Crosslinking of fibrous hydrogels
Mechanical properties of intra-bundle crosslinked PIC hydrogels. a Storage modulus G′ of a crosslinked (1 + 2a, blue data) and a not-crosslinked (only 1, orange data) PIC gel.The heating (solid ...
Mechanical properties of intra-bundle crosslinked PIC hydrogels. a Storage modulus G′ of a crosslinked (1 + 2a, blue data) and a not-crosslinked (only 1, orange data) PIC gel.The heating (solid ...
The storage modulus and viscosity have been satisfactorily modeled as exponential functions of the TG concentration and time with an experimentally calibrated cross-linking kinetic rate constant. Furthermore, the injectability, feature formability, and process-induced cell injury have been successfully correlated to the TG concentration and cross …
Deep cross-fusion of supramolecular chemistry and traditional polymer science has driven the rapid growth of supramolecular polymers 1,2,3,4,5,6,7.Various supramolecular polymers have been ...
The cross-linking reaction of polybutadiene was carried out for a mixture of polybutadiene (M n: ~9,000, 1,2-unit content: ~65% determined by 1 H NMR, as shown in Fig. S1), polyCys, and AIBN as a ...
Due to the decreased plastic behavior, the storage modulus of PTB7-Th:N2200 increased while the loss modulus remained similar (Figure S15, Supporting Information). This change in the viscoelastic behavior resulted in a slightly lower tan δ (i.e., the ratio between loss and storage modulus) relative to increasing 4Bx loading (Figure S15, Supporting Information).
Previously, different techniques were used to identify the crosslinking density of hydrogels. In this study, we aimed to compare three different methods of network structure determination: using sol–gel analyses, rheological and mechanical experiments. To do this, we synthesized a polyvinylpyrrolidone (PVP) hydrogel using gamma-ray crosslinking. The effect …
The cross-link density of model acrylated triglycerides was investigated by LaScala and Wool and was found to increase with the acrylation level for samples with and without styrene (Figure 7.5).The cross-link density was higher for samples without styrene because styrene is a linear chain extender and therefore does not contribute to cross-linking.
The MAH-groups and formation of cross-links decreased the degree of crystallinity, which led to a decrease in the storage modulus at a temperature of 35°C. The storage modulus and dimensional stability of the materials improved with cross-linking density, suggesting potential benefits of LLDPE vitrimers in secondary manufacturing processes ...
To analyze the effect of the change of cross-linking network type and degree of cross-linking on the viscoelasticity of ACM and ACM/POM TPV, a shear strain temperature …
To this end, a sequential cross-linking procedure of GM hydrogels was applied by several authors, which increased the maximum strength 6, compressive modulus 7,8, storage modulus 9,10 and E ...
Herein, inspired by the hydrogen-bonded cross-linking and steric hindrance effect between short-chain polymer molecules (polyethylene glycol-400, PEG-400), the pomegranate-type LiMn0.5Fe0.5PO4-0.5@C (P …
Storage modulus and loss tangent plots for a highly crossi inked coatings film are shown in Figure 2.The film was prepared by crosslinking a polyester polyol with an etherified melamine formaldehyde (MF) resin. A 0.4 × 3.5 cm strip of free film was mounted in the grips of an Autovibron ™ instrument (Imass Inc,), and tensile DMA was carried out at an oscillating …
Storage modulus of linear low-density polyethylene (LLDPE) and high-density polyethylene (HDPE) vitrimer based materials with …
Dynamic mechanical analysis enables the measurement of cross-links in highly cross-linked UHMWPE with better depth resolution than the previously established gravimetric …
Download scientific diagram | Storage and loss compliance modulus of PMMA with cross-linking degree of 1%, as generated from the experimental storage and loss modulus data (Alves et al. 2004 ...
Alginate is composed of irregular blocks of β-d-mannuronic acid (M) and α-l-guluronic acid (G) residues [].CaCl 2 is a commonly used salt to cross-link alginate hydrogels. However, it causes fast gelation that leads to heterogenous cross-linking of the gels [].Alginate hydrogels with slower gelation show better structural uniformity and a higher elastic modulus …
The structure-property relationships developed for the system presented in this work could be useful in tissue engineering, where X-PMMA is applied. The direct measure of storage modulus values before and above glass transition may serve as a simple and fast indicator of the X-PMMA crosslink density …
In general, in addition to chemical cross-linking bonds in the network, entanglements can also contribute to the storage modulus of the samples. VMI-SA has a …
The storage modulus measures the resistance to deformation in an elastic solid. It''s related to the proportionality constant between stress and strain in Hooke''s Law, which states that extension increases with force. In the dynamic mechanical analysis, we look at the stress (σ), which is the force per cross-sectional unit area, needed to cause an extension in the sample, or the strain …
As a result, the storage modulus is a stronger function of frequency (G′ ∼ ω 0.63). Figure 11b shows the variation of storage modulus with frequency at 0.1% strain for PVA-10SSA. Similar ...
In this work, we show that the local heterogeneities arising from domains that are more cross-linked and regions that are less cross-linked result in differential swelling …
Storage modulus of linear low-density polyethylene (LLDPE) and high-density polyethylene (HDPE) vitrimer based materials with varying cross-linking content. Data acquired from tension dynamic mechanical …
The viscoelastic properties of polymers such as the storage modulus, the loss modulus, and the loss tangent show a positive exponential relation with the apparent cross …
Storage modulus (E′) and loss modulus (E″) are determined from the in phase and out of phase response of the materials to an applied oscillating strain. The storage …
The universal relationship between the elastic modulus and the cross-link density of a conventional rubber/gel has been demonstrated experimentally to be inapplicable to gels with slidable cross-links. Herein, we describe the synthesis of slide-ring (SR) gel networks devoid of intramolecular cross-links by the cross-coupling of two differently functionalized …
Storage modulus G'' (filled symbols) and loss modulus G" (empty symbols) are presented. The rheological properties of non-crosslinked LAP/TOCNF are presented in the literature ( Šebenik et al., 2020 ), although, in this study, the focus is on the more complex hydrogel structure of ionically crosslinked TOCNF biopolymer chains.
Storage modulus, loss modulus, and tan δ were calculated at each corresponding frequency and temperature. Master curves of the recombinant resilin were generated from the experimental data and compared with master curves obtained from the natural resilin of cockroaches ( Choudhury, 2012 ) and dragonflies ( King, 2010 ).
The incubation time and genipin concentration influenced the storage/loss modulus and also fluorescence intensity. It is commonly known that collagen cross-linked with genipin emits fluorescence when excited at 590 nm 33]. In this study they determined that genipin-induced cross-linking reaction induces changes in fluorescence which are correlated …
This study focuses on the mechanical properties of ambient temperature cross-linkable acrylic latex polymers synthesized via the semibatch emulsion polymerization reaction. Various …
sample. The storage modulus remains greater than loss modulus at temperatures above the normal molten temperature of the polymer without crosslinking. For a crosslinked polymer, the storage modulus value in the rubbery plateau region is correlated with the number of …
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