Both kinds and amounts of polymeric materials have developed dramatically, applications are also extensive, becoming indispensable for everyday life.A high-performance polymer blends and composes two or more kinds of polymers having different properties in the case where it is technically difficult and costly to newly develop.This is one of the high-rate techniques for enhancing the performance and performance of polymer materials, and is widely used industrially.Therefore, in order to obtain the required physical properties, molecular structure analysis including elucidation of interaction between polymers is important.
The properties and physical properties of the material obtained by polymer blending are greatly affected by the mutual solubility between the polymers and the interaction between the polymers affects the compatibility.Depending on the difference in interaction, it can be divided into polymer electrolyte complex, hydrogen bonding complex, stereo complex and so on.Therefore, in order to obtain necessary physical properties, it is important to accurately read many data on the blend and interpret the structure, compatibility and the like.However, polymer blends are often heterogeneous amorphous solids and few applicable spectroscopy.For such polymer blends, solid high resolution nuclear magnetic resonance (NMR) method is particularly effective. Solid high-resolution 13 C NMR method has the advantage that each polymer can be investigated individually because polymer residues can be distinguished and observed.In addition, information on compatibility and molecular mobility can be obtained from parameters obtained by measuring various magnetic relaxation times.
Currently, the following has been reported. When PAAm aqueous solution is bubbled with CO 2, NH 2 becomes NH 3 + and carbamate (NHCOO -) in the initial stage, and ion complex is formed between PAAm and opaque.Further, when bubbling with CO 2, a bicarbonate ion (HCO 3 -) is formed, becomes a counter ion with NH 3 +, the ion complex is eliminated, and becomes colorless and transparent.After that, when N 2 is bubbled at room temperature, HCO 3 - is removed.
In this study, we aim to develop new high-performance polymers, a composite of PAAm and PAANa (PAAm · CO 2 / PAANa) with CO 2 bubbling, PAAm and PAANa complex (PAAm · CO 2 / PAANa) which bubbled N 2 after CO 2 bubbling (CO 2 + N 2) / PAANa) was measured using solid state NMR, IR and structural analysis was carried out.
Conclusion, It is considered that the complex was formed because NH 3 + of PAAm protonated by bubbling and COO - of PAANa formed ion complex by strong electrostatic interaction.From the IR, in addition to the peak of COO- around 1400 cm -1, it has a peak of NH 3 + near 1635 cm -1, and there is a peak of COO- ionically complexed by waveform separation in the carbonyl region of NMR Therefore, it is considered that an ion complex is formed.From the comparison of the waveform analysis of the carbamate peak of PAAm · CO 2 / PAANa complex and PAAm · (CO 2 + N 2) / PAANa complex, removal of bicarbonate ion (HCO 3 -) was confirmed by N 2 bubbling at room temperature.
The properties and physical properties of the material obtained by polymer blending are greatly affected by the mutual solubility between the polymers and the interaction between the polymers affects the compatibility.Depending on the difference in interaction, it can be divided into polymer electrolyte complex, hydrogen bonding complex, stereo complex and so on.Therefore, in order to obtain necessary physical properties, it is important to accurately read many data on the blend and interpret the structure, compatibility and the like.However, polymer blends are often heterogeneous amorphous solids and few applicable spectroscopy.For such polymer blends, solid high resolution nuclear magnetic resonance (NMR) method is particularly effective. Solid high-resolution 13 C NMR method has the advantage that each polymer can be investigated individually because polymer residues can be distinguished and observed.In addition, information on compatibility and molecular mobility can be obtained from parameters obtained by measuring various magnetic relaxation times.
Currently, the following has been reported. When PAAm aqueous solution is bubbled with CO 2, NH 2 becomes NH 3 + and carbamate (NHCOO -) in the initial stage, and ion complex is formed between PAAm and opaque.Further, when bubbling with CO 2, a bicarbonate ion (HCO 3 -) is formed, becomes a counter ion with NH 3 +, the ion complex is eliminated, and becomes colorless and transparent.After that, when N 2 is bubbled at room temperature, HCO 3 - is removed.
In this study, we aim to develop new high-performance polymers, a composite of PAAm and PAANa (PAAm · CO 2 / PAANa) with CO 2 bubbling, PAAm and PAANa complex (PAAm · CO 2 / PAANa) which bubbled N 2 after CO 2 bubbling (CO 2 + N 2) / PAANa) was measured using solid state NMR, IR and structural analysis was carried out.
Conclusion, It is considered that the complex was formed because NH 3 + of PAAm protonated by bubbling and COO - of PAANa formed ion complex by strong electrostatic interaction.From the IR, in addition to the peak of COO- around 1400 cm -1, it has a peak of NH 3 + near 1635 cm -1, and there is a peak of COO- ionically complexed by waveform separation in the carbonyl region of NMR Therefore, it is considered that an ion complex is formed.From the comparison of the waveform analysis of the carbamate peak of PAAm · CO 2 / PAANa complex and PAAm · (CO 2 + N 2) / PAANa complex, removal of bicarbonate ion (HCO 3 -) was confirmed by N 2 bubbling at room temperature.