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Ultralight styrene-ethylene/butylene-styrene block copolymer (SEBS) modified material and preparation method thereof

A technology of modified materials and thermoplastic elastomers, which is applied in the field of ultra-light SEBS modified materials and its preparation, can solve the problems of poor compression set, poor fluidity, high density, etc., and achieve increased hardness, improved melt index, and enhanced interface bonding force effect

Inactive Publication Date: 2018-03-13
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in general, pure SEBS is not used alone as a thermoplastic elastomer material
Compared with traditional vulcanized rubber, SEBS has the disadvantages of high density and relatively poor compression set; at the same time, as a high molecular weight block copolymer, SEBS has high viscosity and poor fluidity after high-temperature melting, making it difficult to Direct processing on plastic molding processing equipment

Method used

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  • Ultralight styrene-ethylene/butylene-styrene block copolymer (SEBS) modified material and preparation method thereof
  • Ultralight styrene-ethylene/butylene-styrene block copolymer (SEBS) modified material and preparation method thereof
  • Ultralight styrene-ethylene/butylene-styrene block copolymer (SEBS) modified material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] An ultra-light SEBS modified material, the components are calculated by weight: 100 parts of SEBS, 100 parts of naphthenic oil, 30 parts of polypropylene, 5 parts of hollow glass microspheres, 0.05 parts of silane coupling agent KH-550, Titanate coupling agent 201 0.05 part, antioxidant 1010 0.1 part.

[0039]The preparation method of above-mentioned ultra-light SEBS modified material, comprises the steps:

[0040] (1) Pre-mix the SEBS material and naphthenic oil in proportion, put it into a high-speed mixer and mix it at 70°C for 30-50 minutes, mix it evenly and place it at room temperature for more than 48 hours to obtain an oil-extended SEBS thermoplastic elastomer;

[0041] (2) Put the hollow glass microspheres into an electrothermal constant temperature blower dryer and dry them at 80°C for 3 hours, dilute the silane coupling agent KH-550 and titanate coupling agent 201 with ethanol with a volume concentration of 90% to 3wt% The solution; the diluted coupling agen...

Embodiment 2

[0047] An ultra-light SEBS modified material, the components are calculated by weight: 100 parts of SEBS, 100 parts of naphthenic oil, 30 parts of polypropylene, 10 parts of hollow glass microspheres, 0.05 parts of silane coupling agent KH-550, Titanate coupling agent 201 0.05 part, antioxidant 1010 0.1 part. The preparation method is the same as in Example 1, and the ultra-light SEBS modified material prepared in this example and Comparative Example 1 are tested. For specific data, see Figure 4 , Figure 5 The test results show that the weight of the ultra-light SEBS modified material prepared in this embodiment is reduced by 10.7%, the tensile strength is increased by 5.6%, the hardness is increased by 11.2%, and the melt index is increased by 4.8%.

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Abstract

The invention belongs to the technical field of high polymer materials, and in particular relates to an ultralight styrene-ethylene / butylene-styrene block copolymer (SEBS) modified material and a preparation method thereof. The ultralight SEBS modified material is prepared from the following components in parts by weight: 100 parts of SEBS, 50-120 parts of naphthenic oil, 22-50 parts of polypropylene, 4-8 parts of hollow glass beads, 0.05-0.1 part of a coupling agent and 0.1-0.5 part of an antioxidant. The ultralight SEBS modified material has the characteristics of being light in weight, highin strength and high in stability, and the mechanical properties (such as tensile strength and hardness) of the ultralight SEBS modified material are greatly improved; furthermore, the melt index isalso improved to a certain extent, so that the ultralight SEBS modified material is beneficial to processing.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to an ultra-light SEBS modified material and a preparation method thereof. Background technique [0002] SEBS thermoplastic elastomer, full name styrene-ethylene-butylene-styrene block copolymer (Styrene-Ethylene / Butylene-Styrene Block Co-polymer), is composed of styrene-butadiene-styrene block copolymer ( SBS) (Styrene-Butadiene / Styrene Block Co-polymer) is prepared by selective hydrogenation. At room temperature, the hard plastic block of the PS segment of SEBS, and the middle ethylene / butylene (EB) elastomer block, these two blocks are thermodynamically incompatible with each other, resulting in a two-phase structure, which is Microscopic phase separation state. The PS segment of SEBS forms a phase domain, is dispersed in the rubber phase formed by the EB segment, and forms a physical cross-linked network with the EB segment. With the increase of PS conte...

Claims

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Application Information

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IPC IPC(8): C08L53/02C08L91/00C08L53/00C08K13/06C08K9/04C08K9/06C08K7/28C08K5/134C08K5/526
CPCC08L53/025C08L2205/02C08L2205/03C08L91/00C08L53/00C08K13/06C08K9/04C08K9/06C08K7/28C08K5/1345C08K5/526
Inventor 严岿聂畅邓益祺姜旭雷诗棋华林王辉
Owner WUHAN UNIV OF TECH
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