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How do matrix dispersion-type systems work?
The drug reservoir consists of particles homogeneously dispersed in a hydrophilic or lipophilic polymer matrix. This matrix is then placed on to of a medicated disk. This is then stuck onto an occlusive baseplate. An adhesive polymer then surrounds this system to create a strip of adhesive rim.
Is fibreglass flammable?
The glass fibers themselves aren't. The polymer matrix they're embedded in may or may not be.
What has the author William Donald Morison written?
William Donald Morison has written: 'The effects of moisture loss and elevated temperature upon the material damping of fibre reinforced polymer matrix composites' -- subject(s): Polymer matrix composites, Temperature effect, Damping, Fiber composites, Moisture content
What types of resin that use in an aircraft?
There are three main types of resin, known as Advanced Composite Materials (ACM), used in aircraft production. The three resins used in aircraft are Polymer Matrix Composites (PMCs), Ceramic Matrix Composites (CMCs), and Metal Matrix Composites (MMCs).
What has the author Frances I Hurwitz written?
Frances I. Hurwitz has written: 'Approaches to polymer-derived CMC matrices' -- subject(s): Ceramic-matrix composites
What has the author Jonathan A Lee written?
Jonathan A. Lee has written: 'Metal and polymer matrix composites' -- subject(s): Metallic composites, Polymeric composites
What are nanopolymers?
Nanopolymers are a class of materials called polymers, which have a nanoscale. Such polymers have nanoparticles in the polymer matrix but with one dimension ranging from 1 to 50nm at the very least.
Is a polypeptide a polymer or monomer?
Collegen is a polymer as it is a (very) large molecule comprised of repeating sub-unitsIt is one of the longest protein strands in the human body and often binds to other collegen molecules forming collagen helices and other helices forming a 'super helix'This helps give collagen it's properties and has extremely varied functions in the cell and extra cellular matrix depending on its arrangement of amino acids
How can you make a flexible polymer more rigid?
At the design stage adding molecules/monomers with more rings than chains will make the polymer more rigid. If this option is not available, adding fiber or particles or fillers is the usual technique. You can make a stiff polymer more flexible by adding plasticizers, but going the other way is more difficult. Technically speaking the polymer itself isn't changing, but the material overall will be more rigid than the polymer matrix due to the fiber support.
What has the author John David Robinson written?
John David Robinson has written: 'A study of some thermo-physical properties of composites based on polymer matrix materials'
What is the distinction between matrix and dispersed phases in a composite material?
The matrix phase is a continuous phase that transfers stress to other phases. It protects phases from the environment. There are three classes of matrix phases which are commonly known as metal matrix composite (MMC), ceramic matrix composite (CMC) and polymer matrix composite (PMC). The dispersed phase is utilised to enhance matrix properties. The classes are particle reinforced composites, fibre reinforced composites and structural composites. Also, dispersed phase geometry is dependent upon concentration, size, shape, distribution and orientation.
What ingredient causes gum to have long lasting flavor?
A vinyl polymer encapsulated matrix. The matrix itself includes about 30% to about 60% acacia gum, about 30% to about 60% corn syrup solids having a DE of between about 24 and about 44 or equivalent hydrogenated starch hydrolysates, and about 2% to about 20% hydrocolloid material, with the acacia gum and corn syrup solids or hydrogenated starch hydrolysates together comprising at least 80% of the matrix. The vinyl polymer comprises between about 30% and about 80% of the long-duration flavor material.
