A novel method to crosslink natural rubber latex adhesive at ambient temperature

Thongnuanchan, Bencha; Ninjan, Rattanawadee; Kaesaman, Azizon; Nakason, Charoen

doi:10.1007/s00289-014-1264-5

Cited by 15 publications

(6 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…When the latex was dehydrated, carboxylic acid ammonium was converted back to carboxyl, with a catalytic effect. The carbonyl on the surface of the latex microsphere reacted with ADH under the catalysis of carboxyl [32,33], resulting in cross-linking of the latex microspheres. The cross-linking reaction occurs according to Scheme 1.…”

Section: Photodegradation Of the Cross-link Chain In The Latex Filmmentioning

confidence: 99%

Photodegradation of Polymer Materials Used for Film Coatings of Controlled‐Release Fertilizers

Yang

Wang

et al. 2017

Chem Eng & Technol

View full text Add to dashboard Cite

The photodegradation of three polymer materials was studied, i.e., polyolefin, polyurethane, and a copolymer of styrene, butyl acrylate, and methyl methacrylate (P(St-co-BA-co-MMA) latex). These polymers are mostly used as film-coating materials for producing controlled-release fertilizers. The P(St-co-BA-co-MMA) latex film degraded at the highest rate and the film surface became porous under UV irradiation. The weak cross-link chain in the latex film was broken and the connections between the microspheres were destroyed. A photo-oxidative aging reaction weakened the tenacity of the latex film, which resulted in the easy release of microspheres from the film, leading to a reduction in film thickness and film tensile strength. Threfore, P(St-co-BA-co-MMA) latex is a promising coating material for controlled-release fertilizers.

show abstract

Section: Photodegradation Of the Cross-link Chain In The Latex Filmmentioning

confidence: 99%

Photodegradation of Polymer Materials Used for Film Coatings of Controlled‐Release Fertilizers

Yang

Wang

et al. 2017

Chem Eng & Technol

View full text Add to dashboard Cite

show abstract

“…A single tan δ peak was observed in all cases. In general, the T g determined by DSC tends to be lower than that from DMTA . A single T g was observed for all samples with grafted copolymer.…”

Section: Resultsmentioning

confidence: 77%

Influences of the grafting percentage of natural rubber‐graft‐poly(2‐hydroxyethyl acrylate) on properties of its vulcanizates

Chueangchayaphan

Tanrattanakul

et al. 2018

Polymer International

View full text Add to dashboard Cite

The graft copolymerization of 2‐hydroxyethyl acrylate (HEA) monomer onto natural rubber (NR) latex was successful using cumene hydroperoxide and tetraethylene pentamine as redox initiators. The grafting of poly(2‐hydroxyethyl acrylate) (PHEA) on the NR particles was confirmed by Fourier transform infrared spectroscopy, 1H NMR spectroscopy and TEM. The NR‐g‐PHEA with various grafting percentages (0%, 8.7%, 14.3% and 18.7%) was compounded on a two‐roll mill with a sulfur vulcanization system. The effects of grafting percentage on the cure characteristics, dielectric properties, thermal properties and physical properties of NR‐g‐PHEA vulcanizates were investigated. It was found that increased grafting caused NR‐g‐PHEA vulcanizates to have reduced water contact angle, scorch time and cure time, while the dielectric constant and dissipation factor increased. The NR‐g‐PHEA vulcanizate with 8.7% grafting exhibited the highest delta torque (MH − ML), crosslink density, tensile strength, moduli at 100%, 200% and 300% strains, and hardness, with insignificant loss of elongation at break in comparison to the other cases. © 2018 Society of Chemical Industry

show abstract

“…Graft copolymers of NR and PDAAM containing 10 wt% of DAAM was prepared in‐house using high‐ammonia‐concentrated NR latex with a dry rubber content of 61.3%. The details of preparation and characterization procedures of the NR‐g‐PDAAM10 have been described in our previous work . The mole percentage of grafted PDAAM on NR molecules was estimated from the intensity ratio of signals in 1 H‐NMR spectrum of NR‐g‐PDAAM10 using the following relationships

mol % of PDAAM = ((),, \frac{I_{2.15} / 3}{I_{2.15} / 3 + I_{5.13}}) \times 100

where I 2.15 = the integrated peak area of the methyl‐ketone protons in PDAAM repeat units and I 5.13 = the integrated peak area of the olefinic protons of NR.…”

Section: Methodsmentioning

confidence: 99%

“…It is observed that the solubility in water of DAAM (~5.92 mol/l) is much higher than those of methyl methacrylate (~1.56 × 10 −1 mol/l) and styrene (~1.15 × 10 −3 mol/l) at 20°C, which have been reported to be the most suitable vinyl monomers for grafting on the NR molecule . Additionally, DAAM also contains amide groups in its molecule (Scheme ), which is the same functional groups present in the backbone of PAs …”

Section: Introductionmentioning

confidence: 99%

Improving properties of natural rubber/polyamide 12 blends through grafting of diacetone acrylamide functional group

Thongnuanchan

Rattanapan

Persalea

et al. 2017

Polym. Adv. Technol.

Self Cite

View full text Add to dashboard Cite

The aim of the present study was to improve the compatibility in blends of natural rubber (NR) and polyamide 12 (PA12) by grafting NR with hydrophilic monomer, diacetone acrylamide (DAAM), via seeded emulsion polymerization. The increase in polarity of NR after grafting modification was confirmed by a considerable increase in the polar component of its surface energy. Blends of graft copolymers of NR and poly(diacetone acrylamide) prepared using 10 wt% of DAAM (NR-g-PDAAM10) and PA12 were prepared at a 60/40 blend ratio (wt%) using simple blend and dynamic vulcanization techniques. The mechanical and rheological properties of the resulting blends were subsequently investigated and compared with those of the corresponding blends based on unmodified NR. The results show that dynamic vulcanization led to a significant increase in both mechanical and rheological properties of the blends. It was also observed that the dynamically cured NR-g-PDAAM10/PA12 blend had smaller particle size of vulcanized rubber dispersed in the PA12 matrix than observed for the dynamically cured NR/PA12 blend. This is due to the compatibilizing effect of DAAM groups present in NR-g-PDAAM10 molecule, which decreases the interfacial tension between the two polymeric phases. Therefore, it can be stated that the interfacial adhesion between NR and PA12 was improved by the presence of DAAM groups in NR molecule. This was reflected in the higher tensile properties observed in the dynamically cured NR-g-PDAAM10/PA12 blend. Scheme 1. Structures of (a) diacetone acrylamide and (b) the possible hydrogen bonds formed between NR-g-PDAAM and PA12 chains. PA12, polyamide 12; NR-g-PDAAM10, graft copolymers of natural rubber and poly(diacetone acrylamide) containing 10 wt% of diacetone acrylamide.

show abstract

A novel method to crosslink natural rubber latex adhesive at ambient temperature

Cited by 15 publications

References 13 publications

Photodegradation of Polymer Materials Used for Film Coatings of Controlled‐Release Fertilizers

Photodegradation of Polymer Materials Used for Film Coatings of Controlled‐Release Fertilizers

Influences of the grafting percentage of natural rubber‐graft‐poly(2‐hydroxyethyl acrylate) on properties of its vulcanizates

Improving properties of natural rubber/polyamide 12 blends through grafting of diacetone acrylamide functional group

Contact Info

Product

Resources

About