Aging and Mechanical Properties of NR/BR Blends

Chiu, Hsien‐Tang; Tsai, Peir-An

doi:10.1361/105994906x83448

Cited by 14 publications

(9 citation statements)

References 24 publications

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“…H.T. Chiu et al has reported mechanical properties and thermal properties after aging of a mixture of natural rubber and polybutadiene rubber at different rates [10]. Crosslink density of vulcanized rubber is modified by thermal aging [11].…”

Section: Conceptual Materials Nr/cr Mixturementioning

confidence: 99%

Optimization of the Vulcanization Formula of Pneumatic Rubber Fender (PRF) to Increase Resistance to the Aging Process

Anggaravidya

Habibie

Hidayat

et al. 2021

JITM

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One rubber products, pneumatic rubber fender (PRF), is fully imported, where the raw material is made primarily by synthetic rubber. PRF products have been used in the transport sector as the impact protection of ports and ships. In this study, the mixture between natural and synthetic rubber conducted to determine the Â optimum formula ofÂ mixing rubber for Â the product PRF. Then the PRF-product was subjected to Aging Resistance Test (ART). Physical and mechanical properties of the PRF were analyzed by tensile strength test, elongation at break test, tear resistance test, hardness test, and also some samples of the product of mixing were observed by Fourier Transform Spectroscopy (FTIR), Thermogravimetry Analysis (TGA) and Scanning Electron Microscopy (SEM). The formula used in this study is the ratio of single-NR-100%; combinations of NR-70% and CR-30%; combinations of NR-30% and CR-70%; and the CR-100%. The results showed that the optimum mix formula for the PRF product is NR-70%: CR-30%.

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Section: Conceptual Materials Nr/cr Mixturementioning

confidence: 99%

Optimization of the Vulcanization Formula of Pneumatic Rubber Fender (PRF) to Increase Resistance to the Aging Process

Anggaravidya

Habibie

Hidayat

et al. 2021

JITM

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“…Parameter utama dalam penilaian sifat fisika dan mekanik produk karet meliputi kekerasan dan sifat tarik (kuat tarik dan perpanjangan putus). Tingkatan nilai kekerasan dan sifat tarik ditentukan oleh struktur jalinan dan jenis ikatan silang yang menyusun produk karet tersebut (Zhao et al, 2011 (Chiu & Tsai, 2006). Hasil pengujian ketiga sifat tersebut pada kondisi sebelum dan setelah pengusangan secara berurutan ditampilkan pada Gambar 3, 4, dan 5.…”

Section: Hasil Dan Pembahasanunclassified

“…Namun pada p e r p a d u a n y a n g s a m a d e n g a n bertambahnya proporsi karet sintetik justru menurunkan kuat tarik. Hasil pengujian tersebut sejalan dengan hasil penelitian Chiu & Tsai (2006) yang menyatakan bahwa kuat tarik dan ketahanan sobek perpaduan N R / B R m e n i n g k a t s e i r i n g d e n g a n bertambahnya dosis karet alam. Hasil riset Jovanovic et al (2019) juga menunjukkan bahwa sifat tarik perpaduan karet turun dengan bertambahnya kadar SBR.…”

Section: Hasil Dan Pembahasanunclassified

Komparasi Perpaduan Sir20/SBR Dan Sir 3cv/Br Sebagai Base Elastomer Terhadap Karakteristik Komposit Karet Untuk Telapak Ban Pejal Vulkanisir

Nurjannah

2020

JPK

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Industri ban vulkanisir turut berperan penting dalam menggerakan agroindustri hilir karet di dalam negeri. Telapak ban menjadi bagian utama dalam menentukan mutu ban vulkanisir. Perpaduan karet alam dengan karet sintetik sering kali digunakan dalam merancang formulasi kompon karet untuk pembuatan telapak ban. Penelitian ini mengkaji penggunaan perpaduan karet alam/karet sintetik jenis SIR 20/SBR dan SIR 3CV/BR dalam mempersiapkan komposit karet untuk telapak ban pejal pada roda forklift vulkanisir. Perpaduan karet alam/karet sintetik diatur pada komposisi 75/25; 70/30; dan 65/35, sementara seluruh dosis bahan kimia karet ditetapkan sama pada semua kondisi percobaan. Mutu telapak ban pejal yang diperoleh dievaluasi berdasarkan hasil pengujian parameter kekerasan, kuat tarik, perpanjangan putus, ketahanan sobek, ketahanan retak lentur, dan ketahanan ozon. Hasil karakterisasi sifat fisika dan mekanik komposit karet untuk telapak ban pejal vulkanisir menunjukkan bahwa secara umum perpaduan karet SIR 20/SBR memiliki performa yang lebih baik dibandingkan perpaduan karet SIR 3CV/BR. Rasio SIR 20/SBR sebesar 75/25 dipilih sebagai komposisi teroptimum karena menghasilkan nilai kekerasan (57 Shore A), kuat tarik (23,77 N/mm2), perpanjangan putus (570%) yang tertinggi. Meskipun demikian nilai ketahanan sobek (29,7 kN/m) dan ketahan retak lentur (80 kCs) pada perpaduan karet tersebut masih perlu dtingkatkan.

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“…Zlata Harnjak-Murgie's group evaluated the change in network density of NR mixtures with various accelerators during heat aging [7]. e relationship between heat aging and rubber/rubber blends network was investigated by various methods [3,[8][9][10]. Such relationship may also be used for the prediction of rubber behavior while aging conditions were changed [11].…”

Section: Introductionmentioning

confidence: 99%

Detailed Study on the Mechanical Properties and Activation Energy of Natural Rubber/Chloroprene Rubber Blends during Aging Processes

Trong

Viet

Linh

et al. 2020

Journal of Chemistry

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Selection of a suitable thermal aging process could render desirable mechanical properties of the rubbers or blended rubbers. In this work, the effect of the aging processes on the mechanical properties and activation energies of natural rubbers (NR) and NR/chloroprene rubbers (CR) blends with low CR contents (5–10%) was investigated. Three aging processes including heat aging (at 110°C for 22 hours), mechanical aging (under dynamic loading to 140% strain for 16000 cycles), and complex aging (heat and mechanical aging) were studied. The results revealed that the compatibility of CR in natural rubber matrix had a significant effect on the dynamic properties of the blended rubber and negligible effect on the static properties. The changes in activation energies of the blended rubber during aging processes were calculated using Arrhenius relation. The calculated changes (ΔUc, ΔUd, and ΔUT) in activation energies were consistent with the results of mechanical properties of the blended rubber. Interestingly, the change in activation energies using complex aging conditions (ΔUc) was mostly equal to the total changes in activation energies calculated separately from heat aging (ΔUT) and mechanical aging (ΔUd) conditions. This indicates that, in complex aging conditions, the heat and dynamic loading factors act independently on the properties of the blended rubber.

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Aging and Mechanical Properties of NR/BR Blends

Cited by 14 publications

References 24 publications

Optimization of the Vulcanization Formula of Pneumatic Rubber Fender (PRF) to Increase Resistance to the Aging Process

Optimization of the Vulcanization Formula of Pneumatic Rubber Fender (PRF) to Increase Resistance to the Aging Process

Komparasi Perpaduan Sir20/SBR Dan Sir 3cv/Br Sebagai Base Elastomer Terhadap Karakteristik Komposit Karet Untuk Telapak Ban Pejal Vulkanisir

Detailed Study on the Mechanical Properties and Activation Energy of Natural Rubber/Chloroprene Rubber Blends during Aging Processes

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