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Studies of thermal, mechanical properties, and kinetic cure reaction of carboxyl‐terminated polybutadiene acrylonitrile liquid rubber with diepoxy octane
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-09-17 , DOI: 10.1002/app.49932
Yahya Ebrahimabadi 1 , Mohammad Mehrshad 2 , Masoud Mokhtary 1 , Mahdi Abdollahi 3
Affiliation  

Epoxy resins, despite their unique properties, have limitations in many applications due to their low fracture toughness. One of the most effective methods to overcome this limitation is to use toughening agents, such as carboxyl terminated poly butadiene‐acrylonitrile (CTBN) in the epoxy matrix. CTBN can react with various compounds, such as epoxies. In this study, we investigated the severity of CTBN sedimentation with di epoxy octane (DEO) in the presence basis catalysts. The studied of the physical properties of the synthesized copolymer in the presence of pyridine compared to other catalysts increases mechanical properties (248.43% elongation, 0.63 MPa strength, and 32 hardness with Shore A) and decreases the glass transition temperature (−45.1) of the copolymer. Investigated the cure kinetics of the CTBN‐DEO reaction was in the presence of pyridine using a nonisothermal technique of differential scanning calorimetry, and the curing kinetic parameters, such as activation energy (Ea), pre‐exponential factor (A), and rate constant (k), were calculated by different kinetic methods. The obtained curing kinetic values with different kinetic methods are well‐matched, the Ea values are in the range of 91.3–97.1 kJ.mol−1 and the A values are in the range of 0.48 × 1011–1.51 × 1011 S−1.

中文翻译:

羧基封端的聚丁二烯丙烯腈液态橡胶与二环氧辛烷的热,力学性能和动力学固化反应的研究

环氧树脂尽管具有独特的性能,但由于其低的断裂韧性而在许多应用中都有局限性。克服此限制的最有效方法之一是在环氧树脂基质中使用增韧剂,例如羧基封端的聚丁二烯-丙烯腈(CTBN)。CTBN可以与各种化合物(例如环氧树脂)反应。在这项研究中,我们研究了在存在基础催化剂下用二环氧辛烷(DEO)沉积CTBN的严重性。与其他催化剂相比,在吡啶存在下对合成共聚物的物理性能进行的研究提高了机械性能(在肖氏A下具有248.43%的伸长率,0.63 MPa的强度和32的硬度),并降低了其的玻璃化转变温度(-45.1)。共聚物。E a),指数前因子(A)和速率常数(k)是通过不同的动力学方法计算的。用不同的动力学的方法将所得到的固化动力学值是公匹配,则Ë一个值在91.3-97.1 kJ.mol的范围-1值在0.48×10的范围内11 -1.51×10 11 小号-1
更新日期:2020-11-25
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