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首页> 外文期刊>Journal of Applied Polymer Science >Sequential interpenetrating polymer networks of novolac resin and poly(2-ethyl hexyl acrylate)-thermal, mechanical, and morphological study
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Sequential interpenetrating polymer networks of novolac resin and poly(2-ethyl hexyl acrylate)-thermal, mechanical, and morphological study

机译：酚醛清漆树脂和聚（丙烯酸2-乙基己酯）的顺序互穿聚合物网络-热力学，形态学研究

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摘要

Interpenetrating polymer networks (IPN) of novolac/poly (2- ethyl hexyl acrylate) (PEHA) have been prepared via in situ sequential technique of IPN formation. Full and semi-IPNs were prepared with different blend ratios (w/w) e.g., 90: 10, 80: 20, and 70: 30 in which the major constituent was novolac resin. A gradual decrease in specific gravity and hardness values was observed with increase in PEHA incorporation. A steady decrease in crosslink density with increase in PEHA fraction in the IPNs was quite evident. The IPNs were characterized with respect to their mechanical properties, e.g., ultimate tensile strength, percentage elongation at break, modulus, and toughness. Thermal behavior was studied by differential scanning calorimetry and thermogravimetric analysis. A plasticizing influence of PEHA on the rigid, brittle, and hard matrix of crosslinked phenolic resin is evidenced from the mechanical and thermal properties. The two-phase surface morphology is revealed by scanning electron microscope.
机译：酚醛清漆/聚（丙烯酸2-乙基己酯）（PEHA）的互穿聚合物网络（IPN）已通过IPN形成的原位顺序技术制备。以不同的混合比（w / w）例如90：10、80：20和70:30制备完全和半IPN，其中主要成分是酚醛清漆树脂。随着PEHA掺入量的增加，比重和硬度值逐渐降低。随着IPN中PEHA分数的增加，交联密度逐渐降低。 IPN的机械性能如极限拉伸强度，断裂伸长率，模量和韧性都经过了表征。通过差示扫描量热法和热重分析法研究了热行为。从机械和热性能可以证明PEHA对交联酚醛树脂的刚性，脆性和硬质基质的增塑作用。通过扫描电子显微镜揭示两相表面形态。

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