Graft copolymerisation of some hydrophilic vinyl monomers in natural rubber

Erbil H. Y., . Graft copolymerisation of some hydrophilic vinyl monomers in natural rubber. pp. 234-239. ISSN 0127-7065

Attempts have been made to graft hydrophilic vinyl monomers such as 2-hydroxyethyl meth-acrylate n-vinyl pyrollidone and methacrylic acid onto natural rubber (NR) using procedures similar to those for grafting methyl methacrylate monomer onto NR latex in order to use the copolymers as a contact lens material. However these hydrophilic monomers could not be grafted with hydroperoxide-polyamine and ammonium persulphate-sodium meta bisulphite initiator systems due to their high solubilities in the water phase of NR latex. The monomer 2-hydroxethyI methacrylate could not be grafted onto dry NR in benzene solution because of its high self propagation tendency. A blend of homopolymers was produced. The reduction of the pendant methacrylate groups on NR-methyl methacrylate graft copolymer with LiAlH4 in tetrahydrofuran solution introduced hydroxyl groups and hydrophilicity and reduced the transparency of the reaction product.

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Abstract

Attempts have been made to graft hydrophilic vinyl monomers such as 2-hydroxyethyl meth-acrylate n-vinyl pyrollidone and methacrylic acid onto natural rubber (NR) using procedures similar to those for grafting methyl methacrylate monomer onto NR latex in order to use the copolymers as a contact lens material. However these hydrophilic monomers could not be grafted with hydroperoxide-polyamine and ammonium persulphate-sodium meta bisulphite initiator systems due to their high solubilities in the water phase of NR latex. The monomer 2-hydroxethyI methacrylate could not be grafted onto dry NR in benzene solution because of its high self propagation tendency. A blend of homopolymers was produced. The reduction of the pendant methacrylate groups on NR-methyl methacrylate graft copolymer with LiAlH4 in tetrahydrofuran solution introduced hydroxyl groups and hydrophilicity and reduced the transparency of the reaction product.

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Item Type:	Article
AGROVOC Term:	Natural rubber
AGROVOC Term:	Polymers
AGROVOC Term:	Hydrophilicity
AGROVOC Term:	Hydroxylation
AGROVOC Term:	Latex
AGROVOC Term:	Polyamines
AGROVOC Term:	Lens
AGROVOC Term:	Biomedical engineering
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:28
URI:	http://webagris.upm.edu.my/id/eprint/23616

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