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2. Vinyl siding - Wikipedia

   en.wikipedia.org/wiki/Vinyl_siding

   Thicker grades of vinyl siding may, according to some, exhibit more resistance to the most common complaint about vinyl siding – its tendency to crack in very cold weather when it is struck or bumped by a hard object while others feel that a thinner product may allow more 'flex before cracking' and is a subject of debate. However, at "This ...

3. Structural unit - Wikipedia

   en.wikipedia.org/wiki/Structural_unit

   For example, in the synthesis of cross-linked polystyrene, a small fraction of monomeric styrene (or vinylbenzene) is replaced by 1,4-divinylbenzene (or para-divinylbenzene). Each of the two vinyl groups is inserted into a polymeric chain, so that the tetravalent unit is inserted into both chains, linking them together.

4. Calender - Wikipedia

   en.wikipedia.org/wiki/Calender

   Polymers such as vinyl and ABS polymer sheets, and to a lesser extent HDPE, polypropylene and polystyrene, are calendered. The calender is also an important processing machine in the rubber industries, especially in the manufacture of tires, where it is used for the inner layer and fabric layer.

5. Siding (construction) - Wikipedia

   en.wikipedia.org/wiki/Siding_(construction)

   Vinyl siding. Wood clapboard is often imitated using vinyl siding or uPVC weatherboarding. It is usually produced in units twice as high as clapboard. Plastic imitations of wood shingle and wood shakes also exist. Since plastic siding is a manufactured product, it may come in unlimited color choices and styles.

6. Calendering (textiles) - Wikipedia

   en.wikipedia.org/wiki/Calendering_(textiles)

   The wash durability of a calendered finish on thermoplastic fibers like polyester is higher than on cellulose fibers such as cotton, though each depends on the amount and type of finishing additives used and the machinery and process conditions employed. Durability of blended fabrics reflects the above, and the proportion of synthetic fiber ...

7. Vinyl polymer - Wikipedia

   en.wikipedia.org/wiki/Vinyl_polymer

   Vinyl polymers are subject of several structural variations, which greatly expands the range of polymers and their applications. With the exception of polyethylene, vinyl polymers can arise from head-to-tail linking of monomers, head-to-head combined with tail-to-tail, or a mixture of those two patterns. Additionally the substituted carbon center in such polymers is stereogenic (a "chiral center")