Oxidative degradation of EPDM rubber using phase transferred permanganate as oxidant
Oxidative degradation of EPDM rubber using phase transferred permanganate as oxidant
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相转移高锰酸盐为氧化剂氧化降解三元乙丙橡胶
DOI：
10.1016/0141-3910(94)90071-x
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发表时间：
1994
影响因子：
5.9
通讯作者：
A. Sen
中科院分区：
文献类型：
--
作者：
J. Konar;G. Samanta;B. N. Avasthi;A. Sen
以相转移高锰酸盐为氧化剂，对含乙烯单位数不同的乙丙橡胶进行了氧化降解。用红外光谱对氧化产物进行了表征。用热重法研究了三元乙丙橡胶在空气中的降解行为。对EPDM和氧化EPDM的红外光谱进行比较，证实了在1735 cm−1附近由于拉伸振动出现新的峰，这可能是由羧基、酯或酮基引起的。非水酸碱滴定法证实了氧化EPDM中羧基的存在。差示扫描量热法测定的氧化降解起始温度表明，atonset值随着氧化而显著降低。玻璃化转变温度（Tg）的测量表明，由于氧化，Tg升高。扫描电子显微镜（SEM）观察表明，由于氧化，表面变得粗糙。
Oxidative degradation of ethylene propylene diene (EPDM) rubber containing varying amounts of ethylene units has been carried out using phase-transferred permanganate as oxidant. The oxidised products have been characterised by IR spectroscopy. The degradation behaviour of EPDM rubbers has been studied by thermogravimetry in air. A comparison of the IR spectra of EPDM and oxidised EPDM confirms the appearance of new peaks near 1735 cm−1due to the stretching vibration, which may arise from carboxyl, ester or ketone groups. Nonaqueous acid-base titration confirms the presence of carboxyl groups in oxidised EPDM. The onset temperature of oxidative degradation as determined by differential scanning calorimetry shows thatTonsetvalues decrease significantly on oxidation. The measurement of glass transition temperature (Tg) suggests an increase inTgdue to oxidation. Scanning electron microscopy (SEM) observations indicate surface roughening due to oxidation.