Plastic self-reinforcing

RPs that combine two different materials (plastic matrix and reinforcement) are a separate major and important segment in the plastic industry. They are also called plastic composites and composites. There are also self-reinforcing plastics such as liquid crystal polymers (Chapter 1) and others.301 It is a fact that RPs have not come near to realizing their great potential in a multitude of applications usually due to cost limitations that particularly involves the use of expensive fiber reinforcements (carbon, graphite, silica, etc.).1 Information on thermoplastic and thermoset plastic RPs are reviewed in Chapter 15. 

A number of thermotropic polyester-carbonates were prepared through melt-polymerization of substituted hydroquinones and diphenyl tere-phthalate and diphenyl carbonate to have high molecular weight, with reduced viscosity in the range of 2-3. The molecular weights of the polymers can be advanced further by solid state heat-treatment, with the rate of postpolymerization depending on temperature and Concentration of catalyst. Samples of some compositions can be spun into high performance fibers and processed into self-reinforced plastics. The properties of thermotropic polyester-carbonates and polyesters were compared as fibers and plastics. 

Thermotropic Polvester-carbonates as Fibers and Self-reinforced Plastics. The major objective of our study in thermotropic polyester-carbonates was to evaluate... 

The major use of Heveaplus MG is in adhesives. It gives good bond strength for natural rubber to PVC and therefore, it is particularly useful in shoe manufacturing. It is used as a compatibilizer in plastic-rubber blends. It is also used in applications such as automobile bumpers due to its self-reinforcing nature. 

Automotive and aeronautics industries Nanoparticle-reinforced tires external painting nonflammable plastics self-repairing coatings and textiles... 

With both the PEA/P(S-co-MMA) and PB/PS IPN s, an important variable is the ratio of elastomer to plastic in the final material. When the plastic component predominates, a type of impact-resistant plastic results. In this manner the PB/PS IPN s are analogous to the impact-resistant graft copolymers. When the elastomer component predominates, a self-reinforced elastomer results, the behavior resembling that of the ABA-type block copolymers (thermoplastic elastomers) described in Section 4.4. When the overall compositions of both the PB/PS and the PEA/P(S-co-MMA) series are close to 50/50, the materials behave like leathers. 

The combination of low viscosities, shear thirming and low extrudate swelling, plus the processability with ordinary equipment for thermoplastics, makes PLCs much more attractive than EPs for the processing industry. It is mainly in this industiy that PLCs are also known under the name of self-reinforcing plastics. 

A very important feature of PLCs has been already mentimied in Section 41.1.4 thermotropic PLCs are often processable with conventional processing equipment for thermoplastics— in fact, given the orientation of LC sequences, more easily than thermoplastics. It is this ease of orientatiOTi which is the reason for one more name for PLCs, already mentioned above, namely self-reinforcing plastics. 

Liquid crystal polymer resins Self-reinforcing plastics because of their densely packed fibrous polymer chains. Odian GC (2004) Principles of polymerization. John Wiley and Sons, New York. 

K.A. Narh, Liquid crystalline polymer blends as a route to self-reinforcing nanocomposites, Journal of Reinforced Plastics and Composites 28 (16) (2009) 1957-1973. 

Series L, which contains approximately 50 wt % PEAB, provides leathery materials, while series E, which contains 75wt% PEAB, yields self-reinforcing elastomeric materials. Series P contains only approximately 25 wt % PEAB and exhibits properties of toughened plastics. Since polymer I in an IPN is always strained owing to the diffusional swelling forces of monomer II (see Chapter 4), it was of particular interest to prepare an... 

Project Esprit Resource-efficient self-reinforced plastic materials and processing, European Community s Seventh Framework Programme NMP-2007-2.4.1, grant agreement 214355 (2008-2012), www.espritproject.eu... 

Hare C (Ed.) (2010) Esprit - a new project launched to expand the versatility of self-reinforced plastics with partners from across Europe. Technical bulletin, www.espritproject.eu... 

Armordon is also a polypropylene based self-reinforced plastic manufactured by Don Low Ltd. The production process is similar to the production of PURE and combines two different types of PP ensuring a strong affinity between the two components of the tape. Further processing steps may use the tapes directly for winding or tape placement processes or they can be woven into fabrics. Typical applications can be found in the security industry as armor, since Armordon shows an excellent ballistic performance. Additionally, applications in the automotive sector and consumer products such as luggage are imaginable. 

Comfil ApS (2011) Comfil Thermoplastic Composites - Self-Reinforced Plastics http // www.comfil.biz/products/srp.php (wehpage accessed onhne 08.04.11). 

Easy processing the so-called self-reinforcement is achieved by combining existing processing techniques in the plastics industry no chemical synthesis step is involved ... 

On the whole, self-reinforced polypropylene fiber composites incorporate both features of unreinforced and of reinforced plastics in their property sprectrum. A high macromole-... 

Self-reinforced polypropylene fiber composites that are real organic sheets are conquering application fields common for both unreinforced and reinforced plastics due to their excellent property spectrum. Their high macromolecular orientation, which is induced by means of stretching, can be transferred via a composite structure into light and stiff plain structural components. 

N.N. (2006) Advances in self-reinforced PP for manufacturing, Plastics News Intern 3 26. www.milliken.com www.nativewatercraft.com... 

Further development of such studies resulted in the self-reinforced plastics based on LC polymers with main-chain mesogenic groups and laid a foundation for the use of comb-shaped LC polymers as new photoactive materials for optics, optoelectronics, photonics, holography, display technology, telecommrmications systems, and other no-less important areas of modem engineering. " ... 

Liquid crystalline polymer LCPs are best thought of as being a separate, unique class of TPs. Their molecules are stiff, rodlike structures organized in large parallel arrays or domains in both the melted and solid states. These large, ordered domains provide LCPs with characteristics that are unique compared to those of the basic crystalline or amorphous plastics. They are called self-reinforcing plastics because of their densely packed fibrous polymer chains. 

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