[논문]Dynamically Vulcanized PP/EPDM Blends:Effects of Different Types of Peroxides on the Properties

Naskar, K.; Noordermeer, J.W.M.

Dynamically Vulcanized PP/EPDM Blends:Effects of Different Types of Peroxides on the Properties 원문보기

엘라스토머 = Elastomer, v.38 no.2, 2003년, pp.167 - 174

Naskar, K. (Dutch Polymer institute (DPI) University of Twente, Faculty of Chemical Technology, Dept. of Rubber Technology) , Noordermeer, J.W.M. (Dutch Polymer institute (DPI) University of Twente, Faculty of Chemical Technology, Dept. of Rubber Technology)

Abstract ▼ AI-Helper

Thermoplastic vulcanizates (TPV) or dynamic vulcanizates are thermoplastic elastomers produced by simultaneous mixing and crosslinking of a rubber and a thermoplastic. The objective of the present work is to investigate the effects of different types of peroxides as curing agents on the properties of PP/EPDM TPVs. The mechanical properties change significantly with the chemical nature of the peroxides and the extent of crosslinking at a fixed PP/EPDM blend ratio. The tensile strength of the TPVs obtained with the various peroxides can be related to the solubility parameters of the polymers and of the peroxides. The Young's modulus of the peroxide-cured TPVs can be correlated with the delta torque values of equivalent thermoset EPDM vulcanizates, corresponding to the crosslinking efficiencies of the peroxides.

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문제 정의

, activated sulfur, co-agent assisted peroxides, activated phenol-formaldehyde resins (resol), platinum catalyzed hydrosiloxane, vinyltrialkoxysilane/ moisture, bisazide and catalyzed quinonedioxime etc. The objective of the present work is to widen the possible use of peroxides in the production of TPVs. The main advantages of peroxide crosslinking in comparison with e.
^{11, 12} There is a need for a proper peroxide in combination with a suitable co-agent for PP/EPDM TPVs to diminish the extent of PP degradation and improve the degree of EPDM crosslinking. The objective of this work is to investigate the effect of different types of peroxides on the properties of PP/EPDM TPVs.
At the temperature where the addition of the peroxide is made, the solubility parameter of the latter will be of great importance for which of the two phases it is most preferred: the EPDM-phase to perform crosslinking or the PP-phase, where degradation of the PP will mainly occur. Therefore, it is an important question with the series of peroxides investigated in this paper to obtain an impression about the distribution of all peroxides over the two phases.

제안 방법

However, as it is very difficult to measure the solubility parameters of the different components at the mixing temperature, an attempt was made to calculate those. Solubility parameter can be calculated using group contribution methods, which are based on additive contributions of different functional groups.
Tensile tests were carried out on dumb-bell shaped specimens (Type 2) using a Zwick Tensile Testing machine Z020 at a constant cross-head speed of 500 mm / min (ISO 37). The Young's modulus was determined from the initial 이ope of the stress-strain curve (0.

대상 데이터

Ethylidene norbomene (ENB)-containing EPDM rubber, which includes 50 wt % of paraffinic oil, was obtained from DSM Elastomers, the Netherlands. The EPDM contains 63 wt % of ethylene and 4.
3 g /10 min. Several types of peroxides, obtained from Akzo Nobel, the Netherlands, were employed for this study. The commercial names and chemical names / structures of the five peroxides under investigation are given in Table 1.
Triallyl cyanu-rate, TAC (50%) (Perkalink^® 300) was also obtained from Akzo Nobel. Two stabilizers, Irganox^® 1076 and Irgafos^® 168 were obtained from Ciba Geigy.

참고문헌 (18)

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