Method for preparing completely-degradable composite material through acid anhydride and microcrystalline cellulose synergetic modification on poly(propylene carbonate)

A technology of polymethylethylene carbonate and microcrystalline cellulose, which is applied in the field of polymer composite material preparation, can solve the problems of reduced toughness and insufficient heat resistance of PPC, and achieve good processing performance, full price degradation, and small size Effect

Inactive Publication Date: 2015-11-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Among the above-mentioned various treatment methods, the actual research results show that the method of mod

Method used

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  • Method for preparing completely-degradable composite material through acid anhydride and microcrystalline cellulose synergetic modification on poly(propylene carbonate)
  • Method for preparing completely-degradable composite material through acid anhydride and microcrystalline cellulose synergetic modification on poly(propylene carbonate)
  • Method for preparing completely-degradable composite material through acid anhydride and microcrystalline cellulose synergetic modification on poly(propylene carbonate)

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] The number average molecular weight of the PPC used is 5.91×10 4 , the dried PPC and maleic anhydride (MA) were mixed according to the mass ratio of 100:0.5, 100:1, 100:3, 100:5 to form a premix of 4 samples, and then put into the twin-screw extrusion Prepare maleic anhydride-capped PPC in the extruder, the screw speed is 80r / min, the die head temperature of the extruder is 120°C, and the products are respectively marked as PPC-MA0.5, PPC-MA1, PPC-MA3, PPC-MA5 .

[0031] At the same time, a pure PPC sample without MA was prepared as a blank control, which was labeled as pure PPC.

[0032] Select the same amount of sample obtained by extrusion and observe it with an infrared scanner. The spectrum of PPC-MA1 is at 1640cm -1 An obvious absorption peak appeared at , indicating that MA successfully capped PPC.

[0033] Select the same amount of samples obtained by extrusion, and use a thermogravimetric analyzer for TG analysis in a nitrogen environment...

Example Embodiment

[0037] Example 2

[0038] The number average molecular weight of the PPC used is 9.17×10 4 , mix the dried PPC with maleic anhydride (MA), phthalic anhydride (PA), and pyromellitic dianhydride (PMDA) respectively at a mass ratio of 100:1 to form a premix of 3 samples , and then put into the twin-screw extruder respectively to prepare three different types of anhydride-terminated PPC, the screw speed is 80r / min, the die head temperature of the extruder is 120°C, and the products are marked PPC-MA1, PPC-PA1, PPC respectively -PMDA1.

[0039] At the same time, a pure PPC sample without acid anhydride was prepared as a blank control, which was labeled as pure PPC.

[0040]Choose 4 kinds of samples obtained by extrusion of the same amount, carry out thermal stability analysis according to the method identical with example 1, the T of pure PPC, PPC-MA1, PPC-PA1, PPC-PMDA1 -5％ , T -50％ , T -95％ As shown in table 2.

[0041] The thermal decomposition temperature value of table 2...

Example Embodiment

[0045] Example 3

[0046] The number average molecular weight of the PPC used is 9.17×10 4 , mix the dried PPC with maleic anhydride (MA), phthalic anhydride (PA), and pyromellitic dianhydride (PMDA) respectively at a mass ratio of 100:1 to form a premix of 3 samples , and then put into the twin-screw extruder respectively to prepare three different types of anhydride-terminated PPC, the screw speed is 80r / min, the die head temperature of the extruder is 120°C, and the products are marked PPC-MA1, PPC-PA1, PPC respectively -PMDA1.

[0047] At the same time, a pure PPC sample without acid anhydride was prepared as a blank control, which was labeled as pure PPC.

[0048] Take four samples of the same amount for extrusion experiments, first vacuum-dry them at 60°C for 24 hours, then put each sample into a flat vulcanizer and press it into tablets, and perform mechanical property tests according to the standard sample preparation of IOS527-2 and IOS179-1982. The results are sho...

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Abstract

The present invention discloses a method for preparing a completely-degradable composite material through acid anhydride and microcrystalline cellulose synergetic modification on poly(propylene carbonate), wherein 50-95 parts by mass of degradable poly(propylene carbonate), 0.1-10 parts by mass of an acid anhydride and 5-50 parts by mass of microcrystalline cellulose are subjected to melt mixing to form a master batch of a completely-degradable composite material, and mold pressing molding is performed to obtain the sample. According to the present invention, the completely-degradable composite material prepared through the method has characteristics of good mechanical property and good thermal stability, and the processing stability and the mechanical property of the prepared product can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of polymer composite material preparation, in particular to a method for preparing a fully degradable composite material by synergistically modifying polymethylethylene carbonate with acid anhydride and microcrystalline cellulose. Background technique [0002] Polymethylethylene carbonate (PPC) is made of carbon dioxide (CO 2 ) and propylene oxide synthesis of a fully biodegradable plastic for large-scale comprehensive utilization of CO 2 to open up a path. Using CO 2 Synthesizing PPC as a raw material, on the one hand, can reduce the dependence of plastics on petroleum resources; on the other hand, a fully biodegradable material can be obtained, which will alleviate the greenhouse effect to a certain extent and help reduce "white pollution". Moreover, polymethylethylene carbonate has excellent gas barrier properties, biocompatibility and easy processing, and is an environmentally friendly material with g...

Claims

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Application Information

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IPC IPC(8): C08L51/08C08L1/02C08F283/02B29B7/28
Inventor 蒋果张水洞冯健张梦迪
Owner SOUTH CHINA UNIV OF TECH
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