1 / 4

Results on IR and SBR samples

Results on IR and SBR samples. To confirm our interpretation of the stress-optical diagrams, additional experiments were conducted on the samples prepared from synthetic cis-1,4-polyisoprene (IR) and copolymer of styrene and butadiene (SBR). The following results support our interpretation.

amelia
Download Presentation

Results on IR and SBR samples

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Results on IR and SBR samples To confirm our interpretation of the stress-optical diagrams, additional experiments were conducted on the samples prepared from synthetic cis-1,4-polyisoprene (IR) and copolymer of styrene and butadiene (SBR). The following results support our interpretation.

  2. Recipes of rubber samples Fast crystallization aNatural Rubber, RSS #1 from Malaysia bN-cyclohexyl-2-benzothiazole sulfenamide, curing temperature with sulfur 140℃ Slow crystallization aSynthetic cis-1,4-polyisoprene, IR2200 from JSR bN-cyclohexyl-2-benzothiazole sulfenamide, curing temperature with sulfur 140℃ Do not crystallize aCopolymer of styrene and butadiene, SBR1502 bN-cyclohexyl-2-benzothiazole sulfenamide, curing temperature with sulfur 150℃

  3. Stress-optical diagrams of SBR fracture Fast expansion (1000mm/min) and subsequent holding indicated in the legend The “hooks” sloped down to the left because of the absence of crystallinity. Slow expansion (10mm/min) C = 3.2×10-9 Pa-1 for SBR1502 Strain ratio at fracture: ca. 4.1 C. A. Berglund, J. Polym. Sci., Polym. Phy. Ed., 15, 2037 (1977).

  4. Slow crystallization of IR fracture Because of the slower crystallization rate of IR, the “hook” is smaller than those of NR samples. The rate of stress relaxation of the IR sample is also slower.

More Related