| dc.description.abstract | Rubber with a low Plasticity Retention Index (PRI) is more likely to oxidize into soft
rubber, whereas rubber with a high PRI value has an oxidation-resistant molecular
chain. The initial plasticity value also has an effect on PRI, which is influenced by
two opposite factors: the value of the rubber's hardening, which goes up, and the
value of the rubber's oxidation, which goes down. Using a Wallace Plastimeter, the
Plasticity Retention Index is a straightforward test used to determine the elastic
resistance to degradation caused by oxidation at high temperatures or wear and
tear. The Wallace Plastimeter method was used to analyze the PRI value on crumb
rubber, and the results were obtained. The PRI value for samples measuring 2.8
mm was 63%, the PRI value for samples measuring 3.0 mm was 68%, the PRI value
for samples measuring 3.2 mm was 69%, the PRI value for samples measuring 3.4
mm was 70%, the PRI value for samples measuring 3.6 mm was 70%, the PRI value
for samples measuring 3.8 mm was 71%, the PRI value for samples measuring 4.0
mm was 72%, the PRI value for samples measuring 4.2 The worth of the Versatility
Maintenance File (PRI) incredibly impacts the nature of elastic on the grounds that
the more prominent the worth created, the better the opposition of elastic to
debasement at high temperatures. The Pliancy Maintenance List (PRI) got during
testing has met the SNI 1970: 2017 Standard Elastic File (SIR) by taking the PRI
worth of 40%. During the testing, the Plasticity Retention Index was found to be
between 63% and 77%. | en_US |
