Why after mixing of polylactic acid in the internal mixer its bulk colour was gray?

Pejman Heidarian @Pejman_Heidarian

08 August 2013 1 10K Report

The condition was 170 degree of C, 5 min and 60 RPM

Thanks.

Sridhar Vadahanambi

two reasons: First, your mixer might not be clean enough, secondly, thermal degradation of PLA..

Badges
Science topic

More Pejman Heidarian's questions See All

What is the best book to understand the basic influence of solvent in the paint and coating technology?

I want to write a proposal about the role of solvent in the paint and coating technology, can anyone help me please?

07 August 2013 3,126 2 View

Why after melt compounding and compression molding of polylactic acid, there is a tendency to develop voids in its bulk structure and it is opaque?

My subject is produce a sheet in 14*10*.25 dimensions. Thank you.

07 August 2013 1,819 5 View

Is polylactic acid soluble in ethanol?

How is it possible? (if yes.)

06 July 2013 9,943 4 View

Why is polylactic acid a hyrophobic polymer exactly? And how much of this is hyrophobic polymer?

05 June 2013 786 3 View

How does one measure the density of a polymer?

For example polylactic acid.

05 June 2013 5,899 6 View

I want to produce nanocomposites based on recycled poly (lactic acid) (rPLA).

Could you please tell me how I can determinate percent of D and L in this polymer exactly? According to my GPC result it is very poly disperse If I prepare micro particles from poly lactic acid as...

05 June 2013 9,484 2 View

Polymer wear calculation?

What is the method for analytically calculating the wear and service life of polymer-polymer sliding pairs?

04 August 2024 1,078 1 View

Simulation of metal drawing by Abaqus with UMAT?

Hello, colleagues. Recently, I have been working on a metal processing simulation with my UMAT in Abaqus. I have outlined the corresponding simulation, but I keep encountering issues that cause...

30 July 2024 7,062 1 View

How to explain the different interaction between soluble and insoluble polymer in water?

Hello everyone, I am try to understand the differences interaction between insoluble and soluble polymers in water with metal ions and how theit charge density (of metal ions) affect the interaction.

29 July 2024 6,350 3 View

Does post-translational protein modification cause devisions on observed pI verses calculated pI?

In running two-dimensional gel electrophoresis on bacterial protein, some spots that appear to match a protein sequence have a significantly more acidic isoelectric point than the calculated pI....

24 July 2024 8,076 3 View

Can a shoot-through event of a tri-state digital buffer cause momentary Hi-Z state?

// interested in the difference between floating events and short circuits.

22 July 2024 6,565 0 View

Is it possible to manufacture polypropylene sheets using a biaxial process?

I know that films and other low-thickness laminated products are produced using biaxial orientation, but is there something similar for sheets with a thickness of around 6 mm? Or are they...

21 July 2024 1,559 1 View

What is the difference between coordination polymer, MOFs, MCOFs?

Wherever I have referred, it puts me in a dilemma about the exact differences between these. It would be really helpful if someone can put me out of this trouble.

21 July 2024 3,045 3 View

Trial exclusion in eye-tracking data?

Is it reasonable to exclude all trials with a blink or saccade in the 150 ms before stimulus onset? As an alternative, would it be better to exclude blinks (after extending them by about 100 ms...

19 July 2024 3,838 0 View

Appearance of crystallization peak in heating cycle of DSC test?

For which types of polymers, the crystallization peak in heating cycle of DSC test can be observed and for which types cant? In another word, when this exothermic crystallization can be observed...

18 July 2024 348 3 View

Interpreting ATR-FTIR Spectra for Microplastics Research?

Hello everyone, I am currently pursuing a PhD in Environmental Engineering with a focus on microplastic studies. My background is in Civil Engineering, and I am relatively new to working with...

18 July 2024 7,258 3 View