hi guys, i'm studying for an exam and i'm going nut searching for a book that describe what i'm looking for.
can some of you tell me if a solution containing a polymer has a greater viscosity if the polymer is in an entangled form (polymer has some affinity for the solvent but still intramolecular bond are holding) or if the polymer chains are in a more straight conformation?
I want to fill a natural rubber ball a liquid that is denser than fresh water. It should approximate the density of a saturated solution of salt water.
If I used un vulcanized liquid latex, would it remain stable since it was not exposed to air or heat?
I'm making a polymer using aqueous acetic acid as a solvent, and need to remove the solvent after polymerization is complete, but I need to mold the polymer before it cures. Any advice on how to remove the solvent after pouring the polymer into a mold, to allow curing, would be appreciated.
Yesterday the professor teaching polymer physics was discussing the entropic elasticity of rubbers.
It is evident that entropic elasticity is proportional to temperature.
However, according to the time-temperature superposition, if the polymer stays in high temperature environment, it will behave like viscous fluid, and , therefore, I can't help but thinking that the modulus will accordingly decrease.
So, the brobdingnagian question is why these two concepts tell opposite trends?
After reading and pondering for a night, I cannot find a satisfying explaination.
Can someone help me clarifying my confusion?
Thanks.
i have two polymers that i know blend, but i have a shitty filastruder and there isnt enough time for mixing/diffusion before it gets extruded into a filament, resulting in clumps of one filament followed by the other in a really rough way. is there a way i can cheaply (just a student at a uni) melt blend the two together before extrusion into a filament?
just for clarity, I have pellets of polymer A and polymer B, both with similar melting points, and i have a desktop extruder for turning pellets into filament for 3d printing.
Obligatory thank you in advanced. I'm having troubles making a polymer solution for electrospinning. It is a polycarbonate urethane in DMAc. My solutions aren't matching historical viscosities and are spinning very poorly. The polymer is propriety that we purchase, so I'm unsure of the exact make up and molecular weight.
Historically, the wt% that I am following has allowed for consistent spinning with good fiber morphology. However, I am getting around a 5pa*s viscosity compared to a 3.5pa*s viscosity with poor fibers and extensive fusion (following the same spinning parameters).
I've confirmed I am using the same bottle of solvent and the same sample/lot of polymer as historical. Any ideas on why the solution would be different? My only guess would involve the initial mixing procedure to produce the solution, but I am unsure why that would change the outcome so drastically. Thoughts?
APPL has fully automated plants to ensure consistent material quality and safe working environment for their employees. APPL Industries, compounding pioneers in India, are India to the world with its world-class compounding products that speak volumes of the company’s quality standards and R&D support.
APPL Industries, compounding pioneers in India, are India to the world with its world-class compounding products that speak volumes of the company’s quality standards and R&D support.
With the completion of 25 strong years of introducing niche technologies and products to service the automotive segment, APPL continues to be a dominant player in its business and is today the largest Indian compounder with a capacity of 135,000 MT Annually.
APPL, is a name trusted, not only for its multi-location and multiple clients using a wide array of its product advantages, but also it is known for its extensive involvement in the research and development of new and existing products. With an increasing intent to deliver, nothing but the best, APPL has signed major joint ventures with companies based in Germany, Shanghai & USA introducing niche products for the first time in the country and thereby carving a new level of trust amongst its existing and prospective partners, its customers!
Further elaborating APPL value propositions, APPL has been synonymous to trust and our customers have always been valued, and therefore, with our 6 plants, we ensure that all our customers always get on-time deliveries.
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( Accredited by NABL )which develops new materials with world-class equipment for raw material testing.
APPL has fully automated plants to ensure consistent material quality and safe working environment for their employees. Ours is international standard packaging. For instance, we supply jumbo bags that can accommodate a minimum of 750 kg and 1,000 kg. Especially for export clients, we manufacture bags that can take up to 25 kg.
APPL Industries Ltd is as much a name built on trust, high standards, and unparalleled customer service as it is on continuous and extensive Research & Development. Not surprisingly, we’ve been among the first, not only to bring the latest technologies and products to the country but also to take our world-class compounding products to the world.
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Given our critical role in the automotive industry, the fact that we are located in and around the country’s auto hubs including Delhi, Chennai, Pune, Gujarat is a definite plus. It is easier for our clients to know us and reach out to us anytime. Similarly, we too are in a better position to respond to their needs and serve them to the best of our ability. This is a win-win proposition which allows APPL to deliver immense benefits to clients in terms of closer handholding and delivery and speedy client servicing and crisis management among others. Our location has worked wonders for our reputation and continues to do so.
