Thermally dissociable pseudo-polyrotaxane as a supramolecular shrinkage suppressor for epoxy-amine curing system

Journal of Polymer Science, Part A: Polymer Chemistry

Volumn 46, Issue 6, 2008, Pages 2305-2308

  Isobe, Yukio ^a   Sudo, Atsushi ^a   Endo, Takeshi ^a  

^a KINKI UNIVERSITY   (Japan)

Author keywords

Curing of polymers; Density; Host guest systems; Polyrotaxanes; Supramolecular structures

Indexed keywords

AMINES; CYCLODEXTRINS; MONOMERS; POLYPROPYLENES; SUPRAMOLECULAR CHEMISTRY; THERMOSETS;

EPOXY MONOMERS; HOST-GUEST SYSTEMS; POLY(PROPYLENE GLYCOL); SUPRAMOLECULAR STRUCTURES; THERMAL DISSOCIATION;

EPOXY RESINS;

EID: 40549128672     PISSN: 0887624X     EISSN: 10990518     Source Type: Journal    
DOI: 10.1002/pola.22546     Document Type: Article

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23. Typical procedure: 1a (7.86 g, 19.65 mmol) was mixed with 2a (1.28 g, 0.35 mmol) and was stirred for 1 h at ambient temperature. The resulting homogeneous mixture was added to Bis A-DGE (13.62 g, 40.00 mmol). The resulting mixture was degassed under vacuum for 1 h at ambient temperature. During this formulation process, no significant reaction proceeded (checked by 1H NMR). Density of the mixture before curing reaction was measured by a gas-pyenometer (Micromeritics, model AccuPyc1330) to be 1.107. Then, the mixture was transferred into a reaction mold made by silicone rubber, and was heated at 120°C for 1 h to obtain the corresponding cured material as a white turbid solid. The density of the cured material was measured by the gas pycnometer, which was 1.150. From the densities, the corresponding volume shrinkage degree was calculated to be 3.7%.