pva cross-linking with borax

Experimental Study on Flow Characteristics with Gel

The molecular weight of PVA is 22 000 and the saponification degree of PVA is about 86 5–89 0 mol% Figure 1 shows the gel reaction scheme when aqueous solutions of PVA and borax are mixed The borax solution acts as a crosslinking agent to the aqueous PVA polymer solution and the gel is formed from the cross-linking reaction

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Role of boric acid for a poly (vinyl alcohol) film as a

These results indicate that boric acid reacts to the PVA chains in the amorphous regions resulted in cross-linking points for the PVA chains These cross-linking points inhibit recrystallization during a dry process after immersing the film in boric acid aqueous solutions and melting processes because the cross-linking points slow down the

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பிளப்பர்

பொதுவாக போரோன் குறுக்கு-இணைவு விணை (cross-linking) மூலம் உருவாகும் பாலிவினைல் ஆல்கஹால் ( polyvinyl alcohol (PVA) ரப்பர் நெகிலி க்லார்ப் Glorp க்லர்ச் Glurch

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PVA polymer slime

The cross-linking between the polymer chains of polyvinyl alcohol occurs by adding borax Na 2 B 4 O 7 10H 2 O (sodium tetraborate) PVA glue contains amongst other things the polymer polyvinyl alcohol (also called polyethenol) Polyvinyl alcohol has the structure: Borax forms the borate ion when in solution This ion has the structure:

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PREFACE

Cross-linking agents include chromium and aluminium salts Several sources indicated that isocyanate cross-linking agents may be used in New Zealand although no use was actually identified in this survey Isocyanate cross-links with 'impurities' in the PVA including hydroxyl and carboxyl groups This cross-linking agent results

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Playing with Polymers

PVA Slime Activity: Preparation of the PVA solution should be carried out under a fume hood or in a well ventilated class room The Polyvinyl Alcohol as a solid is mixed in water to make a 4% solution That means add 40 0 g of PVA to enough water to make a 1 0L solution The best

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Experimental Study on Flow Characteristics with Gel

The molecular weight of PVA is 22 000 and the saponification degree of PVA is about 86 5–89 0 mol% Figure 1 shows the gel reaction scheme when aqueous solutions of PVA and borax are mixed The borax solution acts as a crosslinking agent to the aqueous PVA polymer solution and the gel is formed from the cross-linking reaction

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Amazon: Steve Spangler Science Glow in The Dark

Buy Steve Spangler Science Glow in The Dark Atomic Glow String Slime Kit 32 oz – DIY Slime Kit for Kids Requires No Glue PVA or Borax Hands-On STEM Learning Tool for Classroom and Home Use: Slime Putty Toys - Amazon FREE DELIVERY possible on eligible purchases

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Borax Essay

investigate how the volume of borax affects the spread of PVA glue My teacher (Mr Pillay) put our class into partners and my partner was Jermaine There were two outliers which we had to cross out because they do not fit with the rest of the results this could have occurred because we may have either timed it for too long or they may have tested it an unequal amount of times

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How to Make Flubber with Borax and Glue

Flubber is a non-toxic gooey substance that has no practical purpose aside from being a fun craft project for children However adult supervision is recommended during creation and play Flubber can be made in only a few minutes using a combination of borax glue and food coloring

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Ecotoxicological Properties of Tulipalin A

Reference borate-crosslinked PVA hydrogels (containing increasing amount of borax cross-linker) revealed harmful effect on plants The negative effect was observed on most of the investigated properties increasing with content of the hydrogel in soil and concentration of the borax in it

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What you will need

Measure out 5cm3 of the borax solution in a second measuring cylinder Now slowly add the borax to the PVA stirring all the time A gel will form Remove the gel from the cup and work it in your hands for 2-3 minutes to complete the cross-linking and to eliminate air from the slime Optional: Pupils can complete Pupil Activity Sheet

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Porous Tubular PVA Hydrogels: Preparation and Assessment

Therefore PVA is hydrophilic [5 6 7] PVA hydrogels requires cross-linking to improve their mechanical properties and to extend their degradation time Physical cross-linking and chemical cross-linking are two common methods used to process PVA hydrogels The chemical cross-linking uses glutaraldehyde or borax as chemical cross-linking

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Curcumin incorporated PVA‐borax dual delivery hydrogels

Poly(vinyl alcohol) (PVA) is a biocompatible polymer which can be physically crosslinked by Borax to form hydrogel PVA‐Borax (PB) hydrogel is a promising candidate for drug delivery system Therefore it is necessary to find the quantitative relationship between drug release rate and network structure of PB hydrogels to predict and control drug release rate

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Wither art thou Slimer?

School holiday time Thinking of neat science-y things to do with my seven-year old niece Slime seemed to be the obvious choice The recipes online all seem much the same - a 50/50 solution of white PVA glue and some borax solution combine the two solutions voila slime

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Investigating cross

Investigating cross-linking – making slime PVA glue contains the polymer polyvinyl alcohol (also called polyethenol) and has the structure: Borax forms the borate ion when in solution This ion has the structure: The borate ion can make weak bonds with the OH groups in the polymer chains so it can link the chains together as shown below

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How to make slime with boric acid (without borax)

PVA glue from kmart Get a couple of bottles so you can have another go Either buys smaller ones as if they're not capped properly they dry out or a large one with a screw lid Water Food colouring glitter or anything else you want to add to glitz it up We've used blue food dye in the photo Equipment 2 nonporous bowls (stainless

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PREFACE

Cross-linking agents include chromium and aluminium salts Several sources indicated that isocyanate cross-linking agents may be used in New Zealand although no use was actually identified in this survey Isocyanate cross-links with 'impurities' in the PVA including hydroxyl and carboxyl groups This cross-linking agent results

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Effect of Boric Acid on the Foaming Properties and Cell

The cross-linking between the PVA and the BA reduced the difference between the permeabilities of CO 2 and N 2 gas in the PVA which could improve the bubble collapse situation in the PVA foams An increase in the added BA increased the volume expansion ratio and cell density of the PVA foam

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PREFACE

Cross-linking agents include chromium and aluminium salts Several sources indicated that isocyanate cross-linking agents may be used in New Zealand although no use was actually identified in this survey Isocyanate cross-links with 'impurities' in the PVA including hydroxyl and carboxyl groups This cross-linking agent results

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SCIENCE ENHANCEMENT SLIME PROGRAMME

mixing PVA and Borax in a 5:1 ratio • Place PVA solution in a beaker and add the appropriate amount of borax • Stir rapidly with a glass rod to ensure total mixing Within seconds the slime forms • Allow to stand for a few minutes whilst the cross-linking continues The effect of various variables can be investigated quantitatively e g

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FUN WITH BORON

In water borax dissolves to form the borate anion a boron atom surrounded by OH (hydroxyl) groups Look at those four OH groups hanging on the boron Those will be important in a minute You have several choices of polymer to cross-link with our borate anion The first one you will play with is called polyvinyl alcohol or PVA for short

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What exactly is slime and what is it made of?

There are two different types of slime One that is based on Elmer's glue one that is much simpler and easier to prepare using just two ingredients The Elmer's glue version uses 2 ounces of Elmer's glue two teaspoons of baking soda and two teas

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Borax – The Modern 4

I started with a classic slime recipe made with Borax But I tried it with clear glue You can find Borax in the laundry detergent aisle Most slimes use something with Borate (boric acid sodium borate Borax powder) so that the Borate ions activate the PVA (polyvinyl acetate) glue to form the slime This is called cross-linking

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