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首页> 外文期刊>Journal of Applied Polymer Science >Toughened Interpenetrating Polymer Network Materials Based on Unsaturated Polyester and Epoxy
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Toughened Interpenetrating Polymer Network Materials Based on Unsaturated Polyester and Epoxy

机译：基于不饱和聚酯和环氧树脂的增韧互穿聚合物网络材料

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摘要

Simultaneous interpenetrating polymer networks (IPNs) based on epoxy (diglycidyl ether of bisphenol A) and unsaturated polyester (UP) were prepared by using m-xylenediamine and benzoyl peroxide as curing agents. A single glass transition temperature for each IPN was observed with differential scanning calorimetry, which suggests good compatibility of epoxy and UP. This compatibility was further confirmed by the single damping peak of the rheometric dynamic spectroscopy. Curing behaviors were studied with dynamic differential scanning calorimetry, and the curing rates were measured with a Brookfield RTV viscometer. It was noted that an interlock between the two growing networks did exist and led to a retarded vicosity icnrease. However, the hydroxyl end groups in UP catalyzed the curing reaction of epoxy; in some IPNs where the hydroxyl concentraion was high enough, such catalytic effect predominated the network interlock effect, leading to fast viscosity increases. In addition, the entanglement of the two interlocked networks played an important role in cracking enregy absorption and reflected in a toughness improvement.
机译：以间二甲苯二胺和过氧化苯甲酰为固化剂，制备了基于环氧树脂（双酚A的二缩水甘油醚）和不饱和聚酯（UP）的互穿聚合物网络（IPN）。用差示扫描量热法观察到每个IPN的单一玻璃化转变温度，这表明环氧树脂和UP具有良好的相容性。流变动态光谱法的单个阻尼峰进一步证实了这种相容性。用动态差示扫描量热法研究固化行为，并用Brookfield RTV粘度计测量固化速率。值得注意的是，两个生长网络之间确实存在连锁关系，并导致黏滞性胞嘧啶核糖核酸酶的阻滞。但是，UP中的羟基端基催化了环氧树脂的固化反应。在某些羟基浓度足够高的IPN中，这种催化作用优先于网络互锁效应，导致粘度快速增加。另外，两个互锁网络的缠结在裂纹吸收吸收中起重要作用，并反映出韧性的提高。

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