THE RESISTANCE OF WOOD PLASTIC COMPOSITE TO THE DRY-WOOD TERMITE Cryptotermes cynocephalus Light. AND THE SUBTERRANEAN TERMITE Coptotermes curvignathus Holmgren INFESTATION

Published Date

Jasni Jasni, Nurwati Hadjib, Barly Barly, Yusuf Sudo Hadi, Y. Afidudin

Abstract

Wood  plastic  composites   (WPC) were made  by impregnating  monomer   and  vinyl acetate monomer  with addition  of  terbutyl peroxide  catalyst. This laboratory  scale experiment  aimed at looking into  the durability of  WPC polymerized  at varying mixture  ratios between  styrene and vinyl acetate monomers,  compared  to the natural   durability of  the corresponding   wood  treated with impralit CKB.  In this  regard,  wood  samples were dried until 10 % moisture  content,   and then  they were put in the tank under  20 mm Hg vacuum was being released.   Styrene  monomer with vinyl acetate  addition was flown to the tank, and the wood  samples were immersed  in the monomer   for  24 hours.   Furthermore,   the wood  samples  were taken  out,  and  wrapped  with aluminum  foil, and then were   put in the oven for 24 hours at 60° C. The  wraps were opened, and the samples were  conditioned.   The  samples were tested  to dry wood  termite  (Cryptotermes cynocephalus Light.),  and the Subterranean  termite (Coptotermes curvignathus Holmgren.).  Investigated factors were (i) wood species consisting of sengon, pine, and rubber wood, and (ii) ratio of styrene to vinyl acetate. i.e.  90/10;  80/20;  70/30;  and 60/40.   For comparison,  each wood samples  treated with  Impralit  CKB  3% and untreated   (unpolymerized)    wood  samples  (a control)  were  also prepared.  The  results showed  that polymer  loadings  in the  sengon, pine and rubber  wood were 118 %, 72 % and  44%  respectively. Increasing  of  vinyl acetate  to styrene  tended  to decrease polymer loading,  the addition  of  10% gave 96% polymer  loading,  20% gave 108%,  30% gave 71 %, and 30% gave 38 % respectively.  It appeared that treatment  of styrene with low vinyl acetate additions  (60:40) had resulted  in consecutively  95.67%  and 97.75 % mortality  of  the dry wood termite  and sub subterranean   termite. This implied  that the treatment  might increase the wood resistance  to the wood destroying insect.

Keywords

Wood Plastic Composite (WPC), termites, durability, Impralit CKB

Full Text:

PDF

References

AWPA. 1972. Standard Method for Laboratory Evaluation to Determine Resistance to Subterranean Termites. American Wood Preservative's Association, Woodstock, Md. Blout, E.R., WP Hohenstein and H. Mark. 1949. Monomers. Interscience Publishers, Inc. New York. Dirgantara.,U. 1988. Pengarnh dosis iradiasi dan posisi bambu betung (Dendrocalamus asper) yang diirnpregnasi polimerisasi dengan sterina terhadap serangan jamur pelapuk kayu (SchiZfJp}gllum commune Fr.). Skripsi Jurusan THH Fahutan IPB. Tidak dipublikasikan.

Fengel, D. and G. Wegener. 1995. Kayu: Kimia, Ultra structure, Reaksi-reaksi (Terjemahan oleh Harjono, S). Gadjah Mada University Press. Yogyakarta.

Hadi,YS., D.S. Nawawi, E.N. Herliyana, and M. Lawniczak. 1998. Termites Attack Resistance of Four Polystyrene-Impregnated Wood from Poland. Forest Product Journal.48(9):60-62.

Mandang, Y.I and I.KN. Pandit. 1997. Pedoman Identifikasi Jenis Kayu di Lapangan. Yayasan Prosea, Pusat Diklat Pegawai dan SDM Kehutanan. Bogor.

Martawijaya, A. 1996. Keawetan Kayu dan Faktor yang Mempengaruhinya. Petunjuk Teknis. Pusat Penelitianclan Pengembangan Hasil Hutan dan SosialEkonomi Kehutanan. Balitbang Kehutanan, Bogor.

Sajidin. 1977. Pengaruh tingkat konsentrasi urea dan system impregnasi pada polimerisasi radiasi terhadap sifat fisis clan mekanis bamboo betung. Skripsi Jurusan THH Fahutan IPB. Tidak dipublikasikan.

Somuwat, Y 1996. Studies on Damage of Constructions Caused by Subterranean Termites and Its Control in Thailand. Paper in Lab. BHH Pau Ilmu Hayat. Not Published.

Sukman, A. 1996. Keawetan kayu karet vinil asetat terhadap rayap kayu kering (Cryptotermes cynocephalus Light) dan bubuk kayu kering (Heterobostrychus aequalis Wat.). Skripsi Jurusan Teknologi Hasil Hutan. Fakultas Kehutanan, IPB. Tidak dipublikasikan.

Supriana, N. 1984. Perilaku Rayap. Pusat Penelitian clan Pengembangan Hasil Hutan, Bogor.

Susanti, U. 1997. Ketahanan kayu karet (Hevea brasilliensisMuell. Arg.) terpolimerisasi terhadap serangan jamur pelapuk (S chizopfgll11m commune Fr.). Skripsi pada Jurusan MNH Fahutan IPB. Tidak diterbitkan.

Tambunan, B. and D. Nandika.1989. Deteriorasi kayu oleh faktor biologis. Pusat Antar Universitas Bioteknologi IPB. Bogor.

DOI: http://dx.doi.org/10.20886/ijfr.2004.1.1.50-59

For further details log on website :
http://ejournal.forda-mof.org/ejournal-litbang/index.php/IJFR/article/view/488