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was this a PVC? Help?

(4 posts)

  1. Mary Boo
    Member

    The basic raw materials for PVC are derived from salt and oil.
    Chlorine is manufactured by the electrolysis of sodium chloride, salt.
    This is why the first PVC manufacturing plants were located close to natural sources of salt.

    The electrolysis of salt water produces chlorine. The chlorine is then combined with ethylene that has been obtained from oil. The resulting element is ethylene dichloride, which is converted at very high temperatures to vinyl chloride monomer. These monomer molecules are polymerized forming polyvinyl chloride resin.

    For example rigid PVC like the one which is used in windows frames is normally PVCU ("unplasticized"). On the other hand flexible PVC is achieved by adding plasticizers such as phthalates.

    Furthermore, pure poly-chloroethene is unstable when exposed to visible light or UV. In order to modify this disadvantage and make it suitable for different applications antioxidants are added. Some other additives comprise:

    Additives Properties achieved
    Anti-oxidants & other stabilizers Slow down the rate at which the polymer will be degraded by oxygen, heat, visible light or UV radiation
    Compatibilizers Enable PVC to be mixed with other plastics and helps plastic recycling
    Flame retardants Reduce flammability of plastic
    Pigments To colour the plastic
    Plasticisers
    To produce flexible and manageable plastic
    Impact modifiers To absorb shock without damage
    Fillers Inexpensive, inert materials that simply add bulk to the plastic
    Read more: http://www.lenntech.com/polyvinyl-chloride-pvc.htm#ixzz0rVEXpr3F

    Posted 1 year ago #

  2. aziz
    Member

    sounds like pvc, an ekg and if needed a holter test can rule out your doubts, that also with the cardiologists supervision.

    Posted 1 year ago #

  3. Bco4th6th
    Member

    Most PVCs are harmless.

    With so many electrical signals that power the heartbeat, it isn't uncommon for one or two to drop out of sync. This can be exemplified by soldiers marching. With every step in cadence with each other, once in awhile one person will lose their rhythm - to correct it and get back in phase with everyone else, he'll skip a step or two.

    This is what the heart is doing. It is "catching up".

    One of the things that causes this is not drinking enough water and taking in enough salt. Water and salt are responsible for the production of hydroelectric power that the heart, brain, cells and nerve system uses.

    Think of it as a power company that isn't producing enough electricity to power the entire grid efficiently.

    Increase your water and salt intake and you should be okay.

    Posted 1 year ago #

  4. Queryman
    Member

    PVCs are also called Ectopic beats. Know what they are....

    # Ectopic heartbeat is an irregularity of the heart rate and heart rhythm involving extra or skipped heartbeats.

    # Ectopic heartbeats are small variations in an otherwise normal heartbeat that causes an irregular pulse. They may occur without an obvious cause and are usually harmless.

    # Sometimes they are associated with chemical (electrolyte) problems in the blood, which need treatment. They can also happen with ischemia caused by a decrease in blood supply to the heart.

    # Ectopic beats may be caused or made worse by excessive smoking, alcohol consumption, caffeine, certain medications such as stimulants, and some illicit drugs. Shun them.

    # In adults, ectopic beats are common. Their causes should be investigated even if it turns out that no treatment is needed.

    It is true that PVCs or Ectopic beats are weak beats. But then "one swallow doesn't make a summer". And occasional weak beat does not make your heart weak. Moreover, the beat that follows the ectopic is always stronger than normal beat thus compensating the previous weak beat. So, cheer up.

    Posted 1 year ago #

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