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Method for preparing high-toughness degradable material by using melt-grafting blending method

A technology for melting grafting and degrading materials, which is applied in the field of preparing high-toughness degradable materials by a melting-grafting blending method, can solve the problems of complex process, lack of toughening effect, and difficulty in industrialized production, and achieves simple process, Good application prospect, low cost effect

Inactive Publication Date: 2012-07-18
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] According to the above basic process, it can be seen that the defect of the prior art is that in the toughening and modification of PHBV, the chemical modification has a good toughening effect but the process is complicated and difficult to form industrialized production, while the physical modification with simple and easy-to-operate process is not necessary. To a more ideal toughening effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] PCL powder: molecular weight 10,000; anhydride: MAH; initiator: BPO;

[0029] (1) PCL, MAH and BPO (PCL, MAH and BPO are 100:1:0.5 by mass percentage) are melt grafted and mixed in the twin-screw, wherein the screw temperature is the feeding zone: 50 ° C, the preheating zone: 75 ℃, dissolution zone: 120 ℃, compression zone: 125 ℃, discharge port: 130 ℃; screw speed: 30 rpm, after blending, enter the pelletizing mechanism to obtain modified PCL pellets; (2) mix PHBV, modified PCL pellets, GMA and DCP (HV content in PHBV is 0; PHBV, modified PCL, GMA and DCP are 100:5:0.5:0.5 by mass percentage) are melt-grafted and mixed in twin-screw, and melt-blended grafting Temperature, feeding zone: 100°C, preheating zone: 135°C, melting zone: 170°C, compression zone: 165°C, discharge port: 160°C; screw speed: 50 rpm, elongation at break through mechanical testing The rate is 120%.

Embodiment 2

[0031] PCL powder: molecular weight 30,000; anhydride: MAH; initiator: AIBN;

[0032] (1) Blend and graft PCL, phthalic anhydride and BPO (PCL, phthalic anhydride and AIBN are 100:10:0.5 by mass percentage) in an internal mixer, mixing temperature: 70 ℃; screw speed: 40rad / s, modified PCL pellets were obtained after blending;

[0033](2) PHBV, modified PCL pellets, IBMA and DIBP (HV content in PHBV is 40%; PHBV, modified PCL pellets, IBMA and DIBP are 100:10:10:0.5 by mass percentage) in twin-screw Carry out melt grafting and mixing, melt blending grafting temperature, feed zone: 100°C, preheating zone: 135°C, melting zone: 150°C, compression zone: 170°C, outlet: 150°C; screw speed: 50 rpm, and the elongation at break was 318% through mechanical testing.

Embodiment 3

[0035] PCL powder: molecular weight 80,000, average particle size 10μm; acid anhydride: MAH; initiator: DCP;

[0036] (1) PCL, MAH and cumene hydroperoxide (PCL, MAH and DCP are 100: 3: 0.5 by mass percent) are carried out in twin-screw for melting and grafting mixing, wherein screw rod temperature is feed zone: 50 ℃, Preheating zone: 75°C, dissolution zone: 120°C, compression zone: 125°C, outlet: 130°C; screw speed: 12 rpm, after blending, enter the pelletizing mechanism to obtain modified PCL pellets;

[0037] (2) PHBV, modified PCL pellets, HEMA and TBH (HV content in PHBV is 10%; PHBV, modified PCL, HEMA and TBH are 100:30:3:0.5 by mass percentage) are melted in twin-screw Graft mixing, screw melt blending temperature, feed zone: 140°C, preheating zone: 165°C, melting zone: 170°C, compression zone: 160°C, outlet: 160°C; screw speed: 30 rpm , The elongation at break was 355% by mechanical testing.

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Abstract

The invention relates to a method for preparing a high-toughness degradable material by using a melt-grafting blending method, which comprises the following steps: (1) carrying out melt-grafting on polycaprolactone PCL, anhydride and an initiator, and then obtaining modified polycaprolactone by way of extrusion granulation, wherein the mass ratio of the polycaprolactone PCL to the anhydride to the initiator is 100: (1 to 10): 0.5; and (2) carrying out melt-grafting blending on poly (3-hydroxybutyrate-3-hydroxyvalerate) PHBV, the modified polycaprolactone, methyl acrylate and an initiator, andthen obtaining the high-toughness PHBV-class degradable material by way of extrusion granulation, wherein the mass ratio of the poly (3-hydroxybutyrate-3-hydroxyvalerate) PHBV to the modified polycaprolactone to the methyl acrylate to the initiator is 100: (5 to 50): (0.5 to 10):0.5, the processing temperature is 100 to 170 DEG C, and the screw speed is 50-80 R.P.M. The method is simple in process, low in cost, and suitable for industrialization, and the elongation at break of the produced PHBV-class degradable material can reach 560 percent; therefore, the method of the invention has good application prospect.

Description

technical field [0001] The invention belongs to the field of toughened biodegradable plastics, in particular to a method for preparing high-toughness degradable materials by adopting a melting graft blending method. Background technique [0002] With the advancement of science and technology and the development of green chemistry, various degradable polymer materials have attracted great attention. At present, environmentally degradable plastics mainly include biodegradable plastics, photodegradable plastics and photo / biodegradable plastics. PHB (poly(3-hydroxybutyrate)) and PHBV (poly(3-hydroxybutyrate-3-hydroxyvalerate)) in the family of biodegradable plastics are a class of aliphatic polyesters synthesized by microorganisms. It has many excellent properties and has attracted great attention from people. The structural formulas of the repeating units HB and HV of PHB and PHBV are as follows: [0003] HB: -[O-CH(CH 3 )-CH 2 -CO-] [0004] HV: -[O-CH(C 2 h 5 )-CH 2 -...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F291/06C08F285/00C08F283/02B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 陈彦模刘洋张瑜俞昊吴纯磊
Owner DONGHUA UNIV