Relation between phase structure and peel adhesion of poly(styrene-isoprene-styrene) triblock copolymer/tackifier blend system

Relation between phase structure and peel adhesion of poly(styrene-isoprene-styrene) triblock copolymer/tackifier blend system

The effect of tackifier on the adhesive properties of a model pressure-sensitive adhesive tape was investigated. For this purpose, a model system consisting of poly(styrene-isoprene-styrene) triblock copolymer as the base polymer and a typical aliphatic petroleum resin as the tackifier was prepared....

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Bibliographic Details
Published in:Journal of adhesion science and technology Vol. 19; no. 16; pp. 1445 - 1457
Main Authors: Sasaki, Mariko, Nakamura, Yoshinobu, Fujita, Kazuya, Kinugawa, Yoshihito, Iida, Takeo, Urahama, Yoshiaki
Format: Journal Article
Language:English
Published: Leiden Taylor & Francis Group 01-01-2005
Brill
Subjects:
Applied sciences
Exact sciences and technology
PHASE STRUCTURE
Physical properties
POLY(STYRENE-ISOPRENE-STYRENE) TRIBLOCK COPOLYMER
Polymer industry, paints, wood
PRESSURE-SENSITIVE ADHESIVE
Properties and testing
PULSE NMR
SIS
Surface properties
TACKIFIER
Technology of polymers
Tackifying resin
Adhesivity
Polymer blends
Thermoplastic rubber
Pressure-sensitive adhesive
Experimental study
Heterogeneous mixture
Structure composition relationship
tackifier
Triblock copolymer
poly(styrene-isoprene-styrene) triblock copolymer
Domain structure
Morphology
Surface properties
Property structure relationship
pulse NMR
SIS
phase structure
Pressure sensitive adhesive
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Summary:The effect of tackifier on the adhesive properties of a model pressure-sensitive adhesive tape was investigated. For this purpose, a model system consisting of poly(styrene-isoprene-styrene) triblock copolymer as the base polymer and a typical aliphatic petroleum resin as the tackifier was prepared. The tackifier content ranged from 10 to 60 wt%. The tackifier used has a good compatibility with polyisoprene, whereas it has a poor compatibility with polystyrene. The 180° peel adhesion was measured. The peel adhesion increased with the tackifier content, while the degree of increase became more significant above 40 wt%. The pressure sensitivity appeared obviously and the maximum peel adhesion was obtained without heating above 40 wt%. The phase structure was determined using pulse 1 H-NMR, transmission electron microscopy and dynamic mechanical analysis. A phase structure in which spherical polystyrene domains with a mean size of about 20 nm were dispersed in the polyisoprene continuous phase was observed. It was found that the tackifier-rich phase of the order of nanometers in size was formed in the polyisoprene matrix and the concentration increased with the tackifier content. The tackifier-rich phase seemed to develop the cohesive strength and, thus, it increased the peel adhesion.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0169-4243
1568-5616
DOI:10.1163/156856105774805859