Abstract
AbstractXanthides of starches with low (0,28%) and high (55, 68, and 82%) amylose content incorporated into vulcanizates of styrene‐butadiene (SBR) latex solids and compounded with or without resorcinol‐formaldehyde in combination with γ‐aminopropyltriethoxysilane show significant differences in mechanical properties in the dry state and after immersion in water. Although the rate of water absorption is slower and the percentage deterioration of modulus, tensile strength, and set at break is lower for the high‐amylose starch xanthide filled vulcanizates, the actual values for dry modulus and tensile strength are inferior to those for the low amylose starches. When used to replace carbon black filler, favorable dry mechanical properties are obtained with 28 and 55% amylose xanthides.
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