Thermoplastic Polymer Properties
นอกจากการดูบทความนี้แล้ว คุณยังสามารถดูข้อมูลที่เป็นประโยชน์อื่นๆ อีกมากมายที่เราให้ไว้ที่นี่: ดูความรู้เพิ่มเติมที่นี่
Let’s talk about thermoplastic polymer properties briefly about the production methods of thermoplastic polymers. Thermoplastic polymers are incredibly useful and multipurpose. In this video we go through some of the general properties that many thermoplastic polymers have and briefly we talk about the ways in which thermoplastics are produced, however, these production methods will be covered more in depth in future videos.
This timeline is meant to help you better understand the properties and production methods for thermoplastic polymers:
0:21 Review of Thermoplastic Polymers
1:39 General Thermoplastic Polymer Properties
3:05 Common Thermoplastic Production Methods
Follow \u0026 Support StudySession:
Email Us: StudySessionBusiness@gmail.com
This video is part of our polymer engineering course. Polymer engineering is the study of polymers. In particular the study of polymers different properties and characteristics. In this playlist we will learn everything from the fundamentals of polymers to a more complex understanding of how polymers are derived and characterized.
How to make DIY polyurethane engine mounts
This is the liquid polyurethane I used: https://amzn.to/2VPPayY
Here’s a detailed video showing you how to make polyurethane engine and transmission mounts from liquid polyurethane.
The advantages of doing this as opposed to buying ready made aftermarket polyurethane engine mounts are that this method is much cheaper (25 USD for 4 mounts vs. 160 USD for 2 mounts in the case of my car).
The advantages of polyurethane engine (especially torque mounts) are improved responsiveness, no need to replace the mounts ever again, reduced wheel hop and preventing horsepower lost on moving the engine back and forth.
The video shows a detailed procedure, from removing the old mount inserts, burning out the rubber, and pouring in new liquid polyurethane. The product I used is reoflex 60 from smoothon. There are many others out there however, this is just what was available to me and in the right shore hardness.
The additional benefit of DIY mounts is the fact that you can customize the shore hardness of the mounts to make it best suited to your particular application. I have selected 60A shore hardness which is a nice compromise between the 80A shore hardness stuff which is more suited to track day cars and the 40A shore hardness stock rubber.
The important thing is to ensure the pins inside the mounts are fitted in the same position as stock and they must be positioned to stand flat for the liquid polyurethane to cure properly. Think in advance about where the polyurethane will be drying as this is where the engine mounts will be sitting for anywhere between 1648 hours depending on the tempereture and liquid polyurethane product/brand.
Check out my blog for more MR2 mk1, 4AGE, DIY and more fun car stuff: http://www.driving4answers.com/
d4a diy polyurethane enginemounts engine polyurethanemounts 4age 4age16v aw11 ae86 4agebigport mr2mk1 mr2 toyota jdm celica corolla starlet ke70 fx16
D4A (driving 4 answers) is part of the amazon associates program
Co-Cured Wing Structure Using Dry Carbon Fiber Application/Overbraiding \u0026 Resin Transfer Molding
Watch a demonstration of how Hawthorn Composites can create a cocured wing structure using a combination of dry carbon fiber application \u0026 overbraiding, liquid infusion, and Smart Tools. Learn more about this application at https://hawthorncomposites.com/portfolio/cocuredwingstructuredemonstrationvideo/
1:39 Closing the Mold \u0026 Bagging
2:34 Infusion Process
3:20 Smart Tool Extraction \u0026 Reforming Process
3:58 The Hawthorn Advantage
Hawthorn Composites delivers high value complex composites by deploying low cost materials with liquid infusion and novel manufacturing methods. This combination significantly lowers labor and material costs while maintaining structural integrity and weight neutrality when compared to conventional prepreg and autoclave cured components.
Today we will be demonstrating the advantages of fabricating a cocured control using braided carbon fiber sleevings and resin transfer molding of epoxy resin.
To start, we pull braided biaxial dry carbon fiber sleevings over each of the three smart tools to create the sheer webs and part of the structure of the control surface. The Smart Tools are fixtured together to prevent shifting, and then preshaped dry carbon fiber noodles are secured at each smart tool interface.
Next, 2 layers of quasiisotropic carbon fiber fabric, called QISO, are laid into the mold to form the lower skin of the control surface. Veil can be attached to the outside of the fabric to assist with resin \u0026 air propagation. We then place the laid up smart tools into the mold on top of the lower skin and one layer of the upper skin fabric is pulled over top of the tools. Next multiple custom formed noodles are placed into the trailing edge of the control surface and sealed by the lower skin. Finally, the 2nd layer of the upper skin is pulled over the 1st layer and secured in place.
