Synthesis and properties of hydrogenated natural rubber

Inoue, Shin‐ichi; Nishio, Tomohiro

doi:10.1002/app.25158

Cited by 27 publications

(31 citation statements)

References 19 publications

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“…Therefore, the surface cracking (after 24 h exposure) was not observed for the HSNR (64.5% hydrogenation)/NR blends at all blend ratios. However, Inoue and Nishio [31] earlier reported that the surface cracking on 100% HNR was not observed.…”

Section: Ozone Resistance Of Hsnr/nr Vulcanizatesmentioning

confidence: 87%

Improving thermal and ozone stability of skim natural rubber by diimide reduction

Simma

Rempel

Prasassarakich

2009

Polymer Degradation and Stability

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Section: Ozone Resistance Of Hsnr/nr Vulcanizatesmentioning

confidence: 87%

Improving thermal and ozone stability of skim natural rubber by diimide reduction

Simma

Rempel

Prasassarakich

2009

Polymer Degradation and Stability

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“…Sehingga melalui metode ini diharapkan karet alam mampu mempertahankan sifat mekaniknya yang unggul dan menjadi lebih tahan terhadap proses oksidasi termal (Piya-areetham, et al, 2013b). Karet alam terhidrogensi memiliki struktur rantai molekul menyerupai karet EPDM (Inoue & Nishio, 2007).…”

Section: Pendahuluanunclassified

Katalitik transfer hidrogenasi lateks karet alam dengan senyawa diimida pada skala semi pilot

Puspitasari

Cifriadi

2017

MKKP

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Improvement on thermal oxidative resistance of natural rubber can strenghten its application especially on the ABSTRAKPeningkatan ketahanan oksidasi termal karet alam dapat memperluas aplikasinya terutama untuk pembuatan produk karet yang diaplikasikan di luar ruangan. Karet alam tahan oksidasi termal dapat dibuat secara hidrogenasi menggunakan senyawa diimida yang dihasilkan secara insitu dari oksidasi hidrasina hidrat oleh hidrogen peroksida. Pada riset ini dipelajari kondisi optimum reaksi hidrogenasi lateks karet alam pada skala semi pilot berkapasitas 2,5 kg lateks pekat/batch berkatalis asam borat. Sistem kestabilan koloid lateks selama reaksi dipertahankan dengan penambahan kombinasi surfaktan anionik/nonionik. Variabel yang ditetapkan dalam reaksi meliputi suhu (40 dan 50 o C) dan rasio konsentrasi hidrasina hidrat (40 dan 42,5 phr) terhadap hidrogen peroksida (30 dan 35 phr). Berdasarkan hasil analisis kualitatif dan kuantitatif terhadap karet terhidrogenasi diketahui bahwa kondisi optimal reaksi hidrogenasi lateks karet alam dicapai pada suhu 50 o C dengan rasio konsentrasi hidrasina hidrat/hidrogen peroksida sebesar 42,5/35 phr. Pada kondisi reaksi tersebut, karet terhidrogenasi memiliki sifat ketahanan oksidasi termal yang lebih baik dibandingkan karet alam murni yang ditunjukkan dengan wujud bertekstur kokoh, keras, dan tidak lengket, indeks ketahanan plastisitas tertinggi sebesar 38,5% dan derajat hidrogenasi sebesar 60,48%. Karet hidrogenasi tersebut juga memiliki kadar gel yang rendah sebesar 56,98%.Kata kunci: Diimida, karet alam, ketahanan oksidasi termal, hidrogenasi.

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“…[11][12][13] Although the kinetics of NR hydrogenation and thermal properties of hydrogenated NR (HNR) have been investigated, there are few literature reports on the measurement of any technological properties of HNR vulcanizates and rubber blends containing HNR. Inoue and Nishio 14 studied NR hydrogenation catalyzed by RhCl(PPh 3 ) 3 at 70-80 C and 100% hydrogenation was achieved within 96 h. For their HNR materials, the mechanical properties of the HNR vulcanizates after aging were higher than NR and EPDM vulcanizates. In addition, the ozone and abrasion resistances of HNR vulcanizates were also higher than those of NR and EPDM.…”

Section: Introductionmentioning

confidence: 97%

Hydrogenated natural rubber blends: Aspect on thermal stability and oxidative behavior

Hinchiranan

Lertweerasirikun

Poonsawad

et al. 2009

J of Applied Polymer Sci

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Hydrogenated natural rubber (HNR) prepared from natural rubber (NR) is a new sustainable elastomer with excellent thermal properties. This study reports on the effect of vulcanization system and blend ratio on the thermal and oxidative resistance of HNR/NR vulcanizates. The various HNR/NR ratios vulcanized by peroxide and sulfur donor system exhibited the highest retention of tensile strength after thermal aging due to the formation of zinc-dimethyldithiocarbamate (ZDMDC) which is an efficient antioxidant. The results from thermogravimetric analysis (TGA) indicated that the saturated structure of HNR had higher decomposition temperature and activation energy to enhance the thermal stability of HNR/NR vulcanizates. The initial and maximum decomposition temperatures of NR and HNR phases in vulcanizates were not affected by rubber blend ratio. This suggests that the decomposition pattern of HNR has no influence on another constituent. The increase in HNR content in the blends could retard the ozonolysis resulting in the surface cracking attacked by ozone.

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Synthesis and properties of hydrogenated natural rubber

Cited by 27 publications

References 19 publications

Improving thermal and ozone stability of skim natural rubber by diimide reduction

Improving thermal and ozone stability of skim natural rubber by diimide reduction

Katalitik transfer hidrogenasi lateks karet alam dengan senyawa diimida pada skala semi pilot

Hydrogenated natural rubber blends: Aspect on thermal stability and oxidative behavior

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