Structural characterisation of the small rubber particles in fresh Hevea latex

Sakdapipanich Jitladda Tangpakdee, . and Suksujaritporn Sirisak, . and Tanaka Yasuyuki, . Structural characterisation of the small rubber particles in fresh Hevea latex. pp. 160-168. ISSN 1511-1768

The rubbers from small and large rubber particles were separated from the serum and cream phases of centrifuged fresh Hevea latex respectively. The small rubber particles (SRP) consist of rubber molecules showing a unimodal molecular weight distribution (MWD) with a peak-top value falling between the two peak values of the bimodal MWD observed in rubbers from the large rubber particles (LRP). The rubber in LRP from mature trees and SRP from seedlings are polyisoprene molecules terminated by phospholipids comprising branching points while that in SRP are presumed to be linear molecules containing no phospholipid terminal. Comparative data of MW and structure between the SRP obtained from the serum phase of fresh latex and those of the SRP obtained from seedling latex are reported. The mechanism controlling MW in connection with the relationship among MW branching gel and particle size.

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Abstract

The rubbers from small and large rubber particles were separated from the serum and cream phases of centrifuged fresh Hevea latex respectively. The small rubber particles (SRP) consist of rubber molecules showing a unimodal molecular weight distribution (MWD) with a peak-top value falling between the two peak values of the bimodal MWD observed in rubbers from the large rubber particles (LRP). The rubber in LRP from mature trees and SRP from seedlings are polyisoprene molecules terminated by phospholipids comprising branching points while that in SRP are presumed to be linear molecules containing no phospholipid terminal. Comparative data of MW and structure between the SRP obtained from the serum phase of fresh latex and those of the SRP obtained from seedling latex are reported. The mechanism controlling MW in connection with the relationship among MW branching gel and particle size.

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Item Type:	Article
AGROVOC Term:	Rubber
AGROVOC Term:	Hevea
AGROVOC Term:	Latex
AGROVOC Term:	Molecular weight
AGROVOC Term:	Centrifugation
AGROVOC Term:	Measurement
AGROVOC Term:	Esters
AGROVOC Term:	Nitrogen content
AGROVOC Term:	Particle size
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:28
URI:	http://webagris.upm.edu.my/id/eprint/23300

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