Polymer compatibilizers based on graphene oxide

A polymer and compatibilizer technology, applied in the field of polymer compatibilizers, can solve the problems of difficult synthesis of copolymer compatibilizers, high cost, reduction of blend rigidity, heat resistance, etc., to achieve compatibilization effect Good, low production cost, increased mechanical properties and thermal stability

Inactive Publication Date: 2013-07-31
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis of this type of copolymer compatibilizer is difficult and the cost is relatively high
In addition, most copolymer compatibilizers are elastomers with low modulus. Therefore, when used as compatibilizers, the rigidity and heat resistance of the blend will often be reduced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Using GO as a compatibilizer: 200mg GO was ultrasonically dispersed in 80mL THF; 3.8g PPO was added to the above GO dispersion, 50 o C after stirring for 2h at 45 o Ultrasonic at C for 1 h; after the mixture was precipitated in 800 mL of methanol, 40 o C Vacuum drying for 12h to obtain the PPO / 5wt%GO masterbatch; the above PPO / GO masterbatch and 36g PA were melted and mixed in a Haake internal mixer, and the condition was 210 o C, 10min, rotating speed 60rmp, and finally obtain a blend system composed of PPO / PA / GO (9.5 / 90 / 0.5). A blend of composition PPO / PA (10 / 90) was prepared in the same manner. The average size of the PPO dispersed phase in PPO / PA / GO (9.5 / 90 / 0.5) is not more than 1 μm, and the fracture strength is 27.0 MPa, while the average size of the PPO dispersed phase in the comparative sample is larger than 10 μm, and the fracture strength is 17.5 MPa.

Embodiment 2

[0017] Others are the same as Example 1. 400mg GO is ultrasonically dispersed in 80mL THF; 3.6g PPO is added in the above-mentioned GO dispersion liquid, 50 o After stirring at C for 2 hours, 45 o Ultrasonic at C for 1 h; after the mixture was precipitated in 800 mL of methanol, 40 o C vacuum dried for 12h to obtain PPO / 10wt%GO masterbatch; the above PPO / GO masterbatch and 36g PA were melted and mixed in an internal mixer, and the condition was 210 o C, 10min, rotating speed 60rmp, and finally obtain a blend system composed of PPO / PA / GO PPO / PA / GO (9 / 90 / 1.0). A blend of composition PPO / PA (10 / 90) was prepared in the same manner. The average size of the PPO phase in PPO / PA / GO (9 / 90 / 1.0) is not more than 1 μm, and the fracture strength is 32.7 MPa, while the average size of the PPO dispersed phase in the comparative sample is larger than 10 μm, and the fracture strength is 17.5 MPa.

Embodiment 3

[0019] Others are the same as in Example 1. But the ratio of PPO / PA / GO is 60:40:2.5. GO can also play a good role in increasing capacity.

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Abstract

The invention belongs to the technical field of polymer blends and carbon materials, and specifically relates to an application and an implementation method for blend compatibilizers based on graphene oxide. By virtue of the characteristic that the graphene oxide (or modified graphene oxide) can form different interactions with two components of the blend respectively, compatibilizers for some incompatible blending systems by using the graphene oxide (or modified graphene oxide) are developed. A specific implementation means of the graphene oxide for compatibilization is a two-step method. Firstly, solutions are mixed to obtain graphene oxide-containing polymer masterbatches or special materials; and secondly, the blending material compatibilized by the graphene oxide is obtained by a melting or solution processing means. Results show that the compatibilizers based on graphene oxide not only can increase the compatibility between the two components of the blend but also can significantly increase specific properties including mechanical strength, heat stability and the like of the blend material. The compatibilizers developed by the invention are cheap in cost of the raw materials, simple in preparation and suitable for large-scale production, and have good industrial production foundations and wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of polymer materials and nano functional materials, in particular to a polymer compatibilizer based on graphene oxide, which is characterized in that this type of compatibilizer is graphene oxide or functionalized graphene oxide, which can be used in Improve the compatibility of certain polymer blends. Background technique [0002] A polymer blend refers to a mixture of two or more polymers. The purpose of polymer blending is to make the blending components complement each other in performance, so as to develop materials with superior comprehensive properties. Since polymer blends are usually obtained by physically mixing the components, they are different from polymer copolymers. The properties of polymer blends are closely related to their morphological structure, and the morphology of the dispersed phase is one of the important factors determining their final properties. Since the different components ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K3/04C08K9/00C08K9/04C08J3/22C08L25/06C08L33/12C08L71/12C08L23/12C08L77/00
Inventor 冯嘉春曹也文叶士兵
Owner FUDAN UNIV
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