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. 2022 Apr 28;14(9):1795.
doi: 10.3390/polym14091795.

Mechanism and Influence Factors of Abrasion Resistance of High-Flow Grade SEBS/PP Blended Thermoplastic Elastomer

Shuwen Liu  1   2 , Jun Qiu  1 , Lili Han  3 , Xueyan Ma  3 , Wenquan Chen  3
Affiliations

Mechanism and Influence Factors of Abrasion Resistance of High-Flow Grade SEBS/PP Blended Thermoplastic Elastomer

Shuwen Liu et al. Polymers (Basel). .

Abstract

Hydrogenated styrene-butadiene-styrene block copolymer (SEBS)/polypropylene (PP) blended thermoplastic elastomer (TPE) is suitable for preparing the automotive interiors because of its excellent elasticity, softness, weather resistance, low odor, low VOC and other environmental-friendly properties. The skin of the automobile instrument panel is an appearance part, which requires excellent friction loss resistance of surface. In this paper, the high-flow SEBS/PP blended thermoplastic elastomer (TPE) suitable for the preparation of injection molding skins for automobile instrument panel was studied. By comparing the Taber abrasion and cross-scratch properties, the effects of SEBS's molecular weight, styrene content in the molecule, molecular structure and types of lubricating agents on the friction loss properties of the material were investigated. The results show that under the same SEBS molecular structure, the higher the molecular weight within a certain range, the better the wear resistance of high-flow SEBS/PP type TPE, but the ultra-high molecular weight exhibits lower wear resistance than high molecular weight; The high-flow SEBS/PP blended TPE prepared by medium styrene content SEBS has better abrasion resistance; TPE prepared by star SEBS is better than linear SEBS; Adding silane-based lubricating agents is beneficial to improve the friction loss resistance of the material, especially combined use of high and low molecular weight silicone.

Keywords: abrasion resistance; automotive interior; high-flow thermoplastic elastomer; hydrogenated styrene-butadiene-styrene block copolymer; injection molding soft skin.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Samples after cross-scratch test of TPE prepared by SEBS with similar structure and various molecular weights. (a) TPE-LW; (b) TPE-MW; (c) TPE-HW; (d) TPE-UHW.
Figure 2
Figure 2
TPE samples after Taber abrasion test of TPE prepared by SEBS with similar structures and various molecular weight. (a) TPE-LW; (b) TPE-MW; (c) TPE-HW; (d) TPE-UHW.
Figure 2
Figure 2
TPE samples after Taber abrasion test of TPE prepared by SEBS with similar structures and various molecular weight. (a) TPE-LW; (b) TPE-MW; (c) TPE-HW; (d) TPE-UHW.
Figure 3
Figure 3
40 times magnification of the wear scratch of samples with similar structures and various molecular weight SEBS after Taber test. (a) TPE-LW; (b) TPE-MW; (c) TPE-HW; (d) TPE-UHW; (e) the magnified view before Taber abrasion test.
Figure 3
Figure 3
40 times magnification of the wear scratch of samples with similar structures and various molecular weight SEBS after Taber test. (a) TPE-LW; (b) TPE-MW; (c) TPE-HW; (d) TPE-UHW; (e) the magnified view before Taber abrasion test.
Figure 4
Figure 4
Comparison of TPE cross-scratched samples prepared from SEBS with various styrene contents. (a) TPE-Ms/Hw; (b) TPE-Hs/Hw; (c) TPE-Hs/Lw.
Figure 4
Figure 4
Comparison of TPE cross-scratched samples prepared from SEBS with various styrene contents. (a) TPE-Ms/Hw; (b) TPE-Hs/Hw; (c) TPE-Hs/Lw.
Figure 5
Figure 5
TPE samples prepared by SEBS with various styrene content after Taber abrasion. (a) TPE-Ms/Hw; (b) TPE-Hs/Hw; (c) TPE-Hs/Lw.
Figure 6
Figure 6
Comparison of abrasion scars of TPE with high styrene content. (a,b) are the pictures of TPE-Hs/Hw and TPE-Hs/Lw magnified 40 times respectively, (c,d) are partial magnifications of (a,b) with a magnification of 200 times).
Figure 7
Figure 7
Cross scratching sample of TPE prepared by SEBS with various molecular structures. (a)TPE-HWL; (b) TPE-HWS; (c) TPE-LWS.
Figure 8
Figure 8
TPE samples prepared by SEBS with various molecular structures after Taber abrasion. (a) TPE-HWL; (b) TPE-HWS; (c) TPE-LWS.
Figure 9
Figure 9
40 times magnified photos of samples prepared by SEBS with various molecular structures after Taber-abrasion test. (a) TPE-HWL; (b) TPE-HWS; (c) TPE-LWS.
Figure 10
Figure 10
TPE samples prepared by various lubrication agents and masterbatches after Taber Abrasion. (a) TPE-HG650; (b) TPE-SR100B; (c) TPE-18K; (d) TPE-H/LSi; (e) TPE-PTFE.
Figure 10
Figure 10
TPE samples prepared by various lubrication agents and masterbatches after Taber Abrasion. (a) TPE-HG650; (b) TPE-SR100B; (c) TPE-18K; (d) TPE-H/LSi; (e) TPE-PTFE.
Figure 11
Figure 11
Cross scratch samples of TPE prepared by various lubricating agents and masterbatches. (a) TPE-HG650; (b) TPE-SR100B; (c) TPE-18K; (d) TPE-H/LSi; (e) TPE-PTFE.
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