نتایج جستجو برای: sensitive polymers

تعداد نتایج: 350527  

Journal: :Polymers for Advanced Technologies 2021

Stimuli-responsive materials in general and pH-responsive polymers particular have gained increasing interest during the last two decades. Their unique properties, which arise from their ability to exhibit sharp reversible changes response environmental pH conditions, made them suitable for various applications such as drug delivery specific body-site targeting, sensing actuation, membrane func...

1998
A. P. Smith C. Bai H. Ade R. J. Spontak C. M. Balik C. C. Koch

Incorporation of liquid crystalline polymers (LCPs) into commodity polymers remains a challenge in the design of high-performance, low-cost polymeric blends. Blends of a thermoplastic polymer and a nematic LCP are produced here by mechanical alloying. Functionality sensitive X-ray microscopy reveals LCP dispersions as small as 100 nm in diameter. Intimate mixing remains upon subsequent melt pro...

Journal: :ChemistrySelect 2021

Luminescent EuIII coordination polymer with amorphous transformation and thermo-sensing abilities under higher temperature, [Eu(hfa)3(tppa)n]m (hfa: hexafluoroacetylacetonate, tppa: tri-diphenylphosphoryl-4,4,4-triphenylamine) is reported. The glass transition decomposition temperatures are found to be 142 °C 270 °C, respectively. intrinsic emission quantum yield Φ4f−4f of was estimated 69 % in...

2013
Hong-ming Ding Yu-qiang Ma

The major challenge in cancer therapy is to efficiently translocate drug molecules into cancer tumors without doing any damage to healthy tissues. Since there exist pH gradients between tumor and normal tissues, pH-sensitive materials may have great potential to overcome such challenge. Here, we report one new type of pH-responsive drug delivery system where pH-sensitive polymers are introduced...

2008
J. Ray Runyon S. K. R. Williams

A new thermal field-flow fractionation (ThFFF) method has been developed for the separation and analysis of polyacrylates and acrylic-styrene copolymers. This important class of polymers is commonly used as pressure sensitive adhesives, in coatings and paintings, and as the basis for polyelectrolyte materials. The structure and chemical composition of these polymers play a vital role in the end...

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