17 Questions 21 Answers 0 Followers
Questions related from Ismail Khan
Hi, I am using free radical polymerization of MMA monomers (MW=100 Da)in order to produce PMMA. But when I do DSC analysis to find out the Melting point . It simply does not show any sharp peak...
16 June 2025 1,456 6 View
Hi , I have received AIBN from Sigma Aldrich and it is in 12% acetone solution. I need AIBN as initiator for free radical polymerization. How do i extract it from Acetone solution as i need it in...
17 April 2025 8,581 1 View
Hi Everyone, I am performing free radical polymerization of MMA using AIBN as an initiator and DMF as a solvent (I NEED TO USE A SOLVENT AS IT IS REQUIRED OF THE PROJECT NEXT STEP). I varied AIBN...
14 March 2025 2,902 4 View
I am conducting free radical polymerization with the following conditions: Initiator: AIBN Solvent: DMF Monomer: MMA (5 g) Initiator Amount: AIBN (0.04 g) Solvent Volume: DMF (20 mL) Reaction...
04 February 2025 9,424 5 View
I am conducting free radical polymerization using Kraft lignin and MMA, with DMSO serving as the solvent and there is also an initiator. Following the reaction, I obtain a solution, but I am...
16 July 2024 10,166 1 View
Hello Researchers, I am using Kraft lignin, but when i do DSC analysis, it shows two peaks or melting points. MY question is: how can i purify this kraft lignin to get only one peak or melting...
02 April 2024 1,271 3 View
Hello everyone, I’m currently working on synthesizing polymers using methacrylated kraft lignin and methyl methacrylate (MMA) through free radical polymerization. My chosen initiator is...
15 March 2024 9,532 9 View
Hi, I am using kraft lignin to react it with methacrylic anhydride. The reaction uses THF as a solvent and 1-imidizole as a catalyst . I am just curious: can I use another solvent, like DMSO, in...
12 December 2023 911 0 View
Hello Everyone , I am performing a buckling analysis on laminated composites shells. The load I am getting in Non Linear Riks method is greater than the Eigen Value Load . Can someone help me with...
14 May 2017 237 2 View
hello every one good day. i am using abaqus to perform a non linear buckling analysis in order to match it the experimental buckling load ,i have to use imperfection in my model but Increased the...
07 May 2017 4,773 3 View
hello every one i want to create this type(picture attached) of mesh around the cutouts in abaqus can any one help me and tell me the step wise procedure how i can create this....picture is...
24 January 2016 1,074 5 View
hello every one i m working on delamination buckling analysis in abaqus 6.14... now i want to add geometric imperfection in my model while i m using general static step for buckling analysis...
11 October 2015 6,174 16 View
hello every one... i m modeling composite laminates consist of an UPPER and Lower part which are tied through a cohesive elements, the stacking sequence is [45/0/-45/0/45/0/-45/0/45/0]2s... Where...
03 October 2015 5,976 5 View
Hello every one..i would be glade if some one could explain to me the difference between creating a solid composite layup and continuum shell lay up(1) How are the plies are assigned to the...
01 September 2015 9,996 1 View
Hello! i want to perform Delamination buckling growth in laminated composites using cohesive elements.. my model consist of two plates with 1e-6 thickness of cohesive element layer i use offset...
06 August 2015 9,491 4 View
Hello good day I'm regenerating a reference paper model in ABAQUS. I'm working on delamination buckling and its growth in cylindrical laminates using COHESIVE ELEMENT method for modeling...
30 July 2015 6,080 4 View
i m working on modeling of delamination region in composite shell,but i don't understand how to create delamination region in cylindrical shell by creating sublaminates within the shell,,,can u...
05 June 2015 8,420 8 View
