Miscibility and peel strength of acrylic pressure‐sensitive adhesives: Acrylic copolymer–tackifier resin systems

Abstract

SYNOPSISInfluence of miscibility between the components in acrylic pressure-sensitive adhesives upon their peel strength P as a function of temperature has been studied. In case of miscible blend systems, incorporation of tackifier resins into the pressure-sensitive adhesive systems results in the modification of the bulk properties, including T,, and a plot of P against AT gives a smooth master curve, where AT is defined as the difference between the temperature of peel test and T, of the blend. However, in case of immiscible blends where two phases exist in the system, no master curve can be obtained, and P of an acrylic copolymer decreases as the tackifier content increases. In this case, physical properties and adhesive performance will be governed by a matrix phase, and a dispersed phase will act as a filler. 0 1995 John Wiley & Sons, Inc.

Effects of miscibility on peel strength of natural-rubber-based pressure-sensitive adhesives

“…The peak shift toward a lower velocity with increasing tackifier content is the characteristic of all the miscible PSAs, which is attributable to the elevation in Tg. 10 The blends containing 70% or more of ESCOREZ 5320 had no stickiness. The fracture modes of NR-ESCOREZ 5320 PSAs is shown in Figure 7.…”

“…Therefore, it is considered that the tackifier resin acts as a filler in the immiscible PSAs and that, essentially, does not change the mechanical properties of the matrix phase. 10,13 …”

Miscibility and fracture energy of probe tack for acrylic pressure-sensitive adhesives: acrylic copolymer/tackifier resin systems

“…1 T g of strength 9 at around the concentration at which the matrix phase was elevated as the tackifier resin content increased up to 10-20%, whereas the phase structure changed. …”

Synthesis and Application of Sorbic Acid Grafted Hydrogenated Dicyclopentadiene Hydrocarbon Resin

“…The hydrocarbon resins develop the mobility of base polymer at taping process as a diluent, as well as improve the peel strength at peeling process. Many researchers [1][2][3][4][5][6][7][8][9] and we [10,11] investigated the mechanism of tackiness development by the addition of HCRs. Pressure-sensitive adhesives (PSA) are used for many different applications in the form of tapes, labels, decals, medical products, and others.…”

“…Therefore, it can be said that most of the PSA actually used are blends of long-chain molecules and bulky oligomeric materials. The most important practical performance of PSA are adhesion (peel adhesion strength), tack (probe tack, ball tack, and loop tack), and holding power (shear adhesion strength), and because they are all closely related to deformation and failure of the materials, the measured values are dependent not only on temperature but also on rate of deformation [12]. There are three types of HCR which are C5, C9, and hydrogenated dicyclopentadiene (DCPD).…”