Molecular crystals and liquid crystals science technology. Section A, Molecular crystals and liquid crystals/Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals · 1995 · 41 citations · 4 references
Natural SciencesChemical EngineeringChemistryCrystal StructurePolymer ChemistrySolid-state ChemistryCrystalline MaterialsCrystallization ProcessesPolymer CharacterizationPolymer CrystallinityPolymer CrystallizationCrystallinityCrystallization BehaviorCrystallization MechanismsSolid-state PolymerizationThermal Motion Analysis
Abstract Microcrystals of two different types of diacetylene monomers, i.e. 4BCMU known for giving a soluble polydiacetylene and 14-8 ADA known as an amphiphilic diacetylene, were prepared and in their solid-state polymerization behaviors were investigated. The polymerization of 4BCMU proceeded quantitatively in the perfect crystalline lattice to give blue-colored polymer crystals. Averaged molecular weight of poly-4BCMU was found to be. proportional to microcrystal size, implying that the solid-state polymerization proceeds from one end to the other end of microcrystals. 14-8 ADA microcrystals gave very stable water dispersion even after polymerization, so that the detailed analysis of polymerization behaviors was possible. Size-dependent spectral change and final conversion found for 14-8 ADA were discussed in terms of strain and thermal motion of the crystal lattice.
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