Study of the interaction of poly(acrylic acid) and poly(acrylic acid‐poly acrylamide) complex with bone powders and hydroxyapatite by using TGA and DSC

Abstract

The thermogravimetric analysis (TGA) and differential scanning calorimetric analysis (DSC) were used to study the thermal degradation of poly(acrylic acid) PAA and poly(acrylamide) PAAm as well as the compound obtained from their interactions. The examination of the thermal curves revealed that the characteristics of the curves of the compound resulting from the cooperative interactions are different from those of the constituent polymers. The differences in the characteristics of the thermal curves were attributed to the formation of an interpolymer complex resulting from the interaction of PAA with PAAm at low pH value. These two thermal techniques were also used to investigate the thermal behavior of the compounds obtained from the interaction of PAA and (PAAPAAm) mixture with bone powders (BP) and hydroxyapatite (HA). It was found that the TGA, DTG, and DSC curves do not show the peak of formation and degradation of PAA anhydride which provided strong evidence for the consumption of PAA in the reaction between the polymer and BP. The interaction between PAA and the thermally treated BPs and HA was investigated. Moreover the interaction between the mixture of PAA and PAAm at different pH values and the BPs and HA was discussed.

Synthesis of Bamboo-like Multiwall Carbon Nanotube–Poly(Acrylic Acid-co-Itaconic Acid)/NaOH Composite Hydrogel and its Potential Application for Electrochemical Detection of Cadmium(II)

“…The first breakdown peak (300 °C), corresponds to decarboxylation and the second (410 °C) to the depolymerization reaction. Both results are consistent with what was reported in the literature [ 41 ]. On the other hand, the thermograms of PAA-co-IA and PAA-co-IA/NaOH show significant differences due to IA decomposition, which are associated with the signal at 215 °C.…”

Characterization of in situ prepared nano‐hydroxyapatite/polyacrylic acid (HAp/PAAc) biocomposites

“…18 C can be ascribed to the degradation of corresponding PAAc anhydride. These results are in good agreement with the data reported in the literature 30,31 especially those for the low molecular weight of PAAc which equal to 100,000 as reported by Cardenas et al 30 However, the slight shift in the peak positions in the DSC curve (form S 2 to S 4 ) may be attributed to increase HAp ratio. This indicates that the addition of HAp increases the thermal stability.…”

“…31 It can be seen that the improved thermal stability is probably due to the additive effect of HAp filler and the chemical crosslink reaction between the polymer and HAp. Table IV shows the results of weight loss (%) of the HAp/PAAc biocomposite at various temperatures.…”

Synthesis, Characterization of a New Polyacrylic Acid Superabsorbent, Some Heavy Metal Ion Sorption, the Adsorption Isotherms, and Quantum Chemical Investigation

“…The second step starts at 160 °C and ends at 258 °C with a maximum decomposition rate at 258 °C and with a weight loss of 19.0–16.0 wt% from the loss of CO 2 , which coincides with the decomposition of the main chain [ 49 , 50 ]. Then, the third step starts with a maximum decomposition at 417 °C and with a weight loss of 39.9 wt% and then followed by the last step with a maximum decomposition rate at 536.7 °C and with a weight loss of 85.3 wt%.…”