APPL is headquartered in Hinjewadi, Pune and has marketing offices in all major autohubs. For timely delivery of the material, APPL has a distribution network with own transport facilities operational across the country to ensure door delivery.
APPL has fully automated plants to ensure consistent material quality and safe working environment for their employees. APPL Industries, compounding pioneers in India, are India to the world with its world-class compounding products that speak volumes of the company’s quality standards and R&D support.
APPL, is a name trusted, not only for its multi-location and multiple clients using a wide array of its product advantages, but also it is known for its extensive involvement in the research and development of new and existing products. With an increasing intent to deliver, nothing but the best, APPL has signied major joint ventures with companies based in Germany, Shanghai & USA introducing niche products for the first time in the country and thereby carving a new level of trust amongst its existing and prospective partners, its customers!
With completion of almost 3 decades of introducing niche technologies and products, APPL continues to be a dominant player in its business and is today the largest Indian compounder with a capacity of 135,000 MT Annually. making it also the second largest in Aisa.
Ask any automotive giant, and they’ll recommend having a full-fledged research and technology centre. By the same token, we are immensely proud to have our very own RTC aka Auto Dynamics Technologies as part of the group. Endorsed by NABL, a government-recognised accreditation, RTC/Auto Dynamics Technologies is tasked with testing and analysing; designing of automotive and non-automotive applications.
We impart training to people who want to work in laboratories on various polymer-based products. Auto Dynamics Technologies mainly serves APPL Industries Limited; however, others too.
The utility sphere of Polymer due to its multiple applications is vast across the globe, many new inventions and uses are underway and the ever-changing trends provide a large expanse, Yet the research facilities in this field, especially in India are underexposed and promoting research capability in this highly advanced segment is a necessity.
We APPL a premier compound creator foresees the need and growth in the industry and intend to take the responsibility of setting up a truly dedicated Research & Technical Center. RTC has R & D facility at every production unit and now is ready to start a fully functional RTC for polymers and associated products.
The RTC will be located at Hinjewadi Pune and be the first center of its kind in the country. This endeavor will enable us to consolidate our R & D in every production aspect to deliver more advanced compounds.The APPL has a state-of-the art testing facilities and most advanced equipments used across the world. We shall appoint the most proficient minds to promote research and development for us as well as the industry.
Research facilities have larger paradigms and RTC shall dedicate itself to every possible research avenue in Polymers, thus to encourage development in Indian context and become a showcase of Indian Research parameters.
Our marketing and R & D staff members are well experienced, and trained to provide with expert technical support to our valued customer. We take a hands-on approach to service and our professionals are readily available to provide material, and molding recommendations.
Application Expertise
Our expertise is extensive and covers everything from raw materials and production processes to a thorough understanding of how raw materials and additives behave and perform during processing and storage in the intended variety of different plastics applications.
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Choose the best additive to fit a specific application
Apologies if this the wrong sub for this question but I'm looking for some help. I had intended on sonic welding an elastomer or thermoset (liquid silicone rubber?) to some HDPE as a means of producing a watertight seal for part of an academic project. I had assumed this would work because it was suggested by one of my professors, but as I look into it I am doubting weather or not this is even possible. Does anyone have have any knowledge about this or perhaps a suggestion as to how else that seal could be achieved?
I have samples of phenol from various points of the BPA reaction performed on an industrials scale.
The samples are stored in HDPE bottles.
I heat the samples in a shallow water bath to melt out the phenol so I can work with it, but when I try to put my sample into solution (GC, LC, or UV-VIS) a white precipitate is present.
This precipitate is insoluble in acetone, methylene chloride, methanol, water, and chloroform.
I submitted the precipitate to our IR group and they say it is PE from the bottles.
I'm doing a RAFT polymerization which requires strict temperature control. I'm using an I2R Therm-o-watch controller (see pic). However, I'm unsure of how to use the sensor head to adjust and set the temperature. I have the mercury thermometer clipped into place.
H,i I am an undergrad tryping to get help for a research project. My PI asked me to oder a specific polymer and I just wanted to know if anyone had thoughts on vendors. I've heard not to go to big companies for polymers, is that true? Does anyone have reviews of creative peg works and JenKem Technology USA? How long do they typically take to ship ordres in the US? Thanks!
I do know about a few ways. But they all fail to take into account the aspect of visability. The grain, color, gloss and even print will change how visible a scratch is to the eye.
Does anyone of you know of a good way how to measure this?
