Turniere » The elongation at break of LLDPE

Linear low-density polyethylene is a linear polymer with shorter branches made from polythene by copolymerization. This copolymerization is performed on ethylene having longer chains. The linear low-density polyethylene differs from conventional low-density polyethylene. This is because of the absence of branching of chains. The LLDPE is manufactured by processing ethylene at low temperature and pressure by copolymerization.

The process produces molecules with lower weight and density as compared to the conventional LLDPE.


Difference between LLDPE and LDPE


LLDPE and LDPE are inexpensive polymers which are widely used in many areas in the market. Although the properties of LDPE and LLDPE are quite similar such as mechanical and chemical resistance there exists a huge difference between them. The tubing made from LDPE is quite weaker as compared to tubing made from LLDPE. LDPE is preferred when flexibility is the main aspect over LLDPE. Also http://www.airmaxpluswholesale.com/ , the performance of LDPE is enhanced when they are used in the inner surface layer with other polymer have more flexibility.


Production of LLDPE


The LLDPE is produced by copolymerization process. This is initiated by the transition of metals such as Zeigler which are a type of catalysts. This copolymerization is done either in the phase of a solution or can be done in gas reactors. In generally, octene is used as the phase of a solution while butene is used for copolymerization with ethylene.


Properties of LLDPE


1. LLDPE has higher tensile strength
2. The LLDPE is very flexible and elongates
3. The puncture resistance of LLDPE is more than LDPE.
4. A thinner film can be made from LLDPE which are crack resistance.
5. The electrical properties of LLDPE is good
6. LLDPE is well resistance to chemicals.


Processing of LLDPE


During the shearing process of LLDPE, it remains viscous and thus it makes difficult to process as compared to LDPE. The property of LDPE and LLDPE is quite unique having a similarity of rheological or melt flow property. Due to lower shear sensitivity, the LLDPE is faster in stress relaxation. LDPE has greater viscous properties while this lacks in LLDPE due to long chain branching. This helps in sliding of chains without entanglement.


Physical properties of LLDPE


The density of LLDPE is 0.916 gcm^3. The elongation at break of LLDPE is 500% while the oxygen index of 17%. The strain at the yield of LLDPE is 20% with the maximum operating temperature at 50-degree centigrade. The dissipation factor for 1 kHz is 909090 and dielectric constant is 2.3. The melting temperature range of LLDPE is between 120 and 160 degree Celsius. The molding temperature of LLDPE ranges from 22 to 60 degree Celsius.


Application of LLDPE


LLDPE is widely used in many of the fields in the markets such as plastic bags, sheets, plastic wrap wholesale air max plus kids , pouch, toys, lids, pipes, covering of cables, tubs wholesale air max plus mens , and much more. Due to its flexible property is widely used in flexible tubing.

Total Views: 62Word Count: 463See All articles From Author


Fluorescent Lighting Dangers - Why LED Lights Are the Better Choice Home Repair Articles | August 25, 2011
Compact Fluorescent Lights (CFLs) along with more traditional fluorescent lamps are now being aggressively marketed as environmentally friendly due to their reduced electricity consumption. Indeed, widespread replacement of incandescent bulbs with CFLs will greatly reduce electricity demand; however, there are safety issues that ultimately contribute to making LED lighting the superior choice.

Mercury
The most commonly cited fluorescent lighting hazard is mercury. Fluorescent and CFL bulbs contain a small amount of mercury and are identified with the elemental symbol Hg. When these bulbs are cold, some of the mercury in the lamp is in liquid form, but while the lamp is operating or when the lamp is hot wholesale air max plus womens , most of the mercury is in a gaseous or vapor form.
Mercury vapor is extremely toxic. Even in liquid form, contact with mercury is considered life-threatening or a "severe" risk to health. Even very small doses of mercury can cause severe respiratory tract damage, brain damage, kidney damage, central nervous system damage, and many other serious medical conditions.
CFLs average less than 4 milligrams of mercury wholesale air max plus cheap , about the amount that would cover the tip of a ballpoint pen. By comparison, older thermometers contain about 500 milligrams, an amount equal to the mercury in 125 or more CFLs. Although the amount of mercury in each fluorescent lamp is small, it is always important to avoid breaking fluorescent lamps, and used bulbs must be delivered to a hazardous waste handler. Never place fluorescent lamps in trash compactors or