Now that the lay up is complete, we begin to close the mold. We place the upper half of the clamshell mold onto the lower half and secure it with bolts. Next, we attach the first set of end plates, called intermediate seal plates. Once these are secured with bolts, vacuum bags are pulled through each of the Smart Tools and sealed to the intermediate seal plates. This setup provides a vacuum \u0026 pressure barrier between the internal tool cavity and the dry carbon fiber preform. This will allow us to maintain vacuum \u0026 pressure throughout the process.
After the vacuum bags are secured, the 2nd set of end plates, called pressure plates, are attached to the mold. This will allow the internal cavity of the mold to be pressurized to 75 psi of pressure, creating a reverse autoclave like effect inside the mold.
We are now ready to begin the infusion process. The mold is placed into an oven and plumbed for infusion. We attach two resin exit lines and one resin inlet line to the mold. We will be making the control surface using light resin transfer molding. Next, the mold and resin is preheated and resin is infused to fully wet out the carbon fiber preform. Once complete, the exit and inlet tubes are closed, allowing the pressurized Smart Tools to create a hydrostatic force to consolidate the preform and voids during cure.
After the cure is complete, we remove the mold from the oven and disassemble the end plate. Next vacuum bags are removed from each cavity and the now elastic Smart Tool is extracted with low force from the cured composite part. After extraction, each Smart Tool is placed into the preheated reforming mold, the upper lid of the reforming mold is secured, vacuum bags are pulled through the Smart Tools and sealed to the mold, and vacuum is pulled to reset the geometry of the Smart Tools. Once cooled, the now rigid Smart Tools are ready to begin the next production cycle.
Using the combination of techniques shown in this video; including Smart Tooling, lowcost raw materials, and resin transfer molding, enables the design and fabrication of low cost composite parts with structural integrity and weight neutrality when compared to conventional prepreg and autoclave cured components.
When comparing the Hawthorn method of manufacture to the industry standard manufacturing methods of prepreg and autoclave cure, we commonly achieve cost savings of 2050% over the baseline.
Hawthorn Composites utilizes dry carbon fiber, resin infusion, and novel manufacturing methods to make complex geometry composites parts that are equal in performance and quality to baseline manufacturing methods at significantly lower cost. Learn more about Hawthorn Composites at hawthorncomposites.com
(Operation Manual) Plastic Melter / Densifier (Waste Plastic Recycling into bricks etc)
This is an operational manual on how to use our Plastic Melter, what are the needed materials and mixtures, and sample finish products that can be produced.
Subscribe to stay tuned for more updates.
Like our page: https://www.facebook.com/fskbuilders/
Follow me on Facebook: https://www.facebook.com/jervinchristian
We are located at Tarlac City, Tarlac, Philippines
What is THERMOPLASTIC? What does THERMOPLASTIC mean? THERMOPLASTIC meaning \u0026 explanation
✪✪✪✪✪ http://www.theaudiopedia.com ✪✪✪✪✪
What is THERMOPLASTIC? What does THERMOPLASTIC mean? THERMOPLASTIC meaning THERMOPLASTIC pronunciation THERMOPLASTIC definition THERMOPLASTIC explanation How to pronounce THERMOPLASTIC?
Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/bysa/3.0/ license.
A thermoplastic, or thermosoftening plastic, is a plastic material, polymer, that becomes pliable or moldable above a specific temperature and solidifies upon cooling.
Most thermoplastics have a high molecular weight. The polymer chains associate through intermolecular forces, which weaken rapidly with increased temperature, yielding a viscous liquid. Thus, thermoplastics may be reshaped by heating and are typically used to produce parts by various polymer processing techniques such as injection molding, compression molding, calendering, and extrusion. Thermoplastics differ from thermosetting polymers, which form irreversible chemical bonds during the curing process. Thermosets do not melt, but decompose and do not reform upon cooling.
Stressstrain graph of a thermoplastic material
Above its glass transition temperature, Tg, and below its melting point, Tm, the physical properties of a thermoplastic change drastically without an associated phase change.
Some thermoplastics do not fully crystallize below the glass transition temperature Tg, retaining some or all of their amorphous characteristics. Amorphous and semiamorphous plastics are used when high optical clarity is necessary, as light is scattered strongly by crystallites larger than its wavelength. Amorphous and semiamorphous plastics are less resistant to chemical attack and environmental stress cracking because they lack a crystalline structure.
Brittleness can be decreased with the addition of plasticizers, which increases the mobility of amorphous chain segments to effectively lower Tg. Modification of the polymer through copolymerization or through the addition of nonreactive side chains to monomers before polymerization can also lower Tg. Before these techniques were employed, plastic automobile parts would often crack when exposed to cold temperatures.
นอกจากการดูหัวข้อนี้แล้ว คุณยังสามารถเข้าถึงบทวิจารณ์ดีๆ อื่นๆ อีกมากมายได้ที่นี่: ดูบทความเพิ่มเติมในหมวดหมู่Wiki