Rheology modification of PVC plastisols with poly(butylene terephthalate)-b-poly(tetramethylene glycol)

A few percent of poly(butylene)-b-poly(tetramethylene glycol) was able to turn a liquid plasticizer into a gel, and thus imparted yield stresses to the fluid. When the plasticizer contained as little as 2.5 wt % of the block copolymer, sag free plastisols were obtained. A reduction in tensile strength was found for the modified plastisols, while the elongation was not affected. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 66: 749–753, 1997