What are rigid rod polymers?
Rigid-rod polymer fiber is an important kind of high-performance fiber, which plays a significant role in the fields of aerospace, aviation, protection, and safety. In this chapter, the general background of rigid-rod polymer fiber development is presented.
Which polymers are water soluble?
Water-soluble polymers such as polyethylene glycol, polyacrylamides, polyacrylic acid copolymer, and polyvinyl alcohol are organic polymers that dissolve, disperse, or swell in water and consequently change the physical properties of aqueous systems undergoing gelation or thickening.
What makes a polymer rigid?
At first, adding cross-links between polymer chains makes the polymer more elastic. The vulcanization of rubber, for example, results from the introduction of short chains of sulfur atoms that link the polymer chains in natural rubber. As the number of cross-links increases, the polymer becomes more rigid.
What does it mean if a polymer is classified as synthetic?
There are two types of polymers: synthetic and natural. Synthetic polymers are derived from petroleum oil, and made by scientists and engineers. Examples of synthetic polymers include nylon, polyethylene, polyester, Teflon, and epoxy. Natural polymers occur in nature and can be extracted. They are often water-based.
What is water soluble plastic?
Water-soluble packaging is a plastic-like material which effectively dissolves in water, with no harmful residuals. Could this material be utilised for eCommerce packaging? We all know of the damage plastic pollution is having on our planet and its oceans- could water-soluble packaging be the answer.
What is water soluble?
Definition of water-soluble adjective. capable of dissolving in water.
What are 3 common polymers?
The eight most common types of synthetic organic polymers, which are commonly found in households are:
- Low-density polyethylene (LDPE)
- High-density polyethylene (HDPE)
- Polypropylene (PP)
- Polyvinyl chloride (PVC)
- Polystyrene (PS)
- Nylon, nylon 6, nylon 6,6.
- Teflon (Polytetrafluoroethylene)
- Thermoplastic polyurethanes (TPU)
Are branched polymers more rigid?
1.11. Thus, branched polyethylene is generally less rigid, dense, brittle, and crystalline than linear polyethylene, because the former polymer contains a significant number of relatively short branches.
Why are linear polymers more rigid?
The cross-linked polymer forms long chains, either branched or linear, that can form covalent bonds between the polymer molecules. Because cross-linked polymers form covalent bonds that are much stronger than the intermolecular forces that attract other polymer chains, the result is a stronger and more stable material.
What are the 3 types of polymers?
From the standpoint of general physical properties, we usually recognize three types of solid polymers: elastomers, thermoplastic polymers, and thermosetting polymers. Elastomers are rubbers or rubberlike elastic materials.