Method for regulation and control of crystal form of isotatic polypropylene (iPP)-ethylene propylene diene monomer (EPDM) rubber-plastic blended material by double constant temperature heating stages

A technology of EPDM10, rubber and plastic, which is applied in the field of regulating the crystal form of iPP-EPDM rubber and plastic blend materials with double constant temperature heating stages, achieving the effects of low equipment cost, convenient operation and simple method

Active Publication Date: 2016-02-03
ANHUI UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention aims to solve the difficulties encountered in the controllable crystal form of the existing isotactic polypropylene (iP...

Method used

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  • Method for regulation and control of crystal form of isotatic polypropylene (iPP)-ethylene propylene diene monomer (EPDM) rubber-plastic blended material by double constant temperature heating stages
  • Method for regulation and control of crystal form of isotatic polypropylene (iPP)-ethylene propylene diene monomer (EPDM) rubber-plastic blended material by double constant temperature heating stages
  • Method for regulation and control of crystal form of isotatic polypropylene (iPP)-ethylene propylene diene monomer (EPDM) rubber-plastic blended material by double constant temperature heating stages

Examples

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Effect test

Embodiment 1

[0027] The present invention regulates the crystal form in the iPP-EPDM rubber-plastic blended material according to the following steps:

[0028] First, 80 parts by mass of isotactic polypropylene (Sinopec Yangzi Petrochemical Co., Ltd., brand F401), 20 parts by mass of EPDM, and 0.1 parts by mass of nucleating agent TMB-5 (Shanxi Chemical Research Institute) were mixed in absolute ethanol Ultrasonic mixing is uniform at room temperature, and then the absolute ethanol is evaporated to dryness, and the mixed raw materials are put into a Haake torque rheometer for melt blending (temperature 170°C, mixing time 10min, rotor speed 60r / min), and then The sample was taken out and placed on the first constant-temperature heating stage (melting heating stage, constant temperature 180°C) for re-melting. After the sample was completely melted, it was quickly transferred to the second constant-temperature heating stage (crystallization heating stage, constant temperature 100°C). Under th...

Embodiment 2

[0031] The present invention regulates the crystal form in the iPP-EPDM rubber-plastic blended material according to the following steps:

[0032] First, 80 parts by mass of isotactic polypropylene (China Lanzhou Petrochemical Co., Ltd., brand T30S), 20 parts by mass of EPDM, and 0.1 part by mass of nucleating agent NT-C (Nanjing Chengkuan Trading Co., Ltd.) were ultrasonicated in xylene at room temperature. Mix well, then evaporate the xylene to dryness, add the Haake torque rheometer for melt mixing (temperature 170°C, mixing time 10min, rotor speed 60r / min), then take the sample out and put it in the first constant temperature Melt again on the hot stage (melting hot stage, the temperature of the hot stage is controlled at 180°C), and after the sample is completely melted, it is quickly transferred to the second constant temperature hot stage (the crystallization hot stage, the temperature of the hot stage is controlled at 130°C). The isothermal crystallization was carried ...

Embodiment 3

[0035] The present invention regulates the crystal form in the iPP-EPDM rubber-plastic blended material according to the following steps:

[0036]First, 75 parts by mass of isotactic polypropylene (China Lanzhou Petrochemical Co., Ltd., brand T30S), 25 parts by mass of EPDM, 0.2 parts by mass of nucleating agent TMB-5 (Shanxi Chemical Research Institute), 2 parts by mass of sulfur and 2 parts by mass of zinc oxide. Parts by mass, ultrasonically mixed in acetone at room temperature, then evaporated acetone to dryness, added to a Haake torque rheometer for melt mixing (temperature 180 ° C, mixing time 12min, rotor speed 60r / min), and then The sample was taken out and put on the first constant temperature hot stage (melting hot stage, the temperature of the hot stage was controlled at 190°C) for re-melting. Temperature 130°C), and isothermal crystallization was carried out at this temperature for 20 minutes, and then the sample was rapidly cooled to room temperature to obtain iPP...

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Abstract

The invention discloses a method for regulation and control of a crystal form of an isotatic polypropylene (iPP)-ethylene propylene diene monomer (EPDM) rubber-plastic blended material by double constant temperature heating stages. The method comprises carrying out ultrasonic mixing dispersion on a beta nucleating agent, iPP, EPDM and a sulfuration auxiliary agent in a solvent, adding the mixture into a Haake torque rheometer, carrying out melt blending, carrying out melting on a temperature programmed control heating stage, and carrying out isothermal crystallization at a specific temperature so that the polypropylene crystal form of the iPP-EPDM blended material is selectively regulated and controlled and high-content beta crystal form is obtained. The method solves the problem that the prior art is difficult in polypropylene crystal form regulation and control, is convenient for polypropylene alpha crystal form and beta crystal form selective regulation and control and satisfies requirements on polypropylene crystal form regulation and control convenience.

Description

technical field [0001] The invention relates to a method for controlling the crystal form in a material by adjusting the crystallization temperature, in particular to a method for regulating the crystal form in an iPP-EPDM rubber-plastic blend material by using double constant temperature heating stages. technical background [0002] Polypropylene (PP) is one of the four general-purpose plastics in the world. It has the characteristics of high tensile strength, stable chemical properties, and easy molding and processing. It is widely used in automobiles, construction, and food packaging. Polypropylene includes three types: isotactic polypropylene (iPP), syndiotactic polypropylene (sPP) and atactic polypropylene (aPP). The largest and most commonly used is iPP. However, iPP has disadvantages such as poor low-temperature brittleness and high product shrinkage, which limit its further promotion and application. In order to improve the toughness of iPP, rubber or elastomer is u...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/16
CPCC08L23/12C08L2205/242C08L2207/10C08L23/16
Inventor 杨斌邓艳丽夏茹钱家盛郑争志陈鹏苗继斌曹明张露露陆华阳胡磊石优
Owner ANHUI UNIVERSITY
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