primers
- Thread starter lucius
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bigsegs
Guest
A polymer (from Greek πολύ-ς /po΄li-s/ much, many and μέρος /΄meros/ part) is a large molecule (macromolecule) composed of repeating structural units typically connected by covalent chemical bonds. While polymer in popular usage suggests plastic, the term actually refers to a large class of natural and synthetic materials with a variety of properties.
Well-known examples of polymers include plastics and proteins. A simple example is polypropylene, whose repeating unit structure is shown at the right. However, polymers are not just limited to having predominantly carbon backbones, elements such as silicon form familiar materials such as silicones, examples being silly putty and waterproof plumbing sealant. The backbone of DNA is in fact based on a phosphodiester bond.
Natural polymer materials such as shellac and amber have been in use for centuries. Biopolymers such as proteins and nucleic acids play crucial roles in biological processes. A variety of other natural polymers exist, such as cellulose, which is the main constituent of wood and paper.
The list of synthetic polymers includes Bakelite, neoprene, nylon, PVC, polystyrene, polyacrylonitrile, PVB, silicone, and many more.
dunno what any of this means though..
think church is probably bang on..
Well-known examples of polymers include plastics and proteins. A simple example is polypropylene, whose repeating unit structure is shown at the right. However, polymers are not just limited to having predominantly carbon backbones, elements such as silicon form familiar materials such as silicones, examples being silly putty and waterproof plumbing sealant. The backbone of DNA is in fact based on a phosphodiester bond.
Natural polymer materials such as shellac and amber have been in use for centuries. Biopolymers such as proteins and nucleic acids play crucial roles in biological processes. A variety of other natural polymers exist, such as cellulose, which is the main constituent of wood and paper.
The list of synthetic polymers includes Bakelite, neoprene, nylon, PVC, polystyrene, polyacrylonitrile, PVB, silicone, and many more.
dunno what any of this means though..
think church is probably bang on..
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spunkybum
Guest
;D..........good though chuck it in th faq
church
Well-Known Member
I know british gypsum no longer reconmend pva and havent done for some years but i think all bonding agents are way over priced compared to pva and out of them all the wickes stuff is the best to skim over a bond it mixes up easyier (stirs up and the silicone sand does not sink back down) and betacontak rolls on and covers best
never used gyprime but it dilutes and goes miles .
never used gyprime but it dilutes and goes miles .
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bigsegs
Guest
anyone wanna do 'suction control' in the faq? easily cocked up for a beginner..
dont think we should spunky write about anything with the word "suck " in it ;D
richardbrown
Private Member
I always thought bond it smelled a bit like sbr but i could be full of s**t
Rich
Rich
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bigsegs
Guest
mmmm styrene.... love it ;D
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