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Polypropylene composition with low plastic deformation and high elastic recovery as well as preparation method and application thereof

A polypropylene composition and low plasticity technology, applied in the high elastic recovery polypropylene composition and its preparation, in the field of low plastic deformation, can solve the problems of low plastic deformation, high plastic deformation, poor elastic recovery and the like, and achieve low plasticity Deformation, improving elastic recovery ability, the effect of excellent elastic recovery performance

Pending Publication Date: 2022-02-11
KINGFA SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defects of high plastic deformation and poor elastic recovery described in the above-mentioned prior art, the present invention provides a polypropylene composition with low plastic deformation and high elastic recovery. POE forms a sea-island structure with large particle size in the PP matrix. Limiting the movement of PP molecular chains avoids plastic deformation caused by the slippage of sub-segments in the amorphous region, and provides potential energy for the rebound of subsequent materials; In the case of large deformation, it is still in elastic deformation; the sorbitol nucleating agent provides more heterogeneous nucleation points for PP, and at the same time avoids the formation of imperfect lamellae, effectively improving the elastic recovery ability of the material

Method used

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  • Polypropylene composition with low plastic deformation and high elastic recovery as well as preparation method and application thereof
  • Polypropylene composition with low plastic deformation and high elastic recovery as well as preparation method and application thereof
  • Polypropylene composition with low plastic deformation and high elastic recovery as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1～15

[0061] Embodiments 1 to 15 respectively provide a polypropylene composition, the component contents are shown in Table 1, and the preparation method is as follows:

[0062] After mixing the components according to Table 1, add them to a twin-screw extruder, melt and mix, extrude and granulate to obtain a polypropylene composition;

[0063] Among them, the temperature of the plasticizing section of the twin-screw extruder is 190-210°C, the temperature of the die head is 200-220°C, and the pulling speed is 100-200mm / s.

[0064] The component content (parts by weight) of the polypropylene composition of table 1 embodiment 1~15

[0065]

[0066]

[0067]

Embodiment 1

[0079] The SEM collection of illustrative plates of embodiment 1 is as figure 1 As shown, the test results of Examples 1-15 and Comparative Examples 1-7 are shown in Table 3 and Table 4.

[0080] Depend on figure 1 It can be seen that in the polypropylene composition of the present invention, POE exists in the continuous phase of polypropylene as a larger-sized sea-island phase.

[0081] The test result of table 3 embodiment 1~15

[0082]

[0083] According to the test result of table 3, the obtained polypropylene composition in each embodiment of the present invention has excellent resilience performance, meets S 1 ≥96%, S 10 ≥94%, S 100 ≥88%, and after 100 deformations, the plastic deformation value is ≤12%.

[0084] From Examples 1-8, it can be seen that the melt flow rate of PP at 230°C and 2.16kg is 10-50g / 10min, and the melt flow rate of POE at 190°C and 2.16kg is 0.5-3g When / 10min, the polypropylene composition has better rebound performance and lower plastic ...

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Abstract

The invention discloses a polypropylene composition with low plastic deformation and high elastic recovery as well as a preparation method and application thereof. The polypropylene composition is prepared from the following components in parts by weight: 70 to 80 parts of PP, 5 to 10 parts of POE, 5 to 10 parts of UHMWPE, 1 to 2 parts of a sorbitol nucleating agent and 0 to 5 parts of other auxiliaries. The octene content in the POE is greater than or equal to 20%, and the number-average molecular weight of the UHMWPE is greater than or equal to 1 million. POE forms a large-particle-size sea-island structure in a PP matrix, so that the movement of a PP molecular chain is limited, and potential energy is provided for the rebound of a subsequent material; the UHMWPE improves entanglement of molecular chain segments in the polypropylene composition; and the sorbitol nucleating agent provides more heterogeneous nucleation points for PP, and the elastic recovery capability of the material is effectively improved. Through the synergistic effect of the POE, the UHMWPE, the sorbitol nucleating agent and the PP, the polypropylene composition has extremely low plastic deformation and excellent elastic recovery performance.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polypropylene composition with low plastic deformation and high elastic recovery, its preparation method and application. Background technique [0002] Polypropylene materials are widely used in the automotive industry, household appliances, sports equipment, etc. For components such as electrical switches, which are in switching operation for a long time, the material needs to have excellent elastic recovery performance (also known as rebound performance) during the opening and closing process, so as to avoid hidden dangers in the use of household appliances during the opening process; at the same time, it is also necessary to ensure In the long-term repeated opening and closing process, it has low plastic deformation. [0003] At present, there are two main ways to improve the elastic recovery performance of polypropylene materials: (1) filling high modulus polypro...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/08C08L23/06C08K5/1575
CPCC08L23/12C08L2205/24C08L2207/068C08L23/0815C08L23/06C08K5/1575Y02P70/10
Inventor 丁明笃陈平绪叶南飚杨霄云陆湛泉
Owner KINGFA SCI & TECH CO LTD
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