Hot-melt adhesive properties of EVA/aromatic hydrocarbon resin blend
Hot-melt adhesive properties of EVA/aromatic hydrocarbon resin blend
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DOI：
10.1016/s0143-7496(03)00069-1
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发表时间：
2003-10-01
影响因子：
3.4
通讯作者：
Kim, HJ
中科院分区：
文献类型：
--
作者：
Park, YJ;Kim, HJ
将一系列乙烯-醋酸乙烯酯共聚物（EVA）与芳烃树脂共混制成热熔胶。测定了伊娃/芳烃树脂体系的玻璃化转变温度、粘弹性能、熔体粘度、结晶度和粘接性能随芳烃树脂软化点、两组分共混比和EVA中醋酸乙烯酯含量的变化。大多数共混物的玻璃化转变温度约为-25 ℃，熔融峰在30 ℃至100 ℃之间。随着芳烃树脂软化点的升高，损耗模量峰值增大。共混物的熔体粘度随温度的升高而降低。熔体粘度随软化点的增加而增加，随芳烃树脂和醋酸乙烯酯含量的增加而降低。在相同共混比的情况下，提高芳烃树脂的软化点，结晶度增加，而芳烃树脂的加入降低结晶度。此外，增加乙酸乙烯酯含量降低共混物的结晶度，由于乙烯的结晶区域的减少。剪切强度随芳烃树脂软化点的增加而增加。剪切强度也随着芳烃树脂浓度的增加而增加，直到达到最大值。(C)2003 Elsevier Ltd.保留所有权利。
A series of ethylene vinyl acetate copolymers (EVAs) were blended with aromatic hydrocarbon resins for use as hot-melt adhesives. The glass transition temperature, viscoelastic properties, melt viscosity, crystallinity and adhesion properties of the EVA/aromatic hydrocarbon resin system were determined as a function of the softening point of the aromatic hydrocarbon resin, the blend ratio of the two components and the vinyl acetate content of EVAs. Most blends showed a glass transition temperature at about -25degreesC and a melting peak between 30degreesC and 100degreesC. The peaks of loss modulus increased with increasing softening point of the aromatic hydrocarbon resin. The melt viscosity of the blends decreased with increasing temperature. Also, the melt viscosity increased with increasing softening point, but decreased with increasing aromatic hydrocarbon resin and vinyl acetate content. Increasing the softening point of the aromatic hydrocarbon resins, in cases of the same blend ratio, increased the crystallinity, while the addition of aromatic hydrocarbon resin decreased the crystallinity. Also, increasing the vinyl acetate content decreased the crystallinity of the blend, due to a decrease in the crystalline region of ethylene. The lap-shear strength increased with increasing softening point of the aromatic hydrocarbon resin. The lap-shear strength also increased with increasing concentration of aromatic hydrocarbon resin, until it reaches a maximum value. (C) 2003 Elsevier Ltd. All rights reserved.