass parts of propylene oxide and maleic anhydride, and introduce CO 2 Gas, make the pressure reach 4MPa, the stirring speed is 100r / min, the reaction temperature is 70°C, react for 24h, after the reaction stops, cool to room temperature to obtain a viscous substance;

[0029] Step 2: Rinse the viscous matter twice with dichloromethane, hydrochloric acid, and di...

Embodiment 2

[0032] A thermoplastic biodegradable plastic, comprising the following raw materials in parts by mass: 40 parts of starch, 60 parts of polybutylene adipate terephthalate, 100 parts of propylene oxide, 50 parts of methylene chloride, 50 parts of hydrochloric acid, 50 parts of methanol solution, 10 parts of maleic anhydride, 20 parts of calcium carbonate, 15 parts of crosslinking agent, 10 parts of catalyst;

[0033] The preparation method of described thermoplastic biodegradable plastics, comprises the following steps:

[0034] Step 1: Add mass parts of catalyst to stainless steel autoclave, dry at 90°C for 24 hours, add mass parts of propylene oxide and maleic anhydride, and introduce CO 2 Gas, so that the pressure reaches 6MPa, the stirring speed is 300r / min, the reaction temperature is 90°C, and the reaction is for 24h. After the reaction stops, cool to room temperature to obtain a viscous substance;

[0035] Step 2: Rinse the viscous matter three times with dichloromethane...

Embodiment 3

[0038] A thermoplastic biodegradable plastic, comprising the following raw materials in parts by mass: 30 parts of starch, 40 parts of polybutylene adipate terephthalate, 80 parts of propylene oxide, 40 parts of methylene chloride, 40 parts of hydrochloric acid, 40 parts of methanol solution, 5 parts of maleic anhydride, 15 parts of calcium carbonate, 10 parts of crosslinking agent, 5 parts of catalyst;

[0039]The preparation method of described thermoplastic biodegradable plastics, comprises the following steps:

[0040] Step 1: Add mass parts of catalyst to stainless steel autoclave, dry at 85°C for 24 hours, add mass parts of propylene oxide and maleic anhydride, and introduce CO 2 Gas, so that the pressure reaches 5MPa, the stirring speed is 200r / min, the reaction temperature is 80°C, react for 24h, after the reaction stops, cool to room temperature to obtain a viscous substance;

[0041] Step 2: Rinse the viscous matter three times with dichloromethane, hydrochloric aci...

technical field

[0001] The invention relates to the technical field of degradable plastics, in particular to a thermoplastic biodegradable plastic and a preparation method thereof. Background technique

[0002] With the advantages of low cost, strong plasticity and light weight, plastics quickly occupy an extremely important market in the world industry. The market demand for plastic products mainly focuses on agricultural plastic products, packaging plastic products, construction plastic products, industrial transportation and engineering plastic products, etc. . With the widespread use of plastic products and the discarding of plastic product waste, because traditional plastics are difficult to degrade and plastic waste brings serious environmental problems, more and more people realize the importance of developing degradable plastics to replace traditional plastics .

[0003] Biodegradable plastics are considered to be one of the important ways to solve the "white pollu...

Examples

Embodiment 1

[0026] A thermoplastic biodegradable plastic, comprising the following raw materials in parts by mass: 20 parts of starch, 20 parts of polybutylene adipate terephthalate, 60 parts of propylene oxide, 30 parts of methylene chloride, 30 parts of hydrochloric acid, 30 parts of methanol solution, 1 part of maleic anhydride, 10 parts of calcium carbonate, 5 parts of crosslinking agent, and 1 part of catalyst;

[0027] The preparation method of described thermoplastic biodegradable plastics, comprises the following steps:

[0028] Step 1: Add mass parts of catalyst to stainless steel autoclave, dry at 80°C for 24 hours, add mass parts of propylene oxide and maleic anhydride, and introduce CO 2 Gas, make the pressure reach 4MPa, the stirring speed is 100r / min, the reaction temperature is 70°C, react for 24h, after the reaction stops, cool to room temperature to obtain a viscous substance;

[0029] Step 2: Rinse the viscous matter twice with dichloromethane, hydrochloric acid, and di...

Embodiment 2

[0032] A thermoplastic biodegradable plastic, comprising the following raw materials in parts by mass: 40 parts of starch, 60 parts of polybutylene adipate terephthalate, 100 parts of propylene oxide, 50 parts of methylene chloride, 50 parts of hydrochloric acid, 50 parts of methanol solution, 10 parts of maleic anhydride, 20 parts of calcium carbonate, 15 parts of crosslinking agent, 10 parts of catalyst;

[0033] The preparation method of described thermoplastic biodegradable plastics, comprises the following steps:

[0034] Step 1: Add mass parts of catalyst to stainless steel autoclave, dry at 90°C for 24 hours, add mass parts of propylene oxide and maleic anhydride, and introduce CO 2 Gas, so that the pressure reaches 6MPa, the stirring speed is 300r / min, the reaction temperature is 90°C, and the reaction is for 24h. After the reaction stops, cool to room temperature to obtain a viscous substance;

[0035] Step 2: Rinse the viscous matter three times with dichloromethane...

Embodiment 3

[0038] A thermoplastic biodegradable plastic, comprising the following raw materials in parts by mass: 30 parts of starch, 40 parts of polybutylene adipate terephthalate, 80 parts of propylene oxide, 40 parts of methylene chloride, 40 parts of hydrochloric acid, 40 parts of methanol solution, 5 parts of maleic anhydride, 15 parts of calcium carbonate, 10 parts of crosslinking agent, 5 parts of catalyst;

[0039]The preparation method of described thermoplastic biodegradable plastics, comprises the following steps:

[0040] Step 1: Add mass parts of catalyst to stainless steel autoclave, dry at 85°C for 24 hours, add mass parts of propylene oxide and maleic anhydride, and introduce CO 2 Gas, so that the pressure reaches 5MPa, the stirring speed is 200r / min, the reaction temperature is 80°C, react for 24h, after the reaction stops, cool to room temperature to obtain a viscous substance;

[0041] Step 2: Rinse the viscous matter three times with dichloromethane, hydrochloric aci...

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