Specific physical and chemical properties of two modifications of poly(N-vinylcaprolcatam)

Influence of the Poly(ethylene Glycol) Methyl Ether Methacrylates on the Selected Physicochemical Properties of Thermally Sensitive Polymeric Particles for Controlled Drug Delivery

“…The maxima in the diffractograms of the P1–P5 co-polymers occurred at approximately the same angles, which suggests that increasing of the length of the polyoxyethylene glycol chain did not result in a shift of the peaks, however, the use of PEGs as co-monomers in the synthesis of the P1–P5 copolymers resulted a small shift of diffractions peaks, approximately of 0.5 degrees, both for the peak 1 and 2, as compared to literature [ 109 , 110 ]. Changes in the intensity of the diffractograms of the tested samples may indicate differences in the molecular structure [ 111 ]. Specifically, this may suggest that co-polymers P2 and P3 have similar molecular structures.…”

The Influence of Initiator Concentration on Selected Properties on Poly-N-Vinylcaprolactam Nanoparticles

“…The products of the hydrolysis is safe polymeric carboxylic acid, as the amide group in the PNVCL molecule is directly connected to the polyvinyl side chain carbon [17]. Poly-NVCL has a lower critical solubility in the 32–34 °C temperature range, beneficially close to the temperature of the human body [18]. These properties support the role of poly-NVCL as suitable for "smart" drug carriers.…”

The impact of intense types of effects on poly(N‐vinyl caprolactam) and composites in the system nanoscale anatase – poly(N‐vinyl caprolactam)

“…Splitting of the 1st diffuse peak of PVCL40‐F [Figure 1(a)], which retained for PVCL40‐F(MWT) [Figure 1(b)] (effect 1–1) but disappeared for PVCL40‐P [Figure 1(d)] and PVCL40‐P(MWT [Figure 1(e)] is possibly caused by the fact that thin PVCL films include regions with different orientation ordering of domains 44 . It is promoted by the presence of a constant dipole moment for PVCL 42 . We can assume that supramolecular structures – domains in near‐surface layers of thin films (structural elements of polymer several nanometers in size, in the limits of which the short‐range order in the mutual arrangement of chains or their segments is followed) are oriented under various angles to the film surface 44,45 .…”

“…Figure 3 shows X‐ray diffraction patterns of PVCL25A‐F and PVCL40A‐F films [Figure 3(a), (b)] 39 and the same PVCL25A‐P and PVCL40A‐P films ground into powder [Figure 3(c), (d)] 42 , and I max(2) > I max(1) (effect 2–2) for PVCL40A‐F [Figure 3(b)] and PVCL40A‐P [Figure 3(d)] compared to PVCL25A‐F [Figure 3(a)] and PVCL25A‐P [Figure 3(c)].…”