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A kind of polypropylene macromolecule stiffening nucleating agent and its preparation method and application

A polypropylene and macromolecular technology, applied in the field of polypropylene macromolecular stiffening nucleating agent and its preparation, can solve the problems of poor compatibility, poor dispersibility, and accelerate the formation of α crystal form, and achieve good dispersibility and accelerated crystallization. rate, the effect of increasing the crystallization temperature

Active Publication Date: 2021-10-29
杭州聚丰新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The object of the present invention is to overcome the deficiency of existing nucleating agent and polypropylene compatibility, poor dispersibility, provide a kind of polypropylene macromolecule stiffening nucleating agent and its preparation method and application, this nucleating agent and polypropylene Excellent compatibility, can significantly accelerate the formation of α-crystal form and improve the mechanical properties of polypropylene products

Method used

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  • A kind of polypropylene macromolecule stiffening nucleating agent and its preparation method and application
  • A kind of polypropylene macromolecule stiffening nucleating agent and its preparation method and application
  • A kind of polypropylene macromolecule stiffening nucleating agent and its preparation method and application

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Effect test

Embodiment 1

[0036] Mix 0.2 parts of dicumyl peroxide, 20 parts of 4-vinylbiphenyl, and 0.1 part of sodium phosphate evenly, and melt and mix them together with 100 parts of polypropylene on an internal mixer at 190°C for 10 minutes. The rotation speed of the internal mixer is 80r / min, after cooling, a polypropylene macromolecular stiffening nucleating agent is obtained, which is denoted as A1.

[0037] After uniformly mixing 0.1 part of A1 and 100 parts of polypropylene, it was fed into an extruder at 190°C to melt, extrude and granulate to obtain stiffened polypropylene, which was designated as B1.

[0038] Infrared test method: A1 is first extracted with acetone, unreacted 4-vinyl biphenyl and blended sodium phosphate are extracted and removed, and after drying, infrared test is carried out to obtain figure 1 Infrared spectrum of polypropylene grafted with 4-vinylbiphenyl shown in .

[0039] Grafting rate calculation method: After blending different proportions of polypropylene and 4-...

Embodiment 2

[0041] Mix 0.2 parts of dicumyl peroxide, 10 parts of 4-vinyl biphenyl, and 0.1 parts of sodium phosphate evenly, and melt and mix them together with 100 parts of polypropylene on an internal mixer at 190°C for 10 minutes. The rotation speed of the internal mixer is 80r / min, after cooling, a polypropylene macromolecular stiffening nucleating agent is obtained, which is denoted as A2.

[0042] After mixing 0.03 parts of A2 and 100 parts of polypropylene evenly, put them into an extruder at 190°C to melt, extrude and granulate to obtain stiffened polypropylene, which is designated as B2.

Embodiment 3

[0044] After mixing 0.1 part of A2 and 100 parts of polypropylene evenly, they were fed into an extruder at 190°C to melt, extrude and granulate to obtain modified polypropylene, which was designated as B3.

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Abstract

The invention relates to the field of macromolecular materials, and discloses a polypropylene macromolecular stiffening nucleating agent, which comprises phosphate and polypropylene grafted vinyl biphenyl derivatives. The preparation method is to prepare 100 parts of polypropylene by mass, 0.5-30 parts of biphenyl derivatives, 0.01-0.2 parts of phosphate, 0.05-0.5 parts of initiator; after mixing the raw materials, they are melted and mixed in a blending equipment at 160-220°C to obtain polypropylene macromolecular stiffened nucleation agent. The polypropylene macromolecule rigidifying nucleating agent of the present invention has more prominent advantages in compatibility and dispersibility with polypropylene; the blended phosphate and the side branches of vinyl biphenyl derivatives in the structure serve as polypropylene The nucleation site of crystallization increases the density of crystal nucleation, accelerates the crystallization rate, reduces the size of spherulites, and increases the crystallization temperature of polypropylene. Compared with single benzene ring and acrylate macromolecular nucleating agents, the present invention The stiffening nucleating agent can significantly improve the mechanical properties of polypropylene.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a polypropylene macromolecule rigidifying nucleating agent and a preparation method and application thereof. Background technique [0002] Polypropylene (PP) is widely used due to its high melting point, good toughness, corrosion resistance, and strong static load capacity. Coating and foaming applications. Polypropylene is a crystalline polymer, and its crystallization behavior, crystal morphology and spherulite size all directly affect the final properties of the product. [0003] Polypropylene has five crystal forms of α, β, γ, δ and pseudo-hexagonal state. The α crystal form is the most common. Under normal processing conditions, the homogeneous structure of the melt naturally cooled is mainly the α crystal form. Polypropylene with α-crystal form has excellent properties such as rigidity enhancement, heat distortion temperature increase, creep resistance, turbidity reductio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L51/06C08K3/32C08F255/02C08F212/32
CPCC08F255/02C08K3/32C08K2003/324C08L51/06C08F212/32
Inventor 王笛张才亮宋顺刚洪东海
Owner 杭州聚丰新材料有限公司
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