Ontology type: schema:ScholarlyArticle
1998-04
AUTHORS ABSTRACTIn this paper the effects of the reactivity of hydroxyl functional oligomers with a polyisocyanate crosslinking agent have been demonstrated by comparing the potlife/hardness of a 3.5 VOC two-component polyurethane clear coat based on a low TG, high reactive against a high TG, low reactive oligomer. The reaction rate of two polymers forming a crosslinked network becomes diffusion controlled when, during the reaction, the increasing TG comes close to the reaction temperature.4 If this reaction takes place in the presence of a solvent which evaporates during film formation and crosslinking, the speed of evaporation will affect both the reaction rate and the film TG. The results of this study have shown that the reactivity determines the potlife whilst the TG controls the hardness. The reactivity of blends of such oligomers against pure oligomers is different as can be calculated using the theory of branching processes and as shown from practical measurements. Blends of oligomers or a pure oligomer with up to 75% of the properties of the high TG, low reactive oligomer do show a hardness close to the properties of the low TG, high reactive oligomer which further proves that the chemical reactivity controls the overall drying performance. A fast chemical reactivity shortens the potlife with a risk of solvent entrapment near to and at the gel point which results in low hardness. More... »
PAGES172-177
http://scigraph.springernature.com/pub.10.1007/bf02693857
DOIhttp://dx.doi.org/10.1007/bf02693857
DIMENSIONShttps://app.dimensions.ai/details/publication/pub.1002050255
JSON-LD is the canonical representation for SciGraph data.
TIP: You can open this SciGraph record using an external JSON-LD service: JSON-LD Playground Google SDTT
[
{
"@context": "https://springernature.github.io/scigraph/jsonld/sgcontext.json",
"about": [
{
"id": "http://purl.org/au-research/vocabulary/anzsrc-for/2008/0303",
"inDefinedTermSet": "http://purl.org/au-research/vocabulary/anzsrc-for/2008/",
"name": "Macromolecular and Materials Chemistry",
"type": "DefinedTerm"
},
{
"id": "http://purl.org/au-research/vocabulary/anzsrc-for/2008/03",
"inDefinedTermSet": "http://purl.org/au-research/vocabulary/anzsrc-for/2008/",
"name": "Chemical Sciences",
"type": "DefinedTerm"
}
],
"author": [
{
"affiliation": {
"name": [
"Du Pont de Nemours, Spinoystraat 6, 2800, Mechelen, Belgium"
],
"type": "Organization"
},
"familyName": "Huybrechts",
"givenName": "J",
"id": "sg:person.07532363137.60",
"sameAs": [
"https://app.dimensions.ai/discover/publication?and_facet_researcher=ur.07532363137.60"
],
"type": "Person"
},
{
"affiliation": {
"alternateName": "Institute of Macromolecular Chemistry",
"id": "https://www.grid.ac/institutes/grid.424999.b",
"name": [
"Du Pont de Nemours, Spinoystraat 6, 2800, Mechelen, Belgium",
"Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Hevirovskeho nam.2, 16206, Prague 6, Czech Republic"
],
"type": "Organization"
},
"familyName": "Dusek",
"givenName": "K",
"id": "sg:person.01151570140.64",
"sameAs": [
"https://app.dimensions.ai/discover/publication?and_facet_researcher=ur.01151570140.64"
],
"type": "Person"
}
],
"citation": [
{
"id": "https://doi.org/10.1016/0033-0655(93)80020-b",
"sameAs": [
"https://app.dimensions.ai/details/publication/pub.1047173959"
],
"type": "CreativeWork"
},
{
"id": "sg:pub.10.1007/bf02693852",
"sameAs": [
"https://app.dimensions.ai/details/publication/pub.1047826135",
"https://doi.org/10.1007/bf02693852"
],
"type": "CreativeWork"
},
{
"id": "sg:pub.10.1007/bf02693852",
"sameAs": [
"https://app.dimensions.ai/details/publication/pub.1047826135",
"https://doi.org/10.1007/bf02693852"
],
"type": "CreativeWork"
}
],
"datePublished": "1998-04",
"datePublishedReg": "1998-04-01",
"description": "In this paper the effects of the reactivity of hydroxyl functional oligomers with a polyisocyanate crosslinking agent have been demonstrated by comparing the potlife/hardness of a 3.5 VOC two-component polyurethane clear coat based on a low TG, high reactive against a high TG, low reactive oligomer. The reaction rate of two polymers forming a crosslinked network becomes diffusion controlled when, during the reaction, the increasing TG comes close to the reaction temperature.4 If this reaction takes place in the presence of a solvent which evaporates during film formation and crosslinking, the speed of evaporation will affect both the reaction rate and the film TG. The results of this study have shown that the reactivity determines the potlife whilst the TG controls the hardness. The reactivity of blends of such oligomers against pure oligomers is different as can be calculated using the theory of branching processes and as shown from practical measurements. Blends of oligomers or a pure oligomer with up to 75% of the properties of the high TG, low reactive oligomer do show a hardness close to the properties of the low TG, high reactive oligomer which further proves that the chemical reactivity controls the overall drying performance. A fast chemical reactivity shortens the potlife with a risk of solvent entrapment near to and at the gel point which results in low hardness.",
"genre": "research_article",
"id": "sg:pub.10.1007/bf02693857",
"inLanguage": [
"en"
],
"isAccessibleForFree": false,
"isPartOf": [
{
"id": "sg:journal.1335436",
"issn": [
"1356-0751"
],
"name": "Surface Coatings International",
"type": "Periodical"
},
{
"issueNumber": "4",
"type": "PublicationIssue"
},
{
"type": "PublicationVolume",
"volumeNumber": "81"
}
],
"name": "Star oligomers with different reactivity in low VOC polyurethane coatings: Part II",
"pagination": "172-177",
"productId": [
{
"name": "readcube_id",
"type": "PropertyValue",
"value": [
"09c3a26d754cd28f62af568559e6fdb443c3d171d4dce21d76bd03d2af108e07"
]
},
{
"name": "doi",
"type": "PropertyValue",
"value": [
"10.1007/bf02693857"
]
},
{
"name": "dimensions_id",
"type": "PropertyValue",
"value": [
"pub.1002050255"
]
}
],
"sameAs": [
"https://doi.org/10.1007/bf02693857",
"https://app.dimensions.ai/details/publication/pub.1002050255"
],
"sdDataset": "articles",
"sdDatePublished": "2019-04-11T13:33",
"sdLicense": "https://scigraph.springernature.com/explorer/license/",
"sdPublisher": {
"name": "Springer Nature - SN SciGraph project",
"type": "Organization"
},
"sdSource": "s3://com-uberresearch-data-dimensions-target-20181106-alternative/cleanup/v134/2549eaecd7973599484d7c17b260dba0a4ecb94b/merge/v9/a6c9fde33151104705d4d7ff012ea9563521a3ce/jats-lookup/v90/0000000370_0000000370/records_46769_00000000.jsonl",
"type": "ScholarlyArticle",
"url": "http://link.springer.com/10.1007/BF02693857"
}
]
Download the RDF metadata as: json-ld nt turtle xml License info
JSON-LD is a popular format for linked data which is fully compatible with JSON.
curl -H 'Accept: application/ld+json' 'https://scigraph.springernature.com/pub.10.1007/bf02693857'
N-Triples is a line-based linked data format ideal for batch operations.
curl -H 'Accept: application/n-triples' 'https://scigraph.springernature.com/pub.10.1007/bf02693857'
Turtle is a human-readable linked data format.
curl -H 'Accept: text/turtle' 'https://scigraph.springernature.com/pub.10.1007/bf02693857'
RDF/XML is a standard XML format for linked data.
curl -H 'Accept: application/rdf+xml' 'https://scigraph.springernature.com/pub.10.1007/bf02693857'
This table displays all metadata directly associated to this object as RDF triples.
77 TRIPLES
21 PREDICATES
29 URIs
19 LITERALS
7 BLANK NODES