Abstract

The poly(ethylene glycol) phenyl ether acrylate (PEPA) monomers are graft-polymerized onto polyurethane (PU), and its impacts on water compatibility, chain packing, tensile stress, and shape recovery capability are evaluated. The grafted poly(PEPA)s slightly increase the degree of cross-linking due to the linking between themselves. The water compatibility (water contact angle, water swelling, and water vapor permeation) are affected slightly by the grafted poly(PEPA). The grafted poly(PEPA) does not notably influence the melting of soft segments, but the crystallization of soft segments is reduced significantly. The grafted poly(PEPA) does not significantly affect the glass transition of soft segments. The grafted poly(PEPA) notably increases the breaking tensile stress with the increase in PEPA content, but the breaking tensile strain decreases slowly with increasing PEPA content. The grafted poly(PEPA) rapidly improves the shape recovery capability of PU and slowly decreases the shape retention capability with the increase in PEPA content. Therefore, the grafted poly(PEPA) slightly modifies the water compatibility but notably enhances the breaking tensile stress and shape recovery capability of PU.

中文翻译：

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聚（乙二醇）苯醚丙烯酸酯在聚氨酯上的接枝聚合及其对机械性能和链堆积的影响

摘要

将聚（乙二醇）苯基醚丙烯酸酯（PEPA）单体接枝聚合到聚氨酯（PU）上，评估其对水相容性，链堆积，拉伸应力和形状恢复能力的影响。由于它们之间的连接，接枝的聚（PEPA）稍微增加了交联度。接枝的聚（PEPA）对水的相容性（水接触角，水溶胀和水蒸气渗透）有轻微影响。接枝的聚（PEPA）不会显着影响软链段的熔化，但会大大减少软链段的结晶。接枝的聚（PEPA）不会显着影响软链段的玻璃化转变。随着PEPA含量的增加，接枝的聚（PEPA）明显增加了断裂拉伸应力，但断裂拉伸应变随PEPA含量的增加而缓慢降低。随着PEPA含量的增加，接枝的聚（PEPA）迅速提高了PU的形状恢复能力，并缓慢降低了形状保持能力。因此，接枝的聚（PEPA）稍微改变了水的相容性，但显着增强了PU的断裂拉伸应力和形状恢复能力。