The effect of component addition order on the properties of epoxy resin/polyurethane resin interpenetrating polymer network structure

2020 ◽  
Vol 138 (7) ◽  
pp. 49833
Author(s):  
Hsien‐Tai Cheng ◽  
Ya‐Shiuan Lee ◽  
Hsu‐Chen Liu ◽  
Wen‐Jau Lee
Keyword(s):  
Epoxy Resin ◽  
Network Structure ◽  
Polymer Network ◽  
Interpenetrating Polymer Network ◽  
Polyurethane Resin ◽  
Component Addition

Synthesis and characterization of a novel wound dressing by PVP/ PAANa/chitosan with semi-interpenetrating polymer network structure

e-Polymers ◽  
2012 ◽  
Vol 12 (1) ◽  
Author(s):  
Ying Wu ◽  
Qing Yang ◽  
Yali Gi ◽  
Yueting Zhang
Keyword(s):  
Network Structure ◽  
Wound Dressing ◽  
Polymer Network ◽  
Interpenetrating Polymer Network ◽  
Wound Dressings ◽  
Synthesis And Characterization ◽  
Cross Linking ◽  
Mass Ratio ◽  
Scanning Electron

AbstractA novel hydrogel wound dressing with semi-interpenetrating polymer network structure (semi-IPN) was prepared by radical polymerization of acrylic acid with potassium persulfate (K2S2O8) as initiator and N, N'-methylenebisacrylamide (MBA) as cross-linking agent in the presence of chitosan (CTS) and polyvinyl pyrrolidone (PVP). Hydrogels were characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). SEM displayed semi- IPN hydrogels' creased surface with some scale-like wrinkles, thus improving the absorptive capability which has been considered as a most important characteristic of wound dressings. It was found that the content of cross-linking agent and the mass ratio of PVP and CTS had much influence on the mechanical properties of the hydrogel, varying from brittle plastics to elastomer due to the different degrees of cross linking. Since tensile strength is partly in inverse ratio to the hydrogel absorbent capability, the article offers an analysis of varying material proportion in order to obtain an optimum properties of the hydrogel wound dressing .

Temperature- and pH-tunable plasmonic properties and SERS efficiency of the silver nanoparticles within the dual stimuli-responsive microgels

2014 ◽  
Vol 2 (35) ◽  
pp. 7326-7335 ◽  
Author(s):  
Xiaoyun Liu ◽  
Xiuqin Wang ◽  
Liusheng Zha ◽  
Danli Lin ◽  
Jianmao Yang ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Network Structure ◽  
Ph Value ◽  
Polymer Network ◽  
Interpenetrating Polymer Network ◽  
Stimuli Responsive ◽  
Plasmonic Property

Plasmonic property and SERS efficiency of the silver nanoparticles embedded within the microgels with an interpenetrating polymer network structure can be reversibly tuned by temperature and pH value.

scholarly journals pH/TEMPERATURE DUAL STIMULI RESPONSIVE MICROGELS BASED ON INTERPENETRATING POLYMER NETWORK STRUCTURE

2009 ◽  
Vol 009 (7) ◽  
pp. 638-644 ◽  
Author(s):  
Jun YANG ◽  
Xiao-yun LIU ◽  
Jie YAN ◽  
Lan LI ◽  
Liu-sheng ZHA
Keyword(s):  
Network Structure ◽  
Polymer Network ◽  
Interpenetrating Polymer Network ◽  
Stimuli Responsive

A Research of the Spongy Foams from Interpenetrating Polymer Network of Polyurethane/ Epoxy Resin

2012 ◽  
Vol 621 ◽  
pp. 39-43
Author(s):  
Hong Jun Huang ◽  
Wang Kang ◽  
Guo Shun Wan ◽  
Jiang Lei
Keyword(s):  
Epoxy Resin ◽  
Polymer Network ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Interpenetrating Polymer Network ◽  
Initial Adhesion ◽  
Epoxy Content

A series of interpenetrating polymer networks (IPN) spongy foams based on polyurethane (PU) and epoxy resin (EP) were prepared by a simultaneous polymerization technique. The PU/EP IPN spongy foams with different epoxy content were investigated. The results showed that initial adhesion increased with the increment of EP content, and gained the highest value when the content reached to 20%; FTIR suggested the formation of PU/EP IPN; the density also increased with the increasing content of epoxy; the highest degree of uniformity in bubbles were observed in foams with 20% content of epoxy resin.

Rapid response of a poly(acrylamide) hydrogel having a semi-interpenetrating polymer network structure

2006 ◽  
Vol 17 (9-10) ◽  
pp. 794-797 ◽  
Author(s):  
Takashi Miyata ◽  
Noriko Asami ◽  
Kaori Okawa ◽  
Tadashi Uragami
Keyword(s):  
Network Structure ◽  
Polymer Network ◽  
Rapid Response ◽  
Interpenetrating Polymer Network ◽  
Poly Acrylamide

scholarly journals Synthesis and Structure of Organic-Inorganic Hybrid Semi-interpenetrating Polymer Network Gels

2016 ◽  
Vol 8 (1) ◽  
pp. 165 ◽  
Author(s):  
Naofumi Naga ◽  
Yukie Uchiyama ◽  
Yuri Takahashi ◽  
Hidemitsu Furukawa
Keyword(s):  
Molecular Weight ◽  
Network Structure ◽  
Polymer Network ◽  
Mesh Size ◽  
Polymer Chains ◽  
Relaxation Peak ◽  
Interpenetrating Polymer Network ◽  
Solution Temperature ◽  
High Concentration ◽  
Transition Networks

Semi-interpenetrating polymer network (semi-IPN) gels have been synthesized using a hydrosilylation reaction of 1,3,5,7-tetramethylcyclotetrasiloxane (TMCTS) as a joint molecule, and a,w-nonconjugated dienes, 1,5-hexadiene (HD) or 1,9-decadiene (DD) as linker molecules in the presence of polystyrene (PS) as a liner polymers in toluene or cyclohexane. Network structure, mesh size and mesh size distribution, of the resulting semi-IPN gels was quantitatively characterized by means of a scanning microscopic light scattering (SMILS). The relaxation peaks derived from three kinds of structures were detected in the semi-IPN gels prepared in toluene by the SMILS analysis. One was derived from the mesh formed by TMCTS/a,w-nonconjugated dienes about 1-2 nm. Others were derived from transition networks about 20-150 nm and large clustered liner polymer chains about 700-2300 nm. Effect of concentration and molecular weight of the liner polymer on the network structure of the semi-IPN gels in toluene was investigated. The relaxation peaks derived from transition networks or random coils formed by aggregated PS chains were detected in the semi-IPN gels containing high concentration or high molecular weight PS. The semi-IPN gels containing PS were also prepared in cyclohexane as a poor solvent for PS at 40ºC, which was a higher temperature than the upper critical solution temperature (UCST = 34ºC) of PS in cyclohexane. The network structure of the semi-IPN gels was traced by SMILS on the cooling process. In the semi-IPN gel with the short linker molecule of HD, the relaxation peak derived from clustered PS chains was detected over the UCST. By contrast, the relaxation peak derived from transition network was observed in the semi-IPN gel with the long linker molecule of DD.

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