By What is special property of liquid crystal polymer?
Properties. A unique class of partially crystalline aromatic polyesters based on p-hydroxybenzoic acid and related monomers, liquid-crystal polymers are capable of forming regions of highly ordered structure while in the liquid phase. However, the degree of order is somewhat less than that of a regular solid crystal.
What is liquid crystal polymer used for?
Liquid crystal polymer (LCP) exhibits a highly ordered structure in both the melt and solid states. LCP can replace such materials as ceramics, metals, composites and other plastics because of its outstanding strength at extreme temperatures and resistance to virtually all chemicals, weathering, radiation and burning.
Which are the types of liquid crystalline polymers LC’s?
To date, thousands of LC polymers have been synthesized. However, only a small number have become commercially important LC materials. The three most common LCPs are semi-aromatic copolyesters, copolyamides, and polyester-co-amides.
What type of liquid crystal is Kevlar?
crystalline polymer
Kevlar’s high tensile strength, which allows it to absorb impacts, has resulted in the development of bullet proof vests and puncture resistant tires. Interestingly, Kevlar synthesis produces a hydrochloric acid byproduct and, together, the two compounds form a liquid crystalline polymer (LCP) phase.
What is liquid polymer made of?
Liquid crystalline polymers (LCPs) are a relatively unique class of partially crystalline aromatic polyesters based on 4-hydroxybenzoic acid and related monomers shown in Fig. 6.2. Liquid crystal polymers are capable of forming regions of highly ordered structure while in the liquid phase.
What is crystal polymers?
From Wikipedia, the free encyclopedia. Crystallization of polymers is a process associated with partial alignment of their molecular chains. These chains fold together and form ordered regions called lamellae, which compose larger spheroidal structures named spherulites.
What do you mean by liquid crystal?
A liquid crystal is a state of matter between liquid and solid (a “mesophase”). Liquid crystals are composed of organic, rod-shaped molecules that align in parallel, and the common types used in electronic displays are nematic, cholesteric and smectic.
What is liquid crystal material?
Liquid crystals (LCs) are a state of matter which has properties between those of conventional liquids and those of solid crystals. For instance, a liquid crystal may flow like a liquid, but its molecules may be oriented in a crystal-like way.
Why is it difficult to 100% crystallinity in polymers?
For XRD a crystal is defined as perfect 3-D order. This corresponds to the strictest definition of a crystal. For a semi-crystalline polymer, for instance, 100% crystallinity is never obtained by this definition since there are large interfacial regions where some degree of disorder is present.
What is liquid crystal explain with example?
Liquid crystals (LCs) are a state of matter which has properties between those of conventional liquids and those of solid crystals. Lyotropic LCs exhibit phase transitions as a function of both temperature and concentration of the liquid-crystal molecules in a solvent (typically water).