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Modified polylactic acid material

A polylactic acid material and polylactic acid technology, applied in the field of polymers, can solve problems such as poor mechanical strength, achieve the effects of increased elongation at break, simple synthesis path, and improved flexibility

Pending Publication Date: 2021-07-06
ZHEJIANG WANG YANG POLYMER MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the characteristics of molecular structure, polylactic acid material has poor mechanical strength.

Method used

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  • Modified polylactic acid material
  • Modified polylactic acid material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Synthesis of cinnamon acetal ethyl diacrylate:

[0044] Take parts by mass

[0045] Cinnamaldehyde: 10 parts

[0046] Trimethyl orthoformate: 20 parts

[0047] Hydroxyethyl acrylate: 20 parts

[0048] Toluenesulfonic acid: 0.1 parts.

[0049] Step A: Take cinnamaldehyde and trimethyl orthoformate, dissolve them in a methanol solution with 80 parts by weight, add 0.05 parts of toluenesulfonic acid as a catalyst, and keep stirring at 1000 r / min at 65°C. After reacting for 6 hours, the cinnamon diacetal was extracted, the extraction process was extracted with dichloromethane, and the organic layer was collected to obtain the cinnamon diacetal;

[0050] Step B: Add hydroxyethyl acrylate to the cinnamon diacetal obtained in step A, and add 80 parts by weight of chloroform as a solvent, then add 0.05 parts of toluenesulfonic acid as a catalyst, and keep at 65°C at 1000r / min Under stirring, react for 6 hours to obtain ethyl cinnamon acetal diacrylate.

[0051] The ethyl ...

Embodiment 2

[0053] Polylactic acid: 80 parts

[0054] Dicumyl peroxide: 1 part

[0055] tert-butylhydroquinone: 1 part

[0056] Dioctyl phthalate: 1 part

[0057] Cinnamon acetal ethyl diacrylate prepared in Example 1: 5 parts;

[0058] Mix polylactic acid, solubilizer, antioxidant, plasticizer, and cinnamon acetal ethyl diacrylate evenly, add them to a twin-screw extruder, heat up to 150°C for extrusion, and the extrusion time is 5 minutes to obtain Modified polylactic acid material.

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Abstract

The invention discloses a modified polylactic acid material. The material is prepared from, by weight, 50 to 100 parts of polylactic acid, 1 to 3 parts of solubilizing agents, 1 to 2 parts of antioxidants, 1 to 2 parts of plasticizers and 5 to 10 parts of cinnamyl acetal ethyl diacrylate. According to the invention, the polylactic acid is modified mainly by adding cinnamyl acetal ethyl diacrylate, double bonds at two ends of the cinnamyl acetal ethyl diacrylate can react with end groups of the polylactic acid, and the cinnamyl acetal ethyl diacrylate brings rigid groups to the whole polylactic acid molecule, so that the tensile strength is improved, meanwhile, the flexibility of the whole material is also improved, and the elongation at break of polylactic acid is improved.

Description

technical field [0001] The invention relates to the field of macromolecules, in particular to a modified polylactic acid material. Background technique [0002] Polylactic acid, also known as polylactide, is a polyester polymer obtained by polymerizing lactic acid as the main raw material. It is a new type of biodegradable material. Due to the characteristics of molecular structure, polylactic acid material has poor mechanical strength. Contents of the invention [0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a modified polylactic acid material with enhanced mechanical properties. [0004] To achieve the above object, the present invention provides the following technical solutions: [0005] A modified polylactic acid material, [0006] Comprising the following parts by weight: [0007] Polylactic acid: 50-100 parts [0008] Solubilizer: 1 to 3 parts [0009] Antioxidant: 1 to 2 parts [0010] Plasticizer: 1 ...

Claims

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Application Information

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IPC IPC(8): C08G63/91C08G63/08C07C41/56C07C43/303C07C67/08C07C69/54B01J31/02
CPCC08G63/912C08G63/08C07C41/56C07C67/08B01J31/0225
Inventor 汪卓颖诸梓铭汪子涵陈浩翔汪徳兴汪德柱
Owner ZHEJIANG WANG YANG POLYMER MATERIALS